{"id":56930,"date":"2026-09-23T23:43:14","date_gmt":"2026-09-23T23:43:14","guid":{"rendered":"https:\/\/zobai.com\/?p=56930"},"modified":"2026-10-27T10:42:03","modified_gmt":"2026-10-27T10:42:03","slug":"single-psv-vs-dual-psv-when-redundancy-changes-the-relief-design","status":"publish","type":"post","link":"https:\/\/zobai.com\/ar\/blog\/single-psv-vs-dual-psv-when-redundancy-changes-the-relief-design\/","title":{"rendered":"\u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0648\u0627\u062d\u062f PSV \u0645\u0642\u0627\u0628\u0644 \u0635\u0645\u0627\u0645\u064a\u0646 PSV: \u0645\u062a\u0649 \u062a\u063a\u064a\u0651\u0631 \u0627\u0644\u062a\u0643\u0631\u0627\u0631\u064a\u0629 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633"},"content":{"rendered":"<style>\n.zobai-psv-comparison { max-width: 100%; overflow-wrap: anywhere; }\n.zobai-psv-comparison .zobai-table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.5rem 0; }\n.zobai-psv-comparison .zobai-table-wrap table { width: 100%; min-width: 680px; border-collapse: collapse; }\n.zobai-psv-comparison .zobai-table-wrap th, .zobai-psv-comparison .zobai-table-wrap td { padding: 0.75rem; text-align: left; vertical-align: top; border: 1px solid currentColor; }\n.zobai-psv-comparison .zobai-note { margin: 1.5rem 0; padding: 1rem 1.25rem; border-left: 3px solid currentColor; }\n.zobai-psv-comparison .zobai-cta { margin-top: 2rem; padding: 1.25rem; border: 1px solid currentColor; }\n.zobai-psv-comparison .zobai-cta p:last-child { margin-bottom: 0; }\n@media (max-width: 390px) { .zobai-psv-comparison .zobai-table-wrap { margin-left: 0; margin-right: 0; } .zobai-psv-comparison .zobai-note, .zobai-psv-comparison .zobai-cta { padding: 1rem; } }\n<\/style>\n<article class=\"zobai-psv-comparison\">\n<p class=\"translation-block\"><strong>\u0625\u0646 \u062a\u0631\u062a\u064a\u0628\u064b\u0627 \u064a\u0636\u0645 \u0635\u0645\u0627\u0645\u064a PSV \u0644\u0627 \u064a\u064f\u0639\u062f \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0646\u0633\u062e\u0629 \u0630\u0627\u062a \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629 \u0645\u0646 \u062a\u0631\u062a\u064a\u0628 \u064a\u0636\u0645 \u0635\u0645\u0627\u0645 PSV \u0648\u0627\u062d\u062f\u064b\u0627<\/strong>.<br>\n\u0641\u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u062b\u0627\u0646\u064a \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u064b\u0627 \u0644\u0625\u062a\u0627\u062d\u0629 \u0627\u0644\u0635\u064a\u0627\u0646\u0629\u060c \u0623\u0648 \u0635\u0645\u0627\u0645\u064b\u0627 \u0622\u062e\u0631 \u0639\u0627\u0645\u0644\u064b\u0627 \u062a\u064f\u062d\u062a\u0633\u0628 \u0633\u0639\u062a\u0647 \u0636\u0645\u0646 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u060c \u0623\u0648 \u062c\u0632\u0621\u064b\u0627 \u0645\u0646 \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u0631\u062d\u0644\u064a\u0629 \u062a\u0633\u062a\u062e\u062f\u0645 \u0639\u062f\u0629 \u0623\u062c\u0647\u0632\u0629.<br>\n\u0648\u0647\u0630\u0647 \u0627\u0644\u0623\u063a\u0631\u0627\u0636 \u0644\u064a\u0633\u062a \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0628\u0639\u0636\u0647\u0627 \u0628\u0628\u0639\u0636.<\/p>\n<p>\n    \u0644\u0630\u0644\u0643 \u064a\u062c\u0628 \u0623\u0646 \u062a\u0628\u062f\u0623 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0628\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0648\u0644\u064a\u0633 \u0628\u0639\u062f\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a. \u0625\u0630\u0627 \u0643\u0627\u0646 PSV \u0627\u0644\u062b\u0627\u0646\u064a<br \/>\n    \u064a\u0633\u0627\u0647\u0645 \u0641\u064a \u0627\u0644\u0633\u0639\u0629\u060c \u062a\u0646\u062a\u0642\u0644 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0646\u062d\u0648 \u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0633\u0639\u0629\u060c \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629\u060c \u0648\u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647<br \/>\n    \u0623\u0633\u0627\u0633 \u0627\u0644\u0636\u063a\u0637 \u0644\u0639\u062f\u0629 \u0623\u062c\u0647\u0632\u0629. \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u064b\u0627\u060c \u062a\u0635\u0628\u062d \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u062d\u0631\u062c\u0629 \u0647\u064a \u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0627\u0644\u0639\u0632\u0644 \u0648<br \/>\n    \u0645\u0627 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062a\u064a \u062a\u0628\u0642\u0649 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u0635\u064a\u0627\u0646\u0629. \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u062a\u0634\u062a\u0631\u0643 \u0641\u064a \u0645\u0634\u0639\u0628 \u0633\u062d\u0628 \u0623\u0648 \u0631\u0623\u0633 \u062a\u0635\u0631\u064a\u0641\u060c \u0641\u0625\u0646 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628<br \/>\n    \u0642\u062f \u062a\u0631\u0628\u0637 \u0633\u0644\u0648\u0643\u0647\u0627 \u0639\u0644\u0649 \u0627\u0644\u0631\u063a\u0645 \u0645\u0646 \u0648\u062c\u0648\u062f \u062c\u0633\u0645\u064a \u0635\u0645\u0627\u0645 \u0645\u0646\u0641\u0635\u0644\u064a\u0646.\n  <\/p>\n<p class=\"translation-block\">\u0625\u0646 \u0645\u062e\u0637\u0637 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0648\u0627\u0644\u0623\u062c\u0647\u0632\u0629 (P&amp;ID) \u0627\u0644\u0630\u064a \u064a\u064f\u0638\u0647\u0631 \u0635\u0645\u0627\u0645\u064a \u062a\u0646\u0641\u064a\u0633 \u0644\u0627 \u064a\u0648\u0636\u062d\u060c \u0628\u0645\u0641\u0631\u062f\u0647\u060c \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062a\u064a \u062a\u064f\u062d\u062a\u0633\u0628 \u0641\u064a \u0627\u0644\u062d\u0633\u0627\u0628\u0627\u062a\u060c \u0623\u0648 \u0645\u0627 \u064a\u062d\u062f\u062b \u0639\u0646\u062f \u062a\u0639\u0630\u0631 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0623\u062d\u062f \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646\u060c \u0623\u0648 \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0645\u0633\u0627\u0631\u0627 \u0627\u0644\u062a\u062f\u0641\u0642 \u0645\u0633\u062a\u0642\u0644\u064a\u0646 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u064b\u0627.<br>\n\u0644\u0630\u0627 \u0641\u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629 \u0627\u0644\u0645\u0641\u064a\u062f\u0629 \u0644\u064a\u0633\u062a \u0645\u062c\u0631\u062f \u0645\u0642\u0627\u0631\u0646\u0629<br>\n<strong>\u0635\u0645\u0627\u0645 PSV \u0648\u0627\u062d\u062f \u0628\u0635\u0645\u0627\u0645\u064a\u0646<\/strong>. \u0628\u0644 \u0627\u0644\u0633\u0624\u0627\u0644 \u0647\u0648: <strong>\u0645\u0627 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062a\u064a \u064a\u064f\u0641\u062a\u0631\u0636 \u0623\u0646 \u064a\u0624\u062f\u064a\u0647\u0627 \u0635\u0645\u0627\u0645 PSV \u0627\u0644\u062b\u0627\u0646\u064a\u060c<br>\n\u0648\u0645\u0627 \u0623\u062c\u0632\u0627\u0621 \u0646\u0638\u0627\u0645 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062a\u064a \u062a\u062a\u063a\u064a\u0631 \u0646\u062a\u064a\u062c\u0629 \u0644\u0630\u0644\u0643\u061f<\/strong><\/p>\n<aside class=\"zobai-note\">\n<p class=\"translation-block\">\u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u0642\u0627\u0644\u060c \u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0627\u062e\u062a\u0635\u0627\u0631 <strong>PSV<\/strong> \u0643\u062a\u0633\u0645\u064a\u0629 \u0645\u062e\u062a\u0635\u0631\u0629 \u0644\u0623\u063a\u0631\u0627\u0636 \u0639\u0645\u0644\u064a\u0629 \u0644\u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0630\u064a \u062a\u062a\u0646\u0627\u0648\u0644\u0647 \u0627\u0644\u0645\u0646\u0627\u0642\u0634\u0629.<br>\n      \u0648\u0642\u062f \u062a\u064f\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0627\u0644\u0625\u0646\u062c\u0644\u064a\u0632\u064a\u0629 pressure relief valve \u0648safety valve \u0648safety relief valve \u0628\u0645\u0639\u0627\u0646\u064d \u0623\u0648 \u0627\u0633\u062a\u0639\u0645\u0627\u0644\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u0645\u0646 \u0645\u0634\u0631\u0648\u0639 \u0625\u0644\u0649 \u0622\u062e\u0631\u060c \u062a\u0628\u0639\u064b\u0627<br>\n      \u0644\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0637\u0628\u0642 \u0648\u0638\u0631\u0648\u0641 \u0627\u0644\u062e\u062f\u0645\u0629 \u0648\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062c\u0647\u0627\u0632. \u0623\u0645\u0627 \u0641\u064a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0641\u0639\u0644\u064a\u060c \u0641\u062a\u0638\u0644 \u0623\u062d\u0643\u0627\u0645 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0648\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0648\u0646\u0648\u0639 \u0627\u0644\u062c\u0647\u0627\u0632<br>\n      \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u062a\u0646\u0638\u064a\u0645\u064a\u0629 \u0627\u0644\u0645\u062e\u062a\u0635\u0629 \u0647\u064a \u0627\u0644\u0645\u0631\u062c\u0639 \u0627\u0644\u062d\u0627\u0643\u0645.<\/p>\n<\/aside>\n<section aria-labelledby=\"why-second-psv\">\n<h2 id=\"why-second-psv\">\u0644\u0645\u0627\u0630\u0627 \u064a\u0648\u062c\u062f \u0635\u0645\u0627\u0645 PSV \u0627\u0644\u062b\u0627\u0646\u064a\u061f<\/h2>\n<p>\n      \u0642\u0628\u0644 \u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0623\u0648 \u062a\u062d\u062f\u064a\u062f \u0646\u0638\u0627\u0645 PSV \u0645\u0632\u062f\u0648\u062c\u060c \u0635\u0646\u0651\u0641 \u0627\u0644\u063a\u0631\u0636 \u0645\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u062b\u0627\u0646\u064a. \u0641\u0647\u0646\u0627\u0643 \u062b\u0644\u0627\u062b\u0629 \u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0642\u062f<br \/>\n      \u062a\u0628\u062f\u0648 \u062c\u0645\u064a\u0639\u0647\u0627 \u0623\u0646\u0638\u0645\u0629 \u201cPSV \u0645\u0632\u062f\u0648\u062c\u0629\u201d \u0641\u064a \u0631\u0633\u0645 \u0645\u0628\u0633\u0651\u0637\u060c \u0644\u0643\u0646\u0647\u0627 \u0642\u062f \u062a\u0645\u062b\u0644 \u0645\u0633\u0627\u0626\u0644 \u0647\u0646\u062f\u0633\u064a\u0629 \u0645\u062e\u062a\u0644\u0641\u0629.\n    <\/p>\n<p>\n      <strong>\u0627\u0644\u062a\u0634\u063a\u064a\u0644\/\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637.