{"id":56804,"date":"2026-09-11T08:27:23","date_gmt":"2026-09-11T08:27:23","guid":{"rendered":"https:\/\/zobai.com\/?p=56804"},"modified":"2026-10-27T04:22:03","modified_gmt":"2026-10-27T04:22:03","slug":"safety-valve-inlet-pressure-loss-why-3-rules-are-not-universal","status":"publish","type":"post","link":"https:\/\/zobai.com\/ar\/blog\/safety-valve-inlet-pressure-loss-why-3-rules-are-not-universal\/","title":{"rendered":"\u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0645\u062f\u062e\u0644 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646: \u0644\u0645\u0627\u0630\u0627 \u0644\u0627 \u062a\u064f\u0639\u062f \u0642\u0648\u0627\u0639\u062f 3% \u0642\u0627\u0639\u062f\u0629 \u0639\u0627\u0645\u0629"},"content":{"rendered":"<style> .zobai-article { max-width: 100%; overflow-wrap: break-word; } .zobai-article .zobai-table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.5rem 0; } .zobai-article .zobai-table-scroll table { width: 100%; min-width: 640px; border-collapse: collapse; } .zobai-article .zobai-table-scroll th, .zobai-article .zobai-table-scroll td { padding: 0.75rem; vertical-align: top; text-align: left; } .zobai-article .zobai-engineering-cta { margin-top: 2rem; padding: 1.25rem; border: 1px solid currentColor; border-radius: 8px; } .zobai-article .zobai-engineering-cta p:last-child { margin-bottom: 0; } @media (max-width: 767px) { .zobai-article .zobai-table-scroll { margin: 1.25rem 0; } .zobai-article .zobai-table-scroll th, .zobai-article .zobai-table-scroll td { padding: 0.65rem; } } <\/style>\n<article class=\"zobai-article\">\n<p>A <strong>\u0641\u0642\u062f\u0627\u0646 \u0636\u063a\u0637 \u0627\u0644\u0645\u062f\u062e\u0644 3%<\/strong> \u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0647\u0630\u0627 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0639\u0644\u0649 \u0646\u0637\u0627\u0642 \u0648\u0627\u0633\u0639 \u0639\u0646\u062f \u0645\u0631\u0627\u062c\u0639\u0629 \u062a\u0631\u0643\u064a\u0628\u0627\u062a \u0635\u0645\u0627\u0645\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637\u060c \u0644\u0643\u0646\u0647 \u0644\u064a\u0633 \u0642\u0627\u0639\u062f\u0629 \u0642\u0628\u0648\u0644\/\u0631\u0641\u0636 \u0634\u0627\u0645\u0644\u0629 \u0644\u0643\u0644 \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0623\u0648 \u0643\u0644 \u0645\u0639\u064a\u0627\u0631 \u0623\u0648 \u0643\u0644 \u062e\u062f\u0645\u0629.<\/p>\n<p>\u0628\u0645\u0648\u062c\u0628 API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a\u060c \u062a\u064f\u0639\u062f \u0642\u064a\u0645\u0629 3% \u0627\u0644\u0645\u0623\u0644\u0648\u0641\u0629 \u0645\u0639\u064a\u0627\u0631 \u0641\u0631\u0632 \u0645\u0647\u0645 \u0644\u0641\u0642\u062f\u0627\u0646 \u0636\u063a\u0637 \u0627\u0644\u0645\u062f\u062e\u0644 \u063a\u064a\u0631 \u0627\u0644\u0642\u0627\u0628\u0644 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f. \u0648\u062a\u0634\u064a\u0631 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0631\u0633\u0645\u064a\u0629 \u0627\u0644\u0635\u0627\u062f\u0631\u0629 \u0639\u0646 API \u0625\u0644\u0649 \u0623\u0646 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a\u060c \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0633\u0627\u0628\u0639\u060c \u0647\u0648 \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0645\u0646\u0634\u0648\u0631 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629\u060c \u0648\u062a\u0630\u0643\u0631 \u0623\u0646\u0647 \u0642\u062f\u0651\u0645 <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/important-standards-announcements\/520part-ii\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u062a\u062d\u0644\u064a\u0644 \u0647\u0646\u062f\u0633\u064a<\/a> \u0644\u0645\u0633\u0627\u0631 \u062a\u0642\u064a\u064a\u0645 \u062a\u0631\u0643\u064a\u0628\u0627\u062a \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637.<\/p>\n<p>\u0647\u0630\u0627 \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u064a\u063a\u064a\u0651\u0631 \u0637\u0631\u064a\u0642\u0629 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0631\u0642\u0645. \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0644\u0644\u0645\u0647\u0646\u062f\u0633 \u0623\u0646 \u064a\u0628\u062f\u0623 \u0628\u0633\u0624\u0627\u0644: \u201c\u0647\u0644 \u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u0636\u063a\u0637 \u0623\u0642\u0644 \u0645\u0646 3%\u061f\u201d \u0628\u0644 \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0627\u0644\u0623\u0641\u0636\u0644 \u0647\u0648: \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645\u060c \u0648\u062a\u0623\u0643\u064a\u062f \u0646\u0648\u0639 \u0627\u0644\u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0630\u064a \u064a\u062a\u0645 \u062d\u0633\u0627\u0628\u0647\u060c \u0648\u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u0627\u0633\u062a\u0634\u0639\u0627\u0631\u060c \u062b\u0645 \u062a\u062d\u062f\u064a\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0645\u0623\u0644\u0648\u0641 \u0647\u0648 \u0641\u0639\u0644\u0627\u064b \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0641\u0631\u0632 \u0627\u0644\u0645\u0646\u0637\u0628\u0642\u0629.<\/p>\n<p>\u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0627\u0644\u0623\u0642\u0644 \u0645\u0646 3% \u0644\u0627 \u062a\u0636\u0645\u0646 \u0628\u062d\u062f \u0630\u0627\u062a\u0647\u0627 \u0633\u0644\u0648\u0643\u064b\u0627 \u0645\u0633\u062a\u0642\u0631\u064b\u0627 \u0644\u0644\u0635\u0645\u0627\u0645. \u0648\u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0627\u0644\u0623\u0639\u0644\u0649 \u0645\u0646 3% \u0644\u0627 \u062a\u062b\u0628\u062a \u0628\u062d\u062f \u0630\u0627\u062a\u0647\u0627 \u0623\u0646 \u0643\u0644 \u062a\u0631\u0643\u064a\u0628 \u064a\u062c\u0628 \u0631\u0641\u0636\u0647. \u0627\u0644\u0645\u0647\u0645 \u0647\u0648 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0627\u0644\u0643\u0627\u0645\u0646 \u0648\u0631\u0627\u0621 \u0627\u0644\u0631\u0642\u0645.