<\/strong> \u064a\u0643\u0648\u0646 \u0623\u062d\u062f \u0635\u0645\u0627\u0645\u064a PSV \u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0641\u0639\u0651\u0627\u0644\u060c \u0648\u0627\u0644\u0622\u062e\u0631 \u0645\u062a\u0627\u062d \u062d\u062a\u0649 \u064a\u0645\u0643\u0646<br \/>\n      \u0641\u062d\u0635 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0623\u0648\u0644 \u0623\u0648 \u0635\u064a\u0627\u0646\u062a\u0647 \u0636\u0645\u0646 \u062a\u0631\u062a\u064a\u0628 \u062a\u0628\u062f\u064a\u0644 \u0645\u0646\u0627\u0633\u0628. \u0627\u0644\u0647\u062f\u0641 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0647\u0648 \u062a\u0648\u0641\u0651\u0631<br \/>\n      \u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633 \u0645\u0624\u0647\u0651\u0644\u060c \u0648\u0644\u064a\u0633 \u0628\u0627\u0644\u0636\u0631\u0648\u0631\u0629 \u0632\u064a\u0627\u062f\u0629 \u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629.\n    <\/p>\n<p>\n      <strong>\u0635\u0645\u0627\u0645\u0627\u062a PSV \u0645\u062a\u0639\u062f\u062f\u0629 \u0641\u0639\u0651\u0627\u0644\u0629.<\/strong> \u064a\u0633\u0647\u0645 \u0627\u0644\u062c\u0647\u0627\u0632\u0627\u0646 \u0645\u0639\u064b\u0627 \u0628\u0633\u0639\u0629 \u062a\u0635\u0631\u064a\u0641 \u0645\u0639\u062a\u0645\u062f\u0629 \u0644\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a.<br \/>\n      \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u062d\u0627\u0644\u0629\u060c \u0642\u062f \u064a\u0624\u062f\u064a \u0625\u0632\u0627\u0644\u0629 \u0623\u062d\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u064a\u0646 \u0625\u0644\u0649 \u062e\u0641\u0636 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u062f\u0648\u0646 \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0645\u0627 \u0644\u0645<br \/>\n      \u064a\u0648\u0641\u0651\u0631 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0633\u0639\u0629 \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629 \u0639\u0646 \u0642\u0635\u062f.\n    <\/p>\n<p>\n      <strong>\u062a\u0646\u0641\u064a\u0633 \u0645\u0631\u062d\u0644\u064a \u0639\u0628\u0631 \u0623\u062c\u0647\u0632\u0629 \u0645\u062a\u0639\u062f\u062f\u0629.<\/strong> \u064a\u0634\u0627\u0631\u0643 \u0623\u0643\u062b\u0631 \u0645\u0646 \u062c\u0647\u0627\u0632 \u0648\u0627\u062d\u062f \u0641\u064a \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0644\u0643\u0646<br \/>\n      \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0644\u0627 \u062a\u0628\u062f\u0623 \u0628\u0627\u0644\u0636\u0631\u0648\u0631\u0629 \u0641\u064a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u062a\u062d\u062a \u0638\u0631\u0648\u0641 \u0636\u063a\u0637 \u0645\u062a\u0637\u0627\u0628\u0642\u0629. \u0623\u064a \u062a\u0631\u062a\u064a\u0628 \u0645\u062a\u062f\u0631\u062c \u0644\u0636\u0628\u0637 \u0627\u0644\u0636\u063a\u0637<br \/>\n      \u064a\u062c\u0628 \u0623\u0646 \u064a\u062a\u0628\u0639 \u0643\u0648\u062f \u0627\u0644\u0628\u0646\u0627\u0621 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647 \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0634\u0631\u0648\u0639\u061b \u0644\u0627 \u062a\u064f\u0639\u062f \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0628\u062f\u064a\u0644\u0627\u064b \u0639\u0646<br \/>\n      \u0642\u0627\u0639\u062f\u0629 \u0646\u0633\u0628\u0629 \u0639\u0627\u0645\u0629 \u0644\u062a\u0644\u0643 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629.\n    <\/p>\n<p>\n      \u0647\u0630\u0647 \u0627\u0644\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0644\u064a\u0633\u062a \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0628\u0627\u062f\u0644. \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\/\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u064a\u062a\u0639\u0644\u0642 \u0623\u0633\u0627\u0633\u064b\u0627 \u0628\u0640<br \/>\n      <strong>\u0627\u0644\u062a\u0648\u0627\u0641\u0631 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u0635\u064a\u0627\u0646\u0629<\/strong>. \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0646\u0634\u0637\u0629 \u064a\u062a\u0639\u0644\u0642 \u0623\u0633\u0627\u0633\u064b\u0627 \u0628\u0640<br \/>\n      <strong>\u0643\u064a\u0641\u064a\u0629 \u062a\u0648\u0641\u064a\u0631 \u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<\/strong>. \u064a\u0636\u064a\u0641 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0645\u0631\u062d\u0644\u064a \u0633\u0624\u0627\u0644\u0627\u064b \u0622\u062e\u0631:<br \/>\n      \u0643\u064a\u0641 \u064a\u064f\u0642\u0635\u062f \u0623\u0646 \u062a\u062f\u062e\u0644 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062e\u062f\u0645\u0629 \u0645\u0639 \u0627\u0631\u062a\u0641\u0627\u0639 \u0627\u0644\u0636\u063a\u0637.\n    <\/p>\n<p>\n      \u0639\u0645\u0644\u064a\u064b\u0627\u060c \u062a\u062d\u062a\u0627\u062c \u062f\u0631\u0627\u0633\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0635\u062d\u0627\u0626\u0641 \u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0648\u0642\u0627\u0626\u0645\u0629 \u0636\u0628\u0637 \u0627\u0644\u0636\u063a\u0637 \u0648\u0645\u062e\u0637\u0637 P&amp;ID \u0648\u0641\u0644\u0633\u0641\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\/\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0625\u0644\u0649<br \/>\n      \u0623\u0646 \u062a\u062d\u0643\u064a \u0627\u0644\u0642\u0635\u0629 \u0646\u0641\u0633\u0647\u0627. \u0625\u0630\u0627 \u0623\u0634\u0627\u0631 \u0627\u0644\u0631\u0633\u0645 \u0625\u0644\u0649 \u201c2 PSVs\u201d \u0644\u0643\u0646 \u0627\u0644\u062d\u0633\u0627\u0628 \u0644\u0627 \u064a\u0648\u0636\u062d \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0643\u0644\u062a\u0627 \u0627\u0644\u0633\u0639\u062a\u064a\u0646<br \/>\n      \u0645\u0639\u062a\u0645\u062f\u062a\u064a\u0646\u060c \u0641\u0625\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0644\u0627 \u064a\u0632\u0627\u0644 \u063a\u064a\u0631 \u0645\u062d\u062f\u062f.\n    <\/p>\n<p>\n      <strong>\u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u064a \u0627\u0644\u0623\u0648\u0644:<\/strong> \u0625\u0630\u0627 \u0623\u064f\u0632\u064a\u0644 \u0635\u0645\u0627\u0645 PSV \u0627\u0644\u062b\u0627\u0646\u064a \u0645\u0646 \u0627\u0644\u0631\u0633\u0645\u060c \u0641\u0645\u0627 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<br \/>\n      \u0627\u0644\u062a\u064a \u0633\u062a\u064f\u0641\u0642\u062f\u061f\n    <\/p>\n<ul>\n<li>\u0644\u0646 \u064a\u0643\u0648\u0646 \u0645\u0646 \u0627\u0644\u0645\u0645\u0643\u0646 \u062a\u0648\u0641\u064a\u0631 \u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0627\u0644\u0643\u0627\u0645\u0644\u0629.<\/li>\n<li>\u0644\u0646 \u064a\u0643\u0648\u0646 \u0645\u0646 \u0627\u0644\u0645\u0645\u0643\u0646 \u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0645\u0639 \u0627\u0644\u062d\u0641\u0627\u0638 \u0639\u0644\u0649 \u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633 \u0641\u0639\u0651\u0627\u0644.<\/li>\n<li>\u0633\u062a\u062e\u062a\u0641\u064a \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0631\u062d\u0644\u064a \u0627\u0644\u0645\u0642\u0635\u0648\u062f\u0629.<\/li>\n<li>\u0644\u0646 \u064a\u064f\u0641\u0642\u062f \u0623\u064a \u0634\u064a\u0621 \u062c\u0648\u0647\u0631\u064a\u060c \u0648\u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u062d\u0627\u0644\u0629 \u064a\u062c\u0628 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u0646\u0638\u0631 \u0641\u064a \u0633\u0628\u0628 \u0648\u062c\u0648\u062f \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u062b\u0627\u0646\u064a.<\/li>\n<\/ul>\n<p>\u062a\u062d\u062f\u062f \u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0641\u062d\u0648\u0635\u0627\u062a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062a\u064a \u062a\u0647\u0645 \u0628\u0639\u062f \u0630\u0644\u0643.<\/p>\n<figure class=\"wp-block-image size-full zobai-figure\" data-image-slot=\"IMG-01\"><img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01.webp\" alt=\"\u0645\u0642\u0627\u0631\u0646\u0629 \u062a\u0635\u0648\u0631\u064a\u0629 \u0628\u064a\u0646 \u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0636\u063a\u0637 \u0648\u0627\u062d\u062f PSV\u060c \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0648\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u060c \u0648\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0646\u0634\u0627\u0637\u060c \u0648\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0645\u0631\u062d\u0644\u064a\u0629.\" title=\"Single PSV vs Dual PSV: When Redundancy Changes the Relief Design - IMG-01\" width=\"1200\" height=\"900\" class=\"wp-image-56941\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-01-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u0645\u0642\u0627\u0631\u0646\u0629 \u062a\u0635\u0648\u0631\u064a\u0629 \u0628\u064a\u0646 \u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0636\u063a\u0637 \u0648\u0627\u062d\u062f PSV\u060c \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0648\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u060c \u0648\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0646\u0634\u0627\u0637\u060c \u0648\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0645\u0631\u062d\u0644\u064a\u0629.<\/figcaption><\/figure>\n<\/section>\n<section aria-labelledby=\"does-two-create-redundancy\">\n<h2 id=\"does-two-create-redundancy\">\u0647\u0644 \u0648\u062c\u0648\u062f \u0635\u0645\u0627\u0645\u064e\u064a PSV \u0641\u0639\u0644\u064a\u064b\u0627 \u064a\u062d\u0642\u0642 \u0627\u0644\u062a\u0643\u0631\u0627\u0631 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a\u061f<\/h2>\n<p><strong>\u0644\u064a\u0633 \u0628\u062d\u062f \u0630\u0627\u062a\u0647.<\/strong><\/p>\n<p>\n      \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0647\u0630\u0627 \u0627\u0644\u0645\u0642\u0627\u0644\u060c, <strong>\u0627\u0644\u062a\u0643\u0631\u0627\u0631 \u0627\u0644\u0648\u0638\u064a\u0641\u064a<\/strong> \u064a\u0639\u0646\u064a \u0623\u0646 \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u062e\u0635\u0635\u0629<br \/>\n      \u062a\u0638\u0644 \u0645\u062a\u0627\u062d\u0629 \u0639\u0646\u062f \u062a\u0639\u0630\u0631 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0623\u062d\u062f \u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633\u060c \u0645\u0639 \u0628\u0642\u0627\u0621 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0648\u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0641\u0639\u0651\u0627\u0644 \u0648\u0627\u0644\u0623\u0633\u0627\u0633<br \/>\n      \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0644\u0644\u0645\u0634\u0631\u0648\u0639 \u0623\u0648 \u0627\u0644\u0643\u0648\u062f \u0645\u0633\u062a\u0648\u0641\u0649. \u0647\u0630\u0627 \u0625\u0637\u0627\u0631 \u0641\u0631\u0632 \u0647\u0646\u062f\u0633\u064a \u0644\u0647\u0630\u0627 \u0627\u0644\u0645\u0642\u0627\u0644\u2014\u0648\u0644\u064a\u0633 \u062a\u0635\u0646\u064a\u0641\u064b\u0627 \u0648\u0641\u0642 API \u0623\u0648<br \/>\n      ASME.\n    <\/p>\n<p>\u0623\u0633\u0631\u0639 \u0627\u062e\u062a\u0628\u0627\u0631 \u0647\u0648 \u0627\u0633\u062a\u0628\u0639\u0627\u062f \u0623\u062d\u062f \u0635\u0645\u0627\u0645\u0627\u062a PSV \u0627\u0641\u062a\u0631\u0627\u0636\u064a\u064b\u0627 \u0645\u0646 \u0627\u0644\u062e\u062f\u0645\u0629. \u062b\u0645 \u0627\u0633\u0623\u0644:<\/p>\n<ol>\n<li>\u0645\u0627 \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062a\u064a \u0643\u0627\u0646 \u064a\u0648\u0641\u0631\u0647\u0627 \u0630\u0644\u0643 \u0627\u0644\u062c\u0647\u0627\u0632\u061f<\/li>\n<li>\u0645\u0627 \u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0624\u0647\u0644 \u0627\u0644\u0630\u064a \u0644\u0627 \u064a\u0632\u0627\u0644 \u0645\u062a\u0635\u0644\u064b\u0627\u061f<\/li>\n<li>\u0647\u0644 \u0644\u0627 \u064a\u0632\u0627\u0644 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0645\u062a\u0628\u0642\u064a \u064a\u0648\u0641\u0631 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u0644\u062d\u0627\u0644\u0629 \u0642\u064a\u062f \u0627\u0644\u062a\u0642\u064a\u064a\u0645\u061f<\/li>\n<li>\u0647\u0644 \u0645\u0633\u0627\u0631 \u0627\u0644\u062f\u062e\u0648\u0644 \u0627\u0644\u062e\u0627\u0635 \u0628\u0647 \u0644\u0627 \u064a\u0632\u0627\u0644 \u0645\u0642\u0628\u0648\u0644\u064b\u0627\u061f<\/li>\n<li>\u0647\u0644 \u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u062e\u0627\u0635 \u0628\u0647 \u0644\u0627 \u064a\u0632\u0627\u0644 \u0645\u0642\u0628\u0648\u0644\u064b\u0627\u061f<\/li>\n<li>\u0647\u0644 \u064a\u0633\u0645\u062d \u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0648\u0627\u0644\u0643\u0648\u062f \u0627\u0644\u062d\u0627\u0643\u0645 \u0628\u0630\u0644\u0643 \u0627\u0644\u0648\u0636\u0639 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a\u061f<\/li>\n<\/ol>\n<p>\n      \u0625\u0630\u0627 \u0628\u0642\u064a\u062a \u0647\u0630\u0647 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u062f\u0648\u0646 \u0625\u062c\u0627\u0628\u0629\u060c \u0641\u0625\u0646 \u0648\u062c\u0648\u062f \u0635\u0645\u0627\u0645\u064a\u0646 \u0645\u0631\u0643\u0628\u064a\u0646 \u0644\u0627 \u064a\u0643\u0641\u064a \u0644\u0644\u0627\u0633\u062a\u062f\u0644\u0627\u0644 \u0639\u0644\u0649 \u0623\u0646 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u064a\u062a\u0645\u062a\u0639 \u0628\u0627\u0644\u062a\u0643\u0631\u0627\u0631 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a.\n    <\/p>\n<p>\n      <strong>\u0645\u0634\u0627\u0631\u0643\u0629 \u0627\u0644\u0633\u0639\u0629 \u0644\u064a\u0633\u062a \u0646\u0641\u0633\u0647\u0627 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629.<\/strong> \u0625\u0630\u0627 \u0643\u0627\u0646 \u0635\u0645\u0627\u0645\u0627 PSV \u0646\u0634\u0637\u0627\u0646 \u064a\u0633\u062a\u0648\u0641\u064a\u0627\u0646 \u0645\u0639\u064b\u0627 \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u060c<br \/>\n      \u0641\u0642\u062f \u064a\u0641\u064a \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0628\u0630\u0644\u0643 \u0627\u0644\u0648\u0627\u062c\u0628 \u0639\u0646\u062f\u0645\u0627 \u064a\u0643\u0648\u0646 \u0643\u0644\u0627\u0647\u0645\u0627 \u0645\u062a\u0627\u062d\u064b\u0627\u060c \u0644\u0643\u0646\u0647 \u0644\u0627 \u064a\u0639\u0648\u062f \u064a\u0641\u064a \u0628\u0647 \u0628\u0639\u062f<br \/>\n      \u0625\u0632\u0627\u0644\u0629 \u0623\u062d\u062f \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646. \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u062d\u0627\u0644\u0629 \u062a\u0648\u062c\u062f \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u062a\u0639\u062f\u062f\u0629\u060c \u0644\u0643\u0646 \u0644\u0627 \u064a\u0648\u062c\u062f \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0645\u0633\u0627\u0631 \u0633\u0639\u0629 \u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629 \u0643\u0627\u0645\u0644.\n    <\/p>\n<p>\n      \u064a\u0645\u0643\u0646 \u0644\u062a\u0631\u062a\u064a\u0628 \u0648\u0627\u062c\u0628\/\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u0623\u0646 \u064a\u062d\u0627\u0641\u0638 \u0639\u0644\u0649 \u0645\u0633\u0627\u0631 \u0635\u0645\u0627\u0645 \u0628\u062f\u064a\u0644\u060c \u0644\u0643\u0646 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0642\u062f \u062a\u0638\u0644 \u062a\u0634\u062a\u0631\u0643 \u0641\u064a \u0648\u0635\u0644\u0629 \u0627\u0644\u0648\u0639\u0627\u0621\u060c,<br \/>\n      \u0648\u0645\u0634\u0639\u0628 \u0627\u0644\u062f\u062e\u0648\u0644\u060c \u0648\u0627\u0644\u0645\u062d\u062f\u062f\u060c \u0648\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0635\u0628\u060c \u0623\u0648 \u0631\u0623\u0633 \u062a\u0646\u0641\u064a\u0633 \u0645\u0634\u062a\u0631\u0643. \u0647\u0630\u0647 \u0627\u0644\u0639\u0646\u0627\u0635\u0631 \u0627\u0644\u0645\u0634\u062a\u0631\u0643\u0629 \u0647\u064a \u062a\u0628\u0639\u064a\u0627\u062a \u0645\u062d\u062a\u0645\u0644\u0629<br \/>\n      \u0645\u0634\u062a\u0631\u0643\u0629 \u0648\u064a\u062c\u0628 \u062a\u0636\u0645\u064a\u0646\u0647\u0627 \u0641\u064a \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u062a\u0643\u0631\u0627\u0631.\n    <\/p>\n<aside class=\"zobai-note\">\n<p>\n        <strong>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0647\u0646\u062f\u0633\u064a \u062a\u0648\u0636\u064a\u062d\u064a.<\/strong> \u064a\u0638\u0647\u0631 \u0635\u0645\u0627\u0645\u0627 PSV \u0639\u0644\u0649 \u0627\u0644\u062a\u0648\u0627\u0632\u064a \u0648\u064a\u0634\u064a\u0631 \u0641\u0631\u064a\u0642 \u0627\u0644\u0645\u0634\u0631\u0648\u0639<br \/>\n        \u0625\u0644\u064a\u0647\u0645\u0627 \u0639\u0644\u0649 \u0623\u0646\u0647\u0645\u0627 \u201c\u0645\u0643\u0631\u0631\u0627\u0646\u201d. \u063a\u064a\u0631 \u0623\u0646 \u062d\u0633\u0627\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u064a\u0639\u062a\u062f \u0628\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0634\u062a\u0631\u0643\u0629 \u0644\u0644\u0635\u0645\u0627\u0645\u064a\u0646 \u0644\u0644\u062d\u0627\u0644\u0629<br \/>\n        \u0627\u0644\u062d\u0627\u0643\u0645\u0629. \u0625\u0630\u0627 \u0623\u064f\u0632\u064a\u0644 \u0623\u062d\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u064a\u0646\u060c \u0644\u0645 \u062a\u0639\u062f \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0627\u0644\u0645\u062a\u0628\u0642\u064a\u0629 \u062a\u063a\u0637\u064a \u0630\u0644\u0643 \u0627\u0644\u0648\u0627\u062c\u0628. \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0632\u0648\u062c\u0627\u0646 \u062a\u0631\u062a\u064a\u0628\u064b\u0627 \u0635\u0627\u0644\u062d\u064b\u0627<br \/>\n        \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0644\u0644\u0633\u0639\u0629\u060c \u0644\u0643\u0646\u0647 \u0644\u064a\u0633 \u062a\u0643\u0631\u0627\u0631\u064b\u0627 \u0643\u0627\u0645\u0644\u064b\u0627 \u0644\u0644\u0633\u0639\u0629 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629 \u0644\u062a\u0644\u0643 \u0627\u0644\u062d\u0627\u0644\u0629. \u0648\u0627\u0644\u0648\u0642\u0627\u064a\u0629 \u0647\u064a<br \/>\n        \u0628\u0633\u064a\u0637: \u062d\u062f\u0651\u062f \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0628\u0627\u0642\u064a\u0629 \u0642\u0628\u0644 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0643\u0644\u0645\u0629 \u201c\u0645\u0643\u0631\u0631\u201d.\u201d\n      <\/p>\n<\/aside>\n<p>\n      <strong>\u0644\u0630\u0644\u0643 \u0641\u0625\u0646 \u0645\u0636\u0627\u0639\u0641\u0629 \u0623\u062c\u0633\u0627\u0645 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0644\u064a\u0633\u062a \u0645\u0645\u0627\u062b\u0644\u0629 \u0644\u0645\u0636\u0627\u0639\u0641\u0629 \u0645\u0633\u0627\u0631 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0628\u0627\u0644\u0643\u0627\u0645\u0644.<\/strong><br \/>\n      \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0623\u0643\u062b\u0631 \u0641\u0627\u0626\u062f\u0629 \u062d\u0648\u0644 \u0627\u0644\u062a\u0643\u0631\u0627\u0631 \u0647\u0648: <strong>\u0645\u0627 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0627\u0644\u062a\u064a \u062a\u0628\u0642\u0649 \u0628\u0639\u062f \u0641\u0642\u062f\u0627\u0646 \u062c\u0647\u0627\u0632 \u0648\u0627\u062d\u062f \u0623\u0648 \u0639\u0632\u0644\u0647\u061f<\/strong>\n    <\/p>\n<\/section>\n<section aria-labelledby=\"share-required-duty\">\n<h2 id=\"share-required-duty\">\u0639\u0646\u062f\u0645\u0627 \u064a\u0634\u062a\u0631\u0643 \u0635\u0645\u0627\u0645\u0627 PSV \u0646\u0634\u0637\u0627\u0646 \u0641\u064a \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628<\/h2>\n<p>\n      \u0639\u0646\u062f\u0645\u0627 \u064a\u064f\u062d\u062a\u0633\u0628 \u0643\u0644\u0627 \u0635\u0645\u0627\u0645\u064a PSV \u0636\u0645\u0646 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u060c \u062a\u062a\u063a\u064a\u0631 \u0645\u0633\u0623\u0644\u0629 \u0627\u0644\u062a\u0635\u0645\u064a\u0645. \u0641\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<br \/>\n      \u062a\u0623\u062a\u064a \u0645\u0646 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u061b \u0648\u0644\u0627 \u062a\u0623\u062a\u064a \u0645\u0646 \u0627\u062e\u062a\u064a\u0627\u0631 \u0635\u0645\u0627\u0645 \u0648\u0627\u062d\u062f<br \/>\n      \u0623\u0648 \u0635\u0645\u0627\u0645\u064a\u0646.\n    <\/p>\n<p class=\"translation-block\"><a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/520parti\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u0623\u0648\u0644<\/a><br>\n      \u064a\u062a\u0646\u0627\u0648\u0644 \u062d\u0633\u0627\u0628 \u0623\u062d\u062c\u0627\u0645 \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u062e\u062a\u064a\u0627\u0631\u0647\u0627\u060c \u0628\u064a\u0646\u0645\u0627<br>\n      <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/520part-ii\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a<\/a><br>\n      \u064a\u062a\u0646\u0627\u0648\u0644 \u062a\u0631\u0643\u064a\u0628\u0647\u0627.<br>\n      <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/standard521\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">API 521<\/a><br>\n      \u064a\u062a\u0646\u0627\u0648\u0644 \u0623\u0646\u0638\u0645\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u062e\u0641\u0636 \u0627\u0644\u0636\u063a\u0637 \u0639\u0644\u0649 \u0646\u0637\u0627\u0642 \u0623\u0634\u0645\u0644.<br>\n      <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/bpvc-section-xiii-rules-for-overpressure-protection\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">ASME BPVC \u0627\u0644\u0642\u0633\u0645 XIII<\/a><br>\n      \u064a\u062a\u0646\u0627\u0648\u0644 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f\u060c \u0628\u0645\u0627 \u064a\u0634\u0645\u0644 \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0642\u062f\u0631\u062a\u0647\u0627 \u0639\u0644\u0649 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0639\u062f\u0629 \u0623\u062c\u0647\u0632\u0629 \u0645\u0639\u064b\u0627 \u0648\u062a\u0631\u0643\u064a\u0628\u0647\u0627.