<\/p>\n<section aria-labelledby=\"meaning-of-3-percent\">\n<h2 id=\"meaning-of-3-percent\">\u0645\u0627 \u064a\u0639\u0646\u064a\u0647 \u0645\u0639\u064a\u0627\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0645\u062f\u062e\u0644 3% \u2014 \u0648\u0645\u0627 \u0644\u0627 \u064a\u062b\u0628\u062a\u0647<\/h2>\n<p>\u0628\u0645\u0648\u062c\u0628 API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a\u060c \u064a\u062a\u0639\u0644\u0642 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0645\u0623\u0644\u0648\u0641 <strong>\u0628\u0625\u062c\u0645\u0627\u0644\u064a \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u063a\u064a\u0631 \u0627\u0644\u0642\u0627\u0628\u0644 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f \u0628\u064a\u0646 \u0627\u0644\u0645\u0639\u062f\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637\u060c \u0645\u0646\u0633\u0648\u0628\u064b\u0627 \u0625\u0644\u0649 \u0636\u063a\u0637 \u0636\u0628\u0637 \u0627\u0644\u0635\u0645\u0627\u0645<\/strong>.<\/p>\n<p>\u0627\u0644\u0643\u0644\u0645\u0629 <em>\u063a\u064a\u0631 \u0642\u0627\u0628\u0644 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f<\/em> \u0623\u0645\u0631 \u0645\u0647\u0645. \u0641\u0641\u0642\u062f\u0627\u0646 \u0636\u063a\u0637 \u0627\u0644\u0645\u062f\u062e\u0644 \u0644\u064a\u0633 \u0645\u062c\u0631\u062f \u0643\u0644 \u0641\u0631\u0642 \u0636\u063a\u0637 \u0642\u062f \u064a\u0648\u062c\u062f \u0628\u064a\u0646 \u0627\u0644\u0645\u0639\u062f\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0627\u0644\u0635\u0645\u0627\u0645. \u0641\u0627\u0644\u0627\u062d\u062a\u0643\u0627\u0643 \u0648\u0627\u0644\u0627\u0636\u0637\u0631\u0627\u0628 \u0648\u0627\u0644\u062a\u062c\u0647\u064a\u0632\u0627\u062a \u0648\u0627\u0644\u0642\u064a\u0648\u062f \u0648\u0645\u0642\u0627\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0623\u062e\u0631\u0649 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0628\u062f\u062f \u0627\u0644\u0636\u063a\u0637 \u0623\u062b\u0646\u0627\u0621 \u062a\u062d\u0631\u0643 \u0627\u0644\u0645\u0627\u0626\u0639 \u0646\u062d\u0648 \u0627\u0644\u0635\u0645\u0627\u0645. \u0623\u0645\u0627 \u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u0627\u0631\u062a\u0641\u0627\u0639 \u0648\u0627\u0644\u0633\u0631\u0639\u0629 \u0627\u0644\u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f \u0641\u064a\u062c\u0628 \u0645\u0639\u0627\u0644\u062c\u062a\u0647\u0627 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u0629 \u0627\u0644\u0645\u0646\u0637\u0628\u0642\u0629 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u062a\u062c\u0645\u064a\u0639\u0647\u0627 \u0639\u0634\u0648\u0627\u0626\u064a\u064b\u0627 \u0641\u064a \u201c\u0627\u0646\u062e\u0641\u0627\u0636 \u0636\u063a\u0637 3%\u201d.\u201d<\/p>\n<p>\u064a\u062c\u0628 \u0623\u064a\u0636\u064b\u0627 \u062a\u062d\u062f\u064a\u062f \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u062f\u0641\u0642. \u0633\u0639\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u0642\u062f\u0631\u0629 \u0647\u064a \u0623\u0633\u0627\u0633 \u062a\u0635\u0645\u064a\u0645 \u0634\u0627\u0626\u0639 \u0648\u0641\u0642 \u0645\u0645\u0627\u0631\u0633\u0627\u062a API\u060c \u0644\u0643\u0646 \u0644\u064a\u0633 \u0635\u062d\u064a\u062d\u064b\u0627 \u0643\u062a\u0627\u0628\u0629 \u0623\u0646 \u0643\u0644 \u062d\u0633\u0627\u0628 \u0644\u0641\u0642\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0641\u064a \u0643\u0644 \u062a\u0643\u0648\u064a\u0646 \u0645\u0633\u0645\u0648\u062d \u0628\u0647 \u064a\u062c\u0628 \u0623\u0646 \u064a\u0633\u062a\u062e\u062f\u0645 \u062f\u0627\u0626\u0645\u064b\u0627 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0642\u062f\u0631. \u0628\u0639\u0636 \u0633\u0644\u0648\u0643\u064a\u0627\u062a \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u0645\u0633\u0627\u0631\u0627\u062a \u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u063a\u064a\u0651\u0631 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0637\u0628\u0642.