<\/p>\n<p>\n      \u0648\u0647\u0630\u0627 \u064a\u0639\u0637\u064a \u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0627\u0644\u0635\u062d\u064a\u062d: <strong>\u0645\u0647\u0645\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u2192 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u2192 \u0645\u0633\u0627\u0647\u0645\u0629 \u0627\u0644\u0633\u0639\u0629<br \/>\n      \u0644\u0643\u0644 \u062c\u0647\u0627\u0632 \u2192 \u0623\u0633\u0627\u0633 \u0636\u0628\u0637 \u0627\u0644\u0636\u063a\u0637 \u2192 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u0631\u0643\u0628<\/strong>. \u0648\u0644\u0627 \u064a\u0628\u0631\u0631 \u0630\u0644\u0643 \u0645\u062c\u0631\u062f \u0642\u0633\u0645\u0629<br \/>\n      \u0627\u0644\u0645\u0647\u0645\u0629 \u0639\u0644\u0649 \u0639\u062f\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a.\n    <\/p>\n<div class=\"zobai-table-wrap\" role=\"region\" aria-label=\"Dual PSV capacity design questions\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">\u0633\u0624\u0627\u0644 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u064a<\/th>\n<th scope=\"col\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u0625\u062b\u0628\u0627\u062a\u0647<\/th>\n<th scope=\"col\">\u0644\u0627 \u062a\u0641\u062a\u0631\u0636<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<\/td>\n<td>\u0627\u0644\u0645\u0647\u0645\u0629 \u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0627\u0643\u0645\u0629<\/td>\n<td>\u0635\u0645\u0627\u0645\u0627\u0646 \u064a\u0639\u0646\u064a\u0627\u0646 \u0636\u0639\u0641 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<\/td>\n<\/tr>\n<tr>\n<td>\u0645\u0633\u0627\u0647\u0645\u0629 \u0627\u0644\u0633\u0639\u0629<\/td>\n<td>\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0644\u0643\u0644 \u062c\u0647\u0627\u0632<\/td>\n<td>\u062a\u0642\u0633\u064a\u0645 50\/50 \u0627\u0641\u062a\u0631\u0627\u0636\u064a\u064b\u0627<\/td>\n<\/tr>\n<tr>\n<td>\u0623\u0633\u0627\u0633 \u0636\u0628\u0637 \u0627\u0644\u0636\u063a\u0637<\/td>\n<td>\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647<\/td>\n<td>\u0643\u0644\u0627 \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646 \u064a\u062d\u062a\u0627\u062c \u062f\u0627\u0626\u0645\u064b\u0627 \u0625\u0644\u0649 \u0625\u0639\u062f\u0627\u062f\u0627\u062a \u0645\u062a\u0637\u0627\u0628\u0642\u0629<\/td>\n<\/tr>\n<tr>\n<td>\u062d\u0627\u0644\u0629 \u062a\u0639\u0630\u0631 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0623\u062d\u062f \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646<\/td>\n<td>\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u062a\u0628\u0642\u064a\u0629 \u0641\u064a \u062a\u0644\u0643 \u0627\u0644\u062d\u0627\u0644\u0629<\/td>\n<td>\u0623\u064a \u0645\u0646 \u0635\u0645\u0627\u0645\u064a PSV \u064a\u062a\u0648\u0644\u0649 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0643\u0627\u0645\u0644 \u0627\u0644\u0645\u0647\u0645\u0629<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u062a\u0631\u0643\u064a\u0628<\/td>\n<td>\u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u062f\u062e\u0644 \u0648\u0627\u0644\u0645\u062e\u0631\u062c \u0627\u0644\u0641\u0639\u0644\u064a\u0629<\/td>\n<td>\u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0635\u062d\u064a\u062d \u064a\u0636\u0645\u0646 \u0646\u0638\u0627\u0645\u064b\u0627 \u0635\u062d\u064a\u062d\u064b\u0627<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>\n      <a href=\"https:\/\/www.nationalboard.org\/SiteDocuments\/NBIC%20Restricted\/SC%20PRD%20Minutes%20with%20attachments%20July%202022.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u0645\u0627\u062f\u0629 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0639\u0627\u0645\u0629 \u0627\u0644\u0635\u0627\u062f\u0631\u0629 \u0639\u0646 National Board<\/a><br \/>\n      \u064a\u0645\u064a\u0651\u0632 \u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0627\u062a \u0627\u0644\u062a\u064a \u064a\u064f\u0632\u0648\u064e\u0651\u062f \u0641\u064a\u0647\u0627 \u0628\u0623\u0643\u062b\u0631 \u0645\u0646 \u062c\u0647\u0627\u0632 PRD \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629. \u0643\u0645\u0627 \u064a\u0639\u0643\u0633<br \/>\n      \u0623\u0646 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0625\u0636\u0627\u0641\u064a\u0629 \u0642\u062f \u062a\u062e\u0636\u0639 \u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0645\u062e\u062a\u0644\u0641\u0629 \u0645\u0633\u0645\u0648\u062d \u0628\u0647\u0627 \u0644\u0625\u0639\u062f\u0627\u062f \u0627\u0644\u0636\u063a\u0637 \u0648\u0641\u0642<br \/>\n      \u0623\u0633\u0627\u0633 \u0627\u0644\u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647. \u0648\u0644\u0627 \u062a\u0632\u0627\u0644 \u0627\u0644\u062d\u062f\u0648\u062f \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u062a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u062d\u0627\u0643\u0645 \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639.\n    <\/p>\n<p>\n      <strong>\u0644\u0627 \u062a\u0641\u062a\u0631\u0636 \u062a\u0642\u0633\u064a\u0645 \u0627\u0644\u0633\u0639\u0629 \u0628\u0646\u0633\u0628\u0629 50\/50.<\/strong> \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u0645\u062a\u0633\u0627\u0648\u064a \u0646\u062a\u064a\u062c\u0629 \u0644\u062a\u0635\u0645\u064a\u0645 \u0645\u0639\u064a\u0646\u060c,<br \/>\n      \u0648\u0644\u0643\u0646 \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0647 \u0643\u0642\u0627\u0639\u062f\u0629 \u0647\u0646\u062f\u0633\u064a\u0629 \u0627\u0641\u062a\u0631\u0627\u0636\u064a\u0629. \u0648\u0628\u0627\u0644\u0645\u062b\u0644\u060c \u0644\u0627 \u062a\u0641\u062a\u0631\u0636 \u0623\u0646 \u0623\u064a\u064b\u0627 \u0645\u0646 \u0627\u0644\u0635\u0645\u0627\u0645\u064a\u0646 \u0645\u0635\u0645\u0645 \u0628\u0634\u0643\u0644 \u0641\u0631\u062f\u064a<br \/>\n      \u0644\u0633\u0639\u0629 \u0627\u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u062d\u0627\u0643\u0645\u0629 \u0627\u0644\u0643\u0627\u0645\u0644\u0629 \u0645\u0627 \u0644\u0645 \u064a\u0643\u0646 \u0630\u0644\u0643 \u062c\u0632\u0621\u064b\u0627 \u0641\u0639\u0644\u064a\u064b\u0627 \u0645\u0646 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0635\u0645\u064a\u0645.\n    <\/p>\n<p>\n      \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0648\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0648\u0627\u0644\u062a\u0631\u0627\u0643\u0645 \u0648\u0627\u0644\u0627\u0646\u062e\u0641\u0627\u0636 \u0647\u064a \u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0645\u062a\u0631\u0627\u0628\u0637\u0629 \u0644\u0643\u0646\u0647\u0627 \u0645\u062e\u062a\u0644\u0641\u0629. \u064a\u062d\u062f\u062f \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637<br \/>\n      \u0636\u063a\u0637 \u0627\u0644\u062f\u062e\u0644 \u0627\u0644\u0645\u062d\u062f\u062f \u0627\u0644\u0645\u0631\u062a\u0628\u0637 \u0628\u062e\u0627\u0635\u064a\u0629 \u0627\u0644\u0641\u062a\u062d \u0627\u0644\u0645\u062d\u062f\u062f\u0629 \u0644\u0644\u0635\u0645\u0627\u0645\u061b \u0648\u064a\u0635\u0641 \u0627\u0644\u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u0641\u0631\u0642<br \/>\n      \u0628\u064a\u0646 \u0636\u063a\u0637 \u0627\u0644\u0641\u062a\u062d \u0648\u0636\u063a\u0637 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u0625\u063a\u0644\u0627\u0642. \u0641\u064a \u062a\u0631\u062a\u064a\u0628 \u0645\u062a\u0639\u062f\u062f \u0627\u0644\u0623\u062c\u0647\u0632\u0629\u060c \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u062f\u0645\u062c \u0647\u0630\u0647 \u0627\u0644\u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0641\u064a<br \/>\n      \u201c\u0647\u0627\u0645\u0634\u201d \u0648\u0627\u062d\u062f \u0623\u0648 \u0646\u0633\u0628\u0629 \u0645\u0626\u0648\u064a\u0629 \u0645\u0648\u062d\u062f\u0629 \u0648\u0627\u062d\u062f\u0629. \u064a\u062d\u062f\u062f \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647 \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0627\u0644\u0639\u0644\u0627\u0642\u0627\u062a \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647\u0627.<br \/>\n      \u062a\u0646\u062a\u0645\u064a \u0627\u0644\u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a\u0629 \u0625\u0644\u0649 \u062f\u0644\u064a\u0644 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0631\u062a\u0628\u0637 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0625\u0639\u0627\u062f\u0629 \u0625\u0646\u0634\u0627\u0626\u0647\u0627 \u0647\u0646\u0627.\n    <\/p>\n<p>\n      \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0631\u0643\u0628\u0629 \u0648\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0623\u064a\u0636\u064b\u0627 \u0633\u0624\u0627\u0644\u0627\u0646 \u0645\u062e\u062a\u0644\u0641\u0627\u0646. \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0643\u0648\u0646 \u0644\u062f\u0649 \u0627\u0644\u0646\u0638\u0627\u0645 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u0631\u0643\u0628\u0629<br \/>\n      \u0623\u0643\u0628\u0631 \u0645\u0646 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062a\u064a \u062a\u062a\u0637\u0644\u0628\u0647\u0627 \u0627\u0644\u062e\u062f\u0645\u0629\u060c \u0623\u0648 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0634\u062a\u0631\u0643\u0629 \u0644\u062c\u0647\u0627\u0632\u064a\u0646 \u0644\u062a\u0644\u0628\u064a\u0629 \u062a\u0644\u0643 \u0627\u0644\u0633\u0639\u0629. \u0623\u062f\u0644\u0629<br \/>\n      \u0627\u0644\u0633\u0639\u0629 \u0623\u0647\u0645 \u0645\u0646 \u062d\u062c\u0645 \u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0627\u0644\u0627\u0633\u0645\u064a: \u0633\u062c\u0644<br \/>\n      <a href=\"https:\/\/www.nationalboard.org\/Index.aspx?pageID=64\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">NB-18 \u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637<\/a><br \/>\n      \u0627\u0644\u0648\u0637\u0646\u064a \u0645\u0648\u062c\u0648\u062f \u062a\u062d\u062f\u064a\u062f\u064b\u0627 \u0644\u062c\u0639\u0644 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062c\u0647\u0627\u0632\/\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u062a\u0628\u0639 \u0644\u0644\u062a\u0635\u0627\u0645\u064a\u0645 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627.\n    <\/p>\n<aside class=\"zobai-note\">\n<p>\n        <strong>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0647\u0646\u062f\u0633\u064a \u062a\u0648\u0636\u064a\u062d\u064a.<\/strong> \u0645\u0634\u0631\u0648\u0639 \u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u064a\u062d\u0627\u0641\u0638 \u0639\u0644\u0649 \u0646\u0641\u0633 \u0645\u0642\u0627\u0633 \u0641\u0644\u0646\u062c\u0629 \u0627\u0644\u062f\u062e\u0648\u0644 \u0648\u064a\u0641\u062a\u0631\u0636<br \/>\n        \u0623\u0646 \u0635\u0645\u0627\u0645 PSV \u0627\u0644\u0628\u062f\u064a\u0644 \u0644\u0647 \u0646\u0641\u0633 \u0642\u062f\u0631\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062a\u064a \u064a\u062a\u0645\u062a\u0639 \u0628\u0647\u0627 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0633\u0627\u0628\u0642. \u0627\u0644\u0627\u062a\u0635\u0627\u0644 \u0645\u0646\u0627\u0633\u0628\u060c \u0644\u0643\u0646 \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629<br \/>\n        \u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0644\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0645\u062e\u062a\u0627\u0631 \u0644\u064a\u0633\u062a \u0647\u064a \u0646\u0641\u0633\u0647\u0627. \u0627\u0644\u0648\u0642\u0627\u064a\u0629 \u062a\u0643\u0645\u0646 \u0641\u064a \u0645\u0642\u0627\u0631\u0646\u0629 \u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628<br \/>\n        \u0645\u0639 \u0623\u0633\u0627\u0633 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0648\u062b\u0642 \u0644\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u062f\u0642\u064a\u0642 - \u0648\u0644\u064a\u0633 \u0645\u0639 \u062d\u062c\u0645 \u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0648\u062d\u062f\u0647.\n      <\/p>\n<\/aside>\n<p>\n      \u0644\u0644\u0627\u0637\u0644\u0627\u0639 \u0639\u0644\u0649 \u0633\u064a\u0631 \u0639\u0645\u0644 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a\u060c \u0631\u0627\u062c\u0639<br \/>\n      <a href=\"https:\/\/zobai.com\/ar\/blog\/safety-valve-sizing-and-certified-relieving-capacity-guide\/\">\u062f\u0644\u064a\u0644 \u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629<\/a>.\n    <\/p>\n<\/section>\n<section aria-labelledby=\"duty-standby-maintenance\">\n<h2 id=\"duty-standby-maintenance\">\u0639\u0646\u062f\u0645\u0627 \u064a\u063a\u064a\u0651\u0631 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\/\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0639\u0632\u0644 \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629<\/h2>\n<p>\n      \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\/\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u064a\u062d\u0644 \u0645\u0634\u0643\u0644\u0629 \u0645\u062e\u062a\u0644\u0641\u0629. \u064a\u064f\u0642\u0635\u062f \u0628\u0640 PSV \u0627\u0644\u062b\u0627\u0646\u064a \u0627\u0644\u062d\u0641\u0627\u0638 \u0639\u0644\u0649 \u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633<br \/>\n      \u0645\u062a\u0627\u062d \u0628\u064a\u0646\u0645\u0627 \u064a\u062a\u0645 \u0641\u062d\u0635 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0622\u062e\u0631 \u0623\u0648 \u0635\u064a\u0627\u0646\u062a\u0647 \u0623\u0648 \u0625\u062e\u0631\u0627\u062c\u0647 \u0645\u0646 \u0627\u0644\u062e\u062f\u0645\u0629 \u0628\u0623\u064a \u0637\u0631\u064a\u0642\u0629 \u0623\u062e\u0631\u0649. \u0644\u0630\u0644\u0643 \u064a\u0646\u062a\u0642\u0644 \u0633\u0624\u0627\u0644 \u0627\u0644\u062a\u0635\u0645\u064a\u0645<br \/>\n      \u0645\u0646 \u062a\u0642\u0627\u0633\u0645 \u0627\u0644\u0633\u0639\u0629 \u0625\u0644\u0649 <strong>\u0625\u062f\u0627\u0631\u0629 \u0645\u0633\u0627\u0631 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u062e\u0644\u0627\u0644 \u062d\u0627\u0644\u0627\u062a \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0645\u062e\u062a\u0644\u0641\u0629<\/strong>.\n    <\/p>\n<p>\n      \u062a\u0648\u062c\u062f \u0623\u0646\u0638\u0645\u0629 \u0627\u062e\u062a\u064a\u0627\u0631 \u062a\u062c\u0627\u0631\u064a\u0629 \u062a\u062d\u062f\u064a\u062f\u064b\u0627 \u0644\u0644\u062a\u0628\u062f\u064a\u0644 \u0628\u064a\u0646 PRD \u0646\u0634\u0637 \u0648\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u0645\u0639 \u0627\u0644\u062d\u0641\u0627\u0638 \u0639\u0644\u0649<br \/>\n      \u0645\u0633\u0627\u0631 \u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f. \u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c,<br \/>\n      <a href=\"https:\/\/www.emerson.com\/en\/final-control\/products\/anderson-greenwood-ssv\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u062a\u0648\u062b\u0642 Emerson \u0647\u0630\u0647 \u0627\u0644\u0628\u0646\u064a\u0629<\/a><br \/>\n      \u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0647\u0627. \u064a\u0648\u0636\u062d \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644 \u0623\u0646 \u0627\u0644\u0628\u0646\u064a\u0629 \u0645\u0648\u062c\u0648\u062f\u0629\u061b \u0644\u0643\u0646\u0647 \u0644\u0627 \u064a\u062b\u0628\u062a \u0623\u0646 \u0643\u0644 \u0635\u0645\u0627\u0645\u064e\u064a PSV<br \/>\n      \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0645\u0642\u0628\u0648\u0644 \u0644\u0644\u0635\u064a\u0627\u0646\u0629 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u0634\u063a\u064a\u0644.\n    <\/p>\n<p><strong>\u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0639\u0627\u062f\u064a.<\/strong> \u062d\u062f\u062f \u0623\u064a PSV \u0646\u0634\u0637 \u0648\u0645\u0633\u0627\u0631 \u0627\u0644\u062f\u062e\u0648\u0644 \u0648\u0627\u0644\u062e\u0631\u0648\u062c \u0627\u0644\u0643\u0627\u0645\u0644 \u0627\u0644\u0630\u064a \u064a\u0631\u0627\u0647.<\/p>\n<p>\n      <strong>\u0627\u0644\u062a\u0628\u062f\u064a\u0644.<\/strong> \u062d\u062f\u062f \u0643\u064a\u0641\u064a\u0629 \u0627\u0646\u062a\u0642\u0627\u0644 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u062c\u0647\u0627\u0632 \u0625\u0644\u0649 \u0622\u062e\u0631\u060c \u0648\u0643\u064a\u0641 \u064a\u062a\u0645 \u0627\u0644\u062a\u0639\u0631\u0641 \u0639\u0644\u0649 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0646\u0634\u0637<br \/>\n      \u0628\u0634\u0643\u0644 \u0645\u0624\u0643\u062f\u060c \u0648\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062e\u0644\u0642 \u062d\u0627\u0644\u0629 \u063a\u064a\u0631 \u0645\u0642\u0628\u0648\u0644\u0629.\n    <\/p>\n<p>\n      <strong>\u0627\u0644\u0635\u064a\u0627\u0646\u0629.<\/strong> \u0628\u0639\u062f \u0639\u0632\u0644 \u0623\u062d\u062f \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646\u060c \u062a\u062d\u0642\u0642 \u0645\u0646 \u0623\u0646 \u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0646\u0634\u0637 \u0627\u0644\u0645\u062a\u0628\u0642\u064a \u0644\u0627 \u064a\u0632\u0627\u0644 \u064a\u0624\u062f\u064a<br \/>\n      \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0648\u0643\u0644\u0629 \u0625\u0644\u064a\u0647. \u064a\u0634\u0645\u0644 \u0647\u0630\u0627 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0646\u0634\u0637 \u0648\u0645\u0633\u0627\u0631 \u0627\u0644\u0645\u062d\u062f\u062f\/\u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0641\u0642\u062f\u0627\u0646 \u0636\u063a\u0637 \u0627\u0644\u062f\u062e\u0648\u0644<br \/>\n      \u0648\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0635\u0631\u064a\u0641\u2014\u0648\u0644\u064a\u0633 \u0645\u062c\u0631\u062f \u0648\u062c\u0648\u062f \u0635\u0645\u0627\u0645 \u062b\u0627\u0646\u064d \u0645\u0627\u062f\u064a\u064b\u0627.\n    <\/p>\n<p>\n      <strong>\u0627\u0644\u0639\u0648\u062f\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u062f\u0645\u0629.<\/strong> \u062a\u0623\u0643\u062f \u0645\u0646 \u0643\u064a\u0641\u064a\u0629 \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0630\u064a \u062a\u0645\u062a \u0635\u064a\u0627\u0646\u062a\u0647 \u062f\u0648\u0646 \u0625\u0646\u0634\u0627\u0621 \u0635\u0645\u0627\u0645 \u063a\u064a\u0631 \u0645\u0642\u0635\u0648\u062f<br \/>\n      \u0623\u0648 \u062d\u0627\u0644\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u0648\u0627\u0644\u062a\u0623\u0643\u062f \u0645\u0646 \u0627\u0643\u062a\u0645\u0627\u0644 \u0633\u062c\u0644\u0627\u062a \u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0648\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631\/\u0627\u0644\u0636\u0628\u0637 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0642\u0628\u0644 \u0623\u0646 \u064a\u062a\u0645<br \/>\n      \u0627\u0639\u062a\u0645\u0627\u062f \u0627\u0644\u062c\u0647\u0627\u0632 \u0645\u0631\u0629 \u0623\u062e\u0631\u0649.\n    <\/p>\n<p>\n      \u062a\u062c\u0639\u0644 \u0647\u0630\u0647 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0645\u062d\u062f\u0650\u0651\u062f \u0623\u0648 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0639\u0632\u0644 \u062c\u0632\u0621\u064b\u0627 \u0645\u0646 \u062a\u0635\u0645\u064a\u0645 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0644\u064a\u0633 \u0645\u0644\u062d\u0642\u064b\u0627 \u062b\u0627\u0646\u0648\u064a\u064b\u0627 \u0644\u0644\u0623\u0646\u0627\u0628\u064a\u0628.<br \/>\n      <a href=\"https:\/\/www.nationalboard.org\/SiteDocuments\/NBIC%20Restricted\/SC%20PRD%20Minutes%20with%20attachments%20July%202022.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u0625\u0631\u0634\u0627\u062f\u0627\u062a PRD \u0627\u0644\u0639\u0627\u0645\u0629 \u0627\u0644\u0635\u0627\u062f\u0631\u0629 \u0639\u0646 National Board<\/a><br \/>\n      \u062a\u0648\u0636\u062d \u0627\u0639\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u062a\u0631\u062a\u064a\u0628\u0627\u062a \u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0627\u0644\u0639\u0632\u0644\u060c \u0628\u064a\u0646\u0645\u0627<br \/>\n      <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/520part-ii\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a<\/a><br \/>\n      \u062a\u062a\u0646\u0627\u0648\u0644 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644 \u062a\u0631\u0643\u064a\u0628 PRD.\n    <\/p>\n<p>\n      \u062a\u062a\u0636\u0645\u0646 <a href=\"https:\/\/www.nationalboard.org\/OrderTheNBIC.aspx\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u0637\u0628\u0639\u0629 NBIC \u0627\u0644\u062d\u0627\u0644\u064a\u0629<\/a><br \/>\n      \u062c\u0632\u0621\u064b\u0627 \u0645\u062e\u0635\u0635\u064b\u0627 (Part 4) \u0644\u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637. \u0648\u0645\u0648\u0627\u062f \u0627\u0644\u0644\u062c\u0627\u0646 \u0627\u0644\u0639\u0627\u0645\u0629 \u0645\u0641\u064a\u062f\u0629 \u0644\u0641\u0647\u0645<br \/>\n      \u0627\u0644\u0627\u0639\u062a\u0628\u0627\u0631 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u060c \u0644\u0643\u0646\u0647\u0627 \u0644\u064a\u0633\u062a \u0628\u062f\u064a\u0644\u064b\u0627 \u0639\u0646 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0627\u0644\u062d\u0627\u0644\u064a \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0627\u0644\u0643 \u0648\u0645\u0648\u0627\u0635\u0641\u0627\u062a<br \/>\n      \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0648\u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u0642\u0636\u0627\u0626\u064a\u0629 \u0627\u0644\u0645\u062e\u062a\u0635\u0629 \u0642\u0628\u0644 \u0642\u0628\u0648\u0644 \u062a\u0631\u062a\u064a\u0628 \u0642\u0627\u0628\u0644 \u0644\u0644\u0639\u0632\u0644 \u0623\u0648 \u062a\u0631\u062a\u064a\u0628 \u062a\u0628\u062f\u064a\u0644.\n    <\/p>\n<aside class=\"zobai-note\">\n<p>\n        \u064a\u0645\u0643\u0646 \u0644\u062a\u0631\u062a\u064a\u0628 \u062a\u0634\u063a\u064a\u0644\/\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u0623\u0646 \u064a\u062f\u0639\u0645 \u0635\u064a\u0627\u0646\u0629 \u0623\u062d\u062f \u0635\u0645\u0627\u0645\u0627\u062a PSV \u0628\u064a\u0646\u0645\u0627 \u064a\u0638\u0644 \u0627\u0644\u0622\u062e\u0631 \u0641\u0639\u0627\u0644\u064b\u0627<br \/>\n        <strong>\u0639\u0646\u062f\u0645\u0627 \u064a\u062d\u0627\u0641\u0638 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0648\u062a\u064f\u0633\u062a\u0648\u0641\u0649 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0631\u0643\u064a\u0628<br \/>\n        \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627<\/strong>. \u0643\u0645\u0627 \u0623\u0646 API RP 576 \u0648\u062b\u064a\u0642 \u0627\u0644\u0635\u0644\u0629 \u0628\u0645\u0645\u0627\u0631\u0633\u0627\u062a \u0627\u0644\u0641\u062d\u0635 \u0648\u0627\u0644\u0625\u0635\u0644\u0627\u062d\u061b \u0648\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0623\u0646 \u064a\u064f\u0642\u0631\u0623 \u062e\u0637\u0623\u064b<br \/>\n        \u0639\u0644\u0649 \u0623\u0646\u0647 \u064a\u0646\u0634\u0626 \u0641\u062a\u0631\u0629 \u0641\u062d\u0635 \u0645\u0648\u062d\u062f\u0629 \u0648\u0627\u062d\u062f\u0629 \u0644\u0643\u0644 \u062e\u062f\u0645\u0629.\n      <\/p>\n<\/aside>\n<aside class=\"zobai-note\">\n<p>\n        <strong>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0647\u0646\u062f\u0633\u064a \u062a\u0648\u0636\u064a\u062d\u064a.<\/strong> \u062a\u0642\u0648\u0645 \u0625\u062d\u062f\u0649 \u0627\u0644\u0645\u0646\u0634\u0622\u062a \u0628\u062a\u0631\u0643\u064a\u0628 \u0645\u064f\u062d\u062f\u0650\u0651\u062f \u0648\u0635\u0645\u0627\u0645\u064e\u064a PSV \u0628\u062d\u064a\u062b \u064a\u0645\u0643\u0646 \u0635\u064a\u0627\u0646\u0629 \u0623\u062d\u062f \u0627\u0644\u0635\u0645\u0627\u0645\u064a\u0646<br \/>\n        \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u0634\u063a\u064a\u0644. \u062a\u0631\u0643\u0632 \u062e\u0637\u0629 \u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0639\u0644\u0649 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a \u0644\u0643\u0646\u0647\u0627 \u0644\u0627 \u062a\u062a\u062d\u0642\u0642 \u0645\u0646 \u0645\u0648\u0636\u0639 \u0627\u0644\u0645\u064f\u062d\u062f\u0650\u0651\u062f \u0648\u0645\u0633\u0627\u0631<br \/>\n        \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0646\u0634\u0637 \u0628\u0639\u062f \u0627\u0644\u0639\u0645\u0644. \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0642\u0635\u062f \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u064a \u0633\u0644\u064a\u0645\u064b\u0627\u060c \u0648\u0645\u0639 \u0630\u0644\u0643 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0643\u0648\u0646 \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u062e\u0627\u0637\u0626\u0629. \u0627\u0644\u0648\u0642\u0627\u064a\u0629 \u0647\u064a<br \/>\n        \u062c\u0639\u0644 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0646\u0634\u0637 \u0648\u0645\u0648\u0636\u0639 \u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0641\u062d\u0635 \u0627\u0644\u0639\u0648\u062f\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u062f\u0645\u0629 \u0623\u062c\u0632\u0627\u0621\u064b \u0635\u0631\u064a\u062d\u0629 \u0641\u064a \u0627\u0644\u0625\u062c\u0631\u0627\u0621<br \/>\n        \u0627\u0644\u0645\u0639\u062a\u0645\u062f \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u0641\u062d\u0635.\n      <\/p>\n<\/aside>\n<p>\n      \u064a\u0645\u0643\u0646 \u0644\u0644\u0642\u0631\u0627\u0621 \u0627\u0644\u0630\u064a\u0646 \u0623\u0643\u062f\u0648\u0627 \u0628\u0627\u0644\u0641\u0639\u0644 \u0623\u0646\u0647\u0645 \u0628\u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u0628\u0646\u064a\u0629 \u0627\u0644\u062e\u062f\u0645\u0629\/\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637 \u0623\u0646 \u064a\u0646\u062a\u0642\u0644\u0648\u0627 \u0625\u0644\u0649<br \/>\n      <a href=\"https:\/\/zobai.com\/ar\/safety-valves\/dual-safety-valves\/\">\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0645\u0632\u062f\u0648\u062c\u0629<\/a> \u0648<br \/>\n      <a href=\"https:\/\/zobai.com\/ar\/safety-valves\/changeover-safety-valves\/\">\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0645\u0627\u0646 \u0644\u0644\u062a\u0628\u062f\u064a\u0644<\/a><br \/>\n      \u0645\u0627\u0644\u0643\u0648 \u0627\u0644\u0645\u0646\u062a\u062c \u0644\u0645\u0631\u062d\u0644\u0629 \u0627\u0644\u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u062a\u062c\u0627\u0631\u064a.\n    <\/p>\n<figure class=\"wp-block-image size-full zobai-figure\" data-image-slot=\"IMG-02\"><img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02.webp\" alt=\"\u062d\u0627\u0644\u0627\u062a PSV \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u064a\u0629 \u0644\u0644\u0627\u062d\u062a\u064a\u0627\u0637 \u0648\u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0639\u0627\u062f\u064a \u0648\u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0648\u0627\u0644\u0639\u0648\u062f\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u062f\u0645\u0629.\" title=\"Single PSV vs Dual PSV: When Redundancy Changes the Relief Design - IMG-02\" width=\"1200\" height=\"900\" class=\"wp-image-56942\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-02-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u062d\u0627\u0644\u0627\u062a PSV \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u064a\u0629 \u0644\u0644\u0627\u062d\u062a\u064a\u0627\u0637 \u0648\u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0639\u0627\u062f\u064a \u0648\u0627\u0644\u062a\u0628\u062f\u064a\u0644 \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0648\u0627\u0644\u0639\u0648\u062f\u0629 \u0625\u0644\u0649 \u0627\u0644\u062e\u062f\u0645\u0629.<\/figcaption><\/figure>\n<\/section>\n<section aria-labelledby=\"shared-piping\">\n<h2 id=\"shared-piping\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u063a\u064a\u0651\u0631\u0647 \u062e\u0637 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0644\u0644\u0633\u062d\u0628 \u0648\u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0641\u064a \u0646\u0638\u0627\u0645 PSV \u0645\u0632\u062f\u0648\u062c<\/h2>\n<p>\n      \u0635\u0645\u0627\u0645\u0627 PSV \u0645\u0646\u0641\u0635\u0644\u0627\u0646 \u0644\u064a\u0633\u0627 \u0628\u0627\u0644\u0636\u0631\u0648\u0631\u0629 \u0645\u0633\u0627\u0631\u064a \u062d\u0645\u0627\u064a\u0629 \u0645\u0633\u062a\u0642\u0644\u064a\u0646 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u064b\u0627. \u0648\u064a\u062a\u0636\u062d \u0630\u0644\u0643 \u0639\u0646\u062f\u0645\u0627<br \/>\n      \u064a\u062a\u0634\u0627\u0631\u0643\u0627\u0646 \u062e\u0637 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0639\u0644\u0648\u064a \u0623\u0648 \u0627\u0644\u0633\u0641\u0644\u064a.\n    <\/p>\n<h3>\u0627\u0644\u0633\u062d\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0623\u0648 \u0627\u0644\u0645\u0634\u0639\u0628<\/h3>\n<p>\n      \u0644\u0627 \u064a\u0645\u0643\u0646 \u062f\u0627\u0626\u0645\u064b\u0627 \u062a\u0642\u064a\u064a\u0645 \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0645\u0631\u0643\u0628\u0629 \u0639\u0644\u0649 \u0645\u0634\u0639\u0628 \u0633\u062d\u0628 \u0645\u0634\u062a\u0631\u0643 \u0645\u0646 \u062e\u0644\u0627\u0644 \u062a\u062d\u0644\u064a\u0644 \u0635\u0645\u0627\u0645 \u0648\u0627\u062d\u062f<br \/>\n      \u0648\u0646\u0633\u062e \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0628\u0628\u0633\u0627\u0637\u0629 \u0625\u0644\u0649 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0623\u062e\u0631\u0649. \u062f\u0631\u0627\u0633\u0629 \u0645\u062d\u0643\u0651\u0645\u0629 \u0641\u064a<br \/>\n      <a href=\"https:\/\/aiche.onlinelibrary.wiley.com\/doi\/10.1002\/prs.12235\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Process Safety Progress \u0644\u0645\u0634\u0639\u0628\u0627\u062a \u0627\u0644\u0633\u062d\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643\u0629<\/a><br \/>\n      \u062a\u064f\u0646\u0645\u0630\u062c \u0627\u0644\u062a\u062f\u0641\u0642 \u0639\u0628\u0631 \u0643\u0644 \u062c\u0647\u0627\u0632 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0639\u0644\u0649 \u0627\u062e\u062a\u0635\u0627\u0631 \u062c\u0647\u0627\u0632 \u0648\u0627\u062d\u062f.\n    <\/p>\n<p>\n      \u0639\u0646\u062f\u0645\u0627 \u064a\u0645\u0643\u0646 \u0644\u0623\u0643\u062b\u0631 \u0645\u0646 \u0635\u0645\u0627\u0645 PSV \u0623\u0646 \u064a\u062a\u062f\u0641\u0642 \u0639\u0628\u0631 \u0633\u062d\u0628 \u0645\u0634\u062a\u0631\u0643\u060c, <strong>\u0641\u0625\u0646 \u0627\u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u0629 \u0644\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0641\u0639\u0644\u064a\u0629<br \/>\n      \u064a\u062c\u0628 \u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u062a\u0631\u062a\u064a\u0628<\/strong>. \u0648\u0647\u0630\u0627 \u064a\u0639\u0646\u064a \u0627\u0644\u0646\u0638\u0631 \u0625\u0644\u0649 \u0627\u0644\u0627\u062a\u0635\u0627\u0644 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0648\u0627\u0644\u0645\u062c\u0645\u0639 \u0648\u0627\u0644\u0641\u0631\u0648\u0639<br \/>\n      \u0627\u0644\u0641\u0631\u062f\u064a\u0629 \u0643\u0646\u0638\u0627\u0645 \u0633\u062d\u0628 \u0645\u0634\u062a\u0631\u0643 \u0648\u0627\u062d\u062f \u0645\u0631\u0643\u0651\u0628.\n    <\/p>\n<p>\n      \u0627\u0644\u0645\u062c\u0645\u0639 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 \u0644\u064a\u0633 \u063a\u064a\u0631 \u0645\u0642\u0628\u0648\u0644 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627. \u0627\u0644\u0646\u0642\u0637\u0629 \u0627\u0644\u0645\u0647\u0645\u0629 \u0647\u064a \u0623\u0646 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0645\u0642\u062a\u0631\u0646\u0629 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u064b\u0627<br \/>\n      \u0639\u0628\u0631 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0645\u0634\u062a\u0631\u0643. \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062b\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0633\u062d\u0628 \u0639\u0644\u0649 \u0627\u0633\u062a\u0642\u0631\u0627\u0631 \u0648\u0623\u062f\u0627\u0621 PRD\u060c \u0644\u0630\u0627 \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0630\u064a \u0643\u0627\u0646 \u0645\u0642\u0628\u0648\u0644\u064b\u0627<br \/>\n      \u0644\u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u062d\u062f \u0633\u064a\u0638\u0644 \u0645\u0642\u0628\u0648\u0644\u064b\u0627 \u0628\u0639\u062f \u0625\u0636\u0627\u0641\u0629 \u0645\u0633\u0627\u0631 \u0646\u0634\u0637 \u062b\u0627\u0646\u064d.\n    <\/p>\n<p>\n      \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u0644\u0633\u0624\u0627\u0644 \u0641\u0642\u0637 \u0639\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0643\u0644 PSV \u0643\u0628\u064a\u0631\u064b\u0627 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a\u060c \u064a\u062d\u062a\u0627\u062c \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0623\u064a\u0636\u064b\u0627 \u0625\u0644\u0649 \u062a\u062d\u062f\u064a\u062f \u0638\u0631\u0648\u0641 \u0627\u0644\u0633\u062d\u0628<br \/>\n      \u0627\u0644\u062a\u064a \u064a\u0631\u0627\u0647\u0627 \u0643\u0644 \u062c\u0647\u0627\u0632 \u0641\u0639\u0644\u064a\u064b\u0627 \u0641\u064a \u0625\u0637\u0627\u0631 \u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0639\u062a\u0628\u0631.\n    <\/p>\n<h3>\u0645\u062c\u0645\u0639 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0634\u062a\u0631\u0643<\/h3>\n<p>\n      \u064a\u0646\u0637\u0628\u0642 \u0627\u0644\u0645\u0628\u062f\u0623 \u0646\u0641\u0633\u0647 \u0639\u0644\u0649 \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0641\u0644\u064a. \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0639\u062f\u0629 \u0635\u0645\u0627\u0645\u0627\u062a PSV \u062a\u0635\u0631\u0651\u0641 \u0625\u0644\u0649 \u0645\u062c\u0645\u0639 \u0645\u0634\u062a\u0631\u0643 \u0645\u063a\u0644\u0642\u060c \u0641\u0625\u0646 \u062a\u062f\u0641\u0642\u0627\u062a\u0647\u0627 \u062a\u0633\u0627\u0647\u0645<br \/>\n      \u0641\u064a \u0628\u064a\u0626\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0633\u0641\u0644\u064a.<br \/>\n      <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/standard521\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">API 521<\/a><br \/>\n      \u064a\u062a\u0646\u0627\u0648\u0644 \u0623\u0646\u0638\u0645\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u062a\u062e\u0641\u064a\u0641 \u0627\u0644\u0636\u063a\u0637 \u0639\u0644\u0649 \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0646\u0638\u0627\u0645 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639\u0647\u0627 \u0643\u0635\u0645\u0627\u0645\u0627\u062a \u0645\u0646\u0641\u0635\u0644\u0629.\n    <\/p>\n<p>\n      \u0648\u0628\u0627\u0644\u062a\u0627\u0644\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u0623\u062e\u0630 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0647\u064a\u062f\u0631 \u0641\u064a \u0627\u0644\u0627\u0639\u062a\u0628\u0627\u0631 <strong>\u0627\u0644\u0645\u0632\u064a\u062c \u0627\u0644\u0645\u0648\u062b\u0648\u0642 \u0645\u0646 \u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/strong>, \u0648\u0644\u064a\u0633 \u0641\u0642\u0637<br \/>\n      \u062d\u062c\u0645 \u0645\u062e\u0631\u062c \u0635\u0645\u0627\u0645 \u0648\u0627\u062d\u062f. \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0627\u0644\u0645\u062a\u0631\u0627\u0643\u0645 \u0647\u0648 \u0646\u062a\u064a\u062c\u0629 \u0646\u0638\u0627\u0645\u060c \u0648\u064a\u0639\u062a\u0645\u062f \u062a\u0623\u062b\u064a\u0631\u0647 \u0639\u0644\u0649 PRV \u0627\u0644\u0645\u062e\u062a\u0627\u0631 \u0639\u0644\u0649<br \/>\n      \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0641\u0639\u0644\u064a\u0629. \u0644\u0630\u0644\u0643 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062f\u064a \u062a\u063a\u064a\u064a\u0631 \u0641\u064a \u0627\u0644\u0647\u064a\u062f\u0631 \u0625\u0644\u0649 \u0625\u0639\u0627\u062f\u0629 \u0641\u062d\u0635 \u0643\u0644 \u0645\u0646<br \/>\n      \u062d\u0633\u0627\u0628 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0648\u0645\u0644\u0627\u0621\u0645\u0629 \u0627\u0644\u0635\u0645\u0627\u0645.\n    <\/p>\n<aside class=\"zobai-note\">\n<p>\n        <strong>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0647\u0646\u062f\u0633\u064a \u062a\u0648\u0636\u064a\u062d\u064a.<\/strong> \u064a\u062a\u0645 \u0644\u0627\u062d\u0642\u064b\u0627 \u062a\u0648\u0633\u064a\u0639 \u0647\u064a\u062f\u0631 \u062a\u0635\u0631\u064a\u0641 \u0645\u0634\u062a\u0631\u0643 \u0644\u0627\u0633\u062a\u064a\u0639\u0627\u0628<br \/>\n        \u0645\u0635\u0627\u062f\u0631 \u062a\u0646\u0641\u064a\u0633 \u0625\u0636\u0627\u0641\u064a\u0629. \u0644\u0645 \u062a\u062a\u063a\u064a\u0631 \u0636\u063a\u0648\u0637 \u0636\u0628\u0637 PSV \u0627\u0644\u0623\u0635\u0644\u064a\u0629\u060c \u0644\u0643\u0646 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646 \u0627\u0644\u0645\u0648\u062b\u0648\u0642 \u0648\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a<br \/>\n        \u0627\u0644\u0645\u062a\u0631\u0627\u0643\u0645 \u0627\u0644\u0646\u0627\u062a\u062c \u0644\u0645 \u064a\u0639\u0648\u062f\u0627 \u0643\u0645\u0627 \u0641\u064a \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0623\u0635\u0644\u064a. \u0627\u0644\u0648\u0642\u0627\u064a\u0629 \u0647\u064a \u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u062d\u0627\u0644\u0629 \u0627\u0644\u0647\u064a\u062f\u0631<br \/>\n        \u0648\u0645\u0644\u0627\u0621\u0645\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0644\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u062e\u062a\u0627\u0631 \u0643\u0644\u0645\u0627 \u062a\u063a\u064a\u0631\u062a \u0634\u0628\u0643\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0623\u0648 \u0645\u062c\u0645\u0648\u0639\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646\u0629<br \/>\n        \u0627\u0644\u0645\u0648\u062b\u0648\u0642\u0629.\n      <\/p>\n<\/aside>\n<p>\n      \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0634\u0631\u062d \u0645\u0641\u0635\u0644 \u0644\u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0641\u064a \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0641\u0644\u064a \u0639\u0644\u0649 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u0644\u0629 \u0628\u0646\u0627\u0628\u0636\u060c \u0631\u0627\u062c\u0639<br \/>\n      <a href=\"https:\/\/zobai.com\/ar\/blog\/back-pressure-spring-loaded-safety-valve\/\">Back Pressure in Spring-Loaded Safety Valves guide<\/a>.<br \/>\n      This article keeps the point at architecture level: <strong>a shared discharge system can couple devices that otherwise<br \/>\n      appear separate.<\/strong>\n    <\/p>\n<p>\n      Two PSV bodies can be duplicated while the inlet nozzle, selector, manifold or discharge header remains shared. A dual<br \/>\n      arrangement therefore should not be described as fully independent until the actual shared flow path has been identified.\n    <\/p>\n<figure class=\"wp-block-image size-full zobai-figure\" data-image-slot=\"IMG-03\"><img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03.webp\" alt=\"Two PSVs sharing an inlet manifold and common discharge header, highlighting shared hydraulic dependencies.\" title=\"Single PSV vs Dual PSV: When Redundancy Changes the Relief Design - IMG-03\" width=\"1200\" height=\"900\" class=\"wp-image-56943\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/single-vs-dual-psv-img-03-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Two PSVs sharing an inlet manifold and common discharge header, highlighting shared hydraulic dependencies.<\/figcaption><\/figure>\n<\/section>\n<section aria-labelledby=\"decide-before-rfq\">\n<h2 id=\"decide-before-rfq\">How to Decide Between Single and Dual PSV Before the RFQ<\/h2>\n<p>\n      Start from the protection requirement, not from the number of valves you want to purchase.\n    <\/p>\n<p class=\"translation-block\">\u064a\u0638\u0644 <strong>\u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0630\u064a \u064a\u0633\u062a\u062e\u062f\u0645 \u0635\u0645\u0627\u0645 PSV \u0648\u0627\u062d\u062f\u064b\u0627 \u062e\u064a\u0627\u0631\u064b\u0627 \u0642\u0627\u0628\u0644\u064b\u0627 \u0644\u0644\u0646\u0638\u0631<\/strong>\u0639\u0646\u062f\u0645\u0627 \u064a\u0643\u0648\u0646 \u062c\u0647\u0627\u0632 \u0648\u0627\u062d\u062f \u0645\u0633\u062a\u0648\u0641\u064d \u0644\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627 \u0642\u0627\u062f\u0631\u064b\u0627 \u0639\u0644\u0649 \u0623\u062f\u0627\u0621 \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629\u060c<br>\n\u0648\u0644\u0627 \u062a\u062a\u0637\u0644\u0628 \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0645\u0633\u0627\u0631\u064b\u0627 \u0628\u062f\u064a\u0644\u064b\u0627 \u0641\u0639\u0627\u0644\u064b\u0627 \u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637\u060c<br>\n\u0648\u064a\u0643\u0648\u0646 \u062a\u0631\u062a\u064a\u0628 \u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u062f\u062e\u0648\u0644 \u0648\u0627\u0644\u062e\u0631\u0648\u062c \u0627\u0644\u0645\u0631\u0643\u0651\u0628 \u0645\u0642\u0628\u0648\u0644\u064b\u0627.<\/p>\n<p class=\"translation-block\">\u064a\u0635\u0628\u062d <strong>\u062a\u0631\u062a\u064a\u0628 \u0635\u0645\u0627\u0645 PSV \u0639\u0627\u0645\u0644 \u0648\u0622\u062e\u0631 \u0627\u062d\u062a\u064a\u0627\u0637\u064a \u062e\u064a\u0627\u0631\u064b\u0627 \u064a\u0633\u062a\u062d\u0642 \u0627\u0644\u062f\u0631\u0627\u0633\u0629<\/strong>\u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0647\u0646\u0627\u0643 \u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u0645\u0633\u0627\u0631 \u0628\u062f\u064a\u0644 \u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637<br>\n\u0623\u062b\u0646\u0627\u0621 \u0639\u062f\u0645 \u062a\u0648\u0641\u0631 \u0623\u062d\u062f \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646 \u0628\u0633\u0628\u0628 \u0627\u0644\u0641\u062d\u0635 \u0623\u0648 \u0627\u0644\u0635\u064a\u0627\u0646\u0629.<\/p>\n<p class=\"translation-block\">\u064a\u0635\u0628\u062d <strong>\u062a\u0631\u062a\u064a\u0628 \u064a\u0636\u0645 \u0639\u062f\u0629 \u0635\u0645\u0627\u0645\u0627\u062a PSV \u0639\u0627\u0645\u0644\u0629 \u062e\u064a\u0627\u0631\u064b\u0627 \u064a\u0633\u062a\u062d\u0642 \u0627\u0644\u062f\u0631\u0627\u0633\u0629<\/strong>\u0639\u0646\u062f\u0645\u0627 \u062a\u064f\u062d\u062a\u0633\u0628 \u0639\u0645\u062f\u064b\u0627 \u0642\u062f\u0631\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0644\u0623\u0643\u062b\u0631 \u0645\u0646 \u062c\u0647\u0627\u0632 \u0648\u0627\u062d\u062f \u0636\u0645\u0646 \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637\u060c<br>\n\u0623\u0648 \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0647\u0630\u0647 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u062c\u0632\u0621\u064b\u0627 \u0645\u0646 \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0629 \u0645\u0639\u062a\u0645\u062f\u0629 \u0644\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0632\u064a\u0627\u062f\u0629 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646 \u0637\u0631\u064a\u0642 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0639\u0644\u0649 \u0645\u0631\u0627\u062d\u0644.<\/p>\n<div class=\"zobai-table-wrap\" role=\"region\" aria-label=\"Single versus dual PSV architecture decision matrix\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Design need<\/th>\n<th scope=\"col\">Architecture to evaluate<\/th>\n<th scope=\"col\">Main engineering question<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>One device can provide the assigned protection function<\/td>\n<td>Single PSV<\/td>\n<td>Can one qualified device and its installed piping satisfy the complete design basis?<\/td>\n<\/tr>\n<tr>\n<td>Protection must remain available while one device is maintained<\/td>\n<td>\u062a\u0634\u063a\u064a\u0644\/\u0627\u062d\u062a\u064a\u0627\u0637<\/td>\n<td>Does changeover preserve an acceptable active relief path in every required state?<\/td>\n<\/tr>\n<tr>\n<td>More than one device contributes required relieving capacity<\/td>\n<td>Multiple active PSVs<\/td>\n<td>How is capacity credited and what multiple-device pressure basis applies?<\/td>\n<\/tr>\n<tr>\n<td>Staged relieving behavior is intentional<\/td>\n<td>Staged multiple devices<\/td>\n<td>What is the required sequence and capacity contribution of each device?<\/td>\n<\/tr>\n<tr>\n<td>Devices share inlet or outlet infrastructure<\/td>\n<td>Any applicable architecture<\/td>\n<td>Are the shared hydraulics acceptable for the credible operating and relieving states?<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>\n      <strong>Protection basis.<\/strong> Define the protected equipment or system, governing relief scenario or scenarios,<br \/>\n      required relieving capacity, relieving fluid and relevant relieving conditions, plus the applicable construction code<br \/>\n      and project specification.\n    <\/p>\n<p>\n      <strong>Purpose of the second PSV.<\/strong> State whether the second device is intended for standby availability,<br \/>\n      capacity contribution, staged relief or another explicitly defined protection requirement. Do not leave this as simply<br \/>\n      \u201cquantity: 2.\u201d\n    <\/p>\n<p>\n      <strong>\u0623\u0633\u0627\u0633 \u0627\u0644\u0636\u063a\u0637.<\/strong> Define the project basis for set pressure, any intended multiple-device relationship,<br \/>\n      and the equipment pressure limit against which protection is being checked. For detailed definitions of set pressure,<br \/>\n      overpressure, accumulation and blowdown, use the<br \/>\n      <a href=\"https:\/\/zobai.com\/ar\/blog\/safety-valve-set-pressure-overpressure-blowdown\/\">Safety Valve Set Pressure, Overpressure and Blowdown Guide<\/a>.\n    <\/p>\n<p>\n      <strong>Inlet arrangement.<\/strong> Define whether the valves use dedicated or common inlets, the nozzle\/manifold<br \/>\n      arrangement, credible flow paths and the installation pressure-loss basis.\n    <\/p>\n<p>\n      <strong>Discharge arrangement.<\/strong> Define atmospheric versus closed discharge, common-header involvement,<br \/>\n      expected back-pressure basis and which devices can credibly relieve together.\n    <\/p>\n<p>\n      <strong>Maintenance and isolation.<\/strong> Clarify whether one PSV needs to be removed while the equipment remains<br \/>\n      operating, whether a selector\/changeover arrangement is intended, how the active relief path is identified and<br \/>\n      maintained, and which inspection\/repair documentation is required by the project or jurisdiction.\n    <\/p>\n<p>\n      <strong>Materials and seat performance.<\/strong> State the process fluid, temperature, contaminants and corrosion<br \/>\n      concerns that can affect wetted trim, seat\/seal materials and any pilot or auxiliary components where applicable.<br \/>\n      If the project has a seat-tightness acceptance requirement, specify the test\/documentation basis separately from<br \/>\n      capacity certification; seat tightness and relieving capacity answer different questions.\n    <\/p>\n<p>\n      <strong>Supplier evidence.<\/strong> For the proposed device and arrangement, ask the supplier to confirm the evidence<br \/>\n      required by the project. Depending on the project, that may include the selected configuration, documented or certified<br \/>\n      capacity basis, pressure and temperature limits, material suitability, back-pressure suitability, connection arrangement,<br \/>\n      seat-tightness requirement and applicable documentation.\n    <\/p>\n<p>\n      These requirements do not prove that any particular ZOBAI model or certification is already suitable. Product capability<br \/>\n      must still be confirmed against the actual project.\n    <\/p>\n<p>\n      <strong>Choose the architecture only after you know what the second PSV is meant to accomplish, what protection remains<br \/>\n      when one device is unavailable, and which inlet or outlet components the devices still share.<\/strong>\n    <\/p>\n<div class=\"zobai-cta\">\n<p><strong>Have the relief basis but not the final PSV arrangement?<\/strong><\/p>\n<p>\n        Send the protected equipment, relief scenario, required capacity, set-pressure basis, inlet\/outlet arrangement<br \/>\n        and maintenance requirement for an engineering selection review.\n      <\/p>\n<p><a href=\"https:\/\/zobai.com\/ar\/ask-an-engineer\/\">\u0627\u0633\u0623\u0644 \u0645\u0647\u0646\u062f\u0633 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646<\/a><\/p>\n<\/p><\/div>\n<\/section>\n<section aria-labelledby=\"single-dual-psv-faq\">\n<h2 id=\"single-dual-psv-faq\">Frequently Asked Questions About Single vs Dual PSV Design<\/h2>\n<h3>Is a dual PSV arrangement always redundant?<\/h3>\n<p>\n      No. Two installed PSVs may be duty\/standby devices, two active devices sharing required capacity, or part of a staged<br \/>\n      relief strategy. Call the arrangement redundant only after defining which protection function must remain with one<br \/>\n      device unavailable and confirming that the remaining capacity and flow path still satisfy the applicable design basis.\n    <\/p>\n<h3>Can two PSVs simply split the required relieving capacity 50\/50?<\/h3>\n<p>\n      Do not use 50\/50 as a default rule. Start with the governing required relieving capacity, then determine how much<br \/>\n      certified or documented capacity each device is intended to contribute under the applicable construction code and<br \/>\n      project basis. An equal split may be a project outcome, but it is not a substitute for the sizing and selection review.\n    <\/p>\n<h3>Can one PSV be isolated for maintenance while the process remains online?<\/h3>\n<p>\n      Only when the approved duty\/standby or changeover arrangement preserves the required active relief path and the current<br \/>\n      construction code, project specification, owner procedure and jurisdiction allow that operating state. The selector,<br \/>\n      inlet path, pressure loss and discharge path still have to be included in the installation review.\n    <\/p>\n<h3>Do both PSVs need the same set pressure?<\/h3>\n<p>\n      Not as a universal rule. Multiple-device systems can have different permitted pressure-setting relationships depending<br \/>\n      on the governing construction code and design basis. The safe approach is to verify the exact applicable rule rather<br \/>\n      than copy a generic percentage from another project or article.\n    <\/p>\n<h3>Does a common discharge header change the dual-PSV design?<\/h3>\n<p>\n      It can. A common header creates a shared downstream pressure environment, so the credible combination of relieving<br \/>\n      devices and the resulting back pressure have to be reviewed. A later change to the header or to the simultaneous relief<br \/>\n      cases can require the valve suitability and downstream calculation to be checked again.\n    <\/p>\n<h3>What should be included in an RFQ for a single or dual PSV arrangement?<\/h3>\n<p>\n      Provide the protected equipment, governing relief scenario, required relieving capacity, relieving fluid and conditions,<br \/>\n      set-pressure basis, purpose of the second PSV, inlet\/manifold arrangement, discharge destination and back-pressure basis,<br \/>\n      maintenance\/changeover requirement, applicable code\/project specification, and the capacity, material, seat-tightness and<br \/>\n      documentation evidence the supplier is expected to confirm.\n    <\/p>\n<\/section>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>\u0642\u0627\u0631\u0646 \u0628\u064a\u0646 \u062a\u0631\u062a\u064a\u0628\u0627\u062a PSV \u0627\u0644\u0645\u0641\u0631\u062f\u0629 \u0648\u0627\u0644\u0645\u0632\u062f\u0648\u062c\u0629 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u062a\u0643\u0631\u0627\u0631\u060c \u0648\u062a\u0642\u0627\u0633\u0645 \u0627\u0644\u0633\u0639\u0629\u060c \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629 \u0627\u0644\u0627\u062d\u062a\u064a\u0627\u0637\u064a\u0629\u060c \u0648\u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0634\u062a\u0631\u0643\u0629\u2014\u0648\u0627\u0643\u062a\u0634\u0641 \u0645\u0627 \u064a\u062c\u0628 \u062a\u062d\u062f\u064a\u062f\u0647 \u0642\u0628\u0644 \u0637\u0644\u0628 \u0639\u0631\u0636 \u0627\u0644\u0633\u0639\u0631.<\/p>","protected":false},"author":2,"featured_media":56941,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[],"class_list":["post-56930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-valve-types-selection"],"_links":{"self":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/comments?post=56930"}],"version-history":[{"count":0,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56930\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media\/56941"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media?parent=56930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/categories?post=56930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/tags?post=56930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}