<\/p>\n<p>\u0644\u0647\u0630\u0627 \u0627\u0644\u0633\u0628\u0628\u060c \u0641\u0625\u0646 \u0639\u0628\u0627\u0631\u0629 \u0645\u062c\u0631\u062f\u0629 \u0645\u062b\u0644 \u201c\u0641\u0642\u062f \u0627\u0644\u0645\u062f\u062e\u0644 = 2.7%\u201d \u062a\u0643\u0648\u0646 \u063a\u064a\u0631 \u0645\u0643\u062a\u0645\u0644\u0629 \u0645\u0627 \u0644\u0645 \u064a\u0643\u0646 \u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0633\u0627\u0628 \u0645\u0639\u0631\u0648\u0641\u064b\u0627.<\/p>\n<div class=\"zobai-table-scroll\" role=\"region\" aria-label=\"Meaning of inlet pressure loss calculation results\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">\u0646\u062a\u064a\u062c\u0629 \u0627\u0644\u062d\u0633\u0627\u0628<\/th>\n<th scope=\"col\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062b\u0628\u062a\u0647<\/th>\n<th scope=\"col\">\u0645\u0627 \u0627\u0644\u0630\u064a \u0644\u0627 \u064a\u062b\u0628\u062a\u0647<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u064a\u062d\u0642\u0642 \u0645\u0639\u064a\u0627\u0631 \u0641\u062d\u0635 \u0641\u0642\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0645\u0637\u0628\u0642<\/td>\n<td>\u062a\u0645 \u0627\u0633\u062a\u064a\u0641\u0627\u0621 \u0647\u0630\u0627 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a \u0627\u0644\u0645\u062d\u062f\u062f<\/td>\n<td>\u062a\u0634\u063a\u064a\u0644 \u0645\u0633\u062a\u0642\u0631 \u0645\u0636\u0645\u0648\u0646 \u062a\u062d\u062a \u0643\u0644 \u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u064a\u062a\u062c\u0627\u0648\u0632 \u0642\u064a\u0645\u0629 \u0627\u0644\u0641\u062d\u0635 \u0627\u0644\u0645\u0623\u0644\u0648\u0641\u0629<\/td>\n<td>\u0645\u0637\u0644\u0648\u0628 \u0645\u0631\u0627\u062c\u0639\u0629 \u0641\u0646\u064a\u0629 \u0625\u0636\u0627\u0641\u064a\u0629<\/td>\n<td>\u062d\u062f\u0648\u062b \u0627\u0647\u062a\u0632\u0627\u0632 \u0645\u0639\u064a\u0646 \u0623\u0648 \u0641\u0634\u0644 \u062a\u0644\u0642\u0627\u0626\u064a \u0623\u0648 \u0631\u0641\u0636 \u0639\u0627\u0644\u0645\u064a \u0645\u0646 \u0627\u0644\u0643\u0648\u062f<\/td>\n<\/tr>\n<tr>\n<td>\u062a\u062d\u0644\u064a\u0644 \u0647\u0646\u062f\u0633\u064a \u0645\u0633\u0645\u0648\u062d \u0628\u0647 \u064a\u062f\u0639\u0645 \u0627\u0644\u062a\u0631\u0643\u064a\u0628<\/td>\n<td>\u0642\u062f \u064a\u0643\u0648\u0646 \u0647\u0646\u0627\u0643 \u0623\u0633\u0627\u0633 \u0641\u0646\u064a \u0645\u0648\u062b\u0642 \u0644\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u062d\u062f\u062f<\/td>\n<td>\u0623\u0646 \u0627\u0644\u0633\u0639\u0629 \u0623\u0648 \u0627\u0644\u062d\u062f\u0648\u062f \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0627\u0644\u0635\u0645\u0627\u0645 \u0623\u0648 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u064a\u0645\u0643\u0646 \u062a\u062c\u0627\u0647\u0644\u0647\u0627<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u0647\u0630\u0627 \u0647\u0648 \u0627\u0644\u062a\u0635\u062d\u064a\u062d \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0627\u0644\u0623\u0648\u0644 \u0644\u0642\u0627\u0639\u062f\u0629 \u201c3%\u201d \u0627\u0644\u0634\u0627\u0626\u0639\u0629: <strong>\u0627\u0644\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0626\u0648\u064a\u0629 \u0647\u064a \u0645\u0639\u064a\u0627\u0631 \u0641\u0631\u0632 \u0623\u0648\u0644\u064a\u060c \u0648\u0644\u064a\u0633\u062a \u062d\u062f\u064b\u0627 \u0641\u064a\u0632\u064a\u0627\u0626\u064a\u064b\u0627 \u0644\u0644\u0627\u0633\u062a\u0642\u0631\u0627\u0631<\/strong>.<\/p>\n<p>\u062a\u062d\u062a\u0648\u064a \u0635\u0645\u0627\u0645\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0639\u0644\u0649 \u062f\u064a\u0646\u0627\u0645\u064a\u0643\u064a\u0627\u062a \u0646\u0638\u0627\u0645 \u0644\u0627 \u064a\u0645\u0643\u0646 \u0644\u0646\u0633\u0628\u0629 \u0645\u0626\u0648\u064a\u0629 \u0648\u0627\u062d\u062f\u0629 \u0648\u0635\u0641\u0647\u0627 \u0628\u0627\u0644\u0643\u0627\u0645\u0644. \u0644\u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u0627\u0633\u062a\u064a\u0641\u0627\u0621 \u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0641\u0631\u0632 \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0623\u0646 \u064a\u064f\u062a\u0631\u062c\u0645 \u0625\u0644\u0649 \u201c\u0627\u0644\u0635\u0645\u0627\u0645 \u0644\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0647\u062a\u0632\u201d\u060c \u062a\u0645\u0627\u0645\u064b\u0627 \u0643\u0645\u0627 \u0623\u0646 \u062a\u062c\u0627\u0648\u0632\u0647 \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0623\u0646 \u064a\u064f\u062a\u0631\u062c\u0645 \u0625\u0644\u0649 \u201c\u0627\u0644\u0635\u0645\u0627\u0645 \u0633\u0648\u0641 \u064a\u0647\u062a\u0632\u201d.\u201d<\/p>\n<\/section>\n<section aria-labelledby=\"what-controls-applicability\">\n<h2 id=\"what-controls-applicability\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062d\u062f\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0645\u0639\u064a\u0627\u0631 3% \u064a\u0646\u0637\u0628\u0642\u061f<\/h2>\n<p>\u0642\u0628\u0644 \u062a\u0637\u0628\u064a\u0642 \u0623\u064a \u0645\u0639\u064a\u0627\u0631 \u0646\u0633\u0628\u0629 \u0645\u0626\u0648\u064a\u0629\u060c \u062d\u062f\u062f \u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u062a\u064a \u062a\u062d\u0643\u0645 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0641\u0639\u0644\u064a\u064b\u0627.<\/p>\n<p>\u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062b\u0631 API \u0648ASME \u0648ISO \u0648\u0627\u0644\u0644\u0648\u0627\u0626\u062d \u0627\u0644\u0648\u0637\u0646\u064a\u0629 \u0648\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0645\u0627\u0644\u0643 \u0648\u062a\u0639\u0644\u064a\u0645\u0627\u062a \u0627\u0644\u0645\u0635\u0646\u0639 \u062c\u0645\u064a\u0639\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u0645\u0634\u0631\u0648\u0639\u060c \u0644\u0643\u0646 \u0644\u064a\u0633 \u0644\u0647\u0627 \u0646\u0641\u0633 \u0627\u0644\u0646\u0637\u0627\u0642 \u0623\u0648 \u0627\u0644\u0645\u0643\u0627\u0646\u0629.<\/p>\n<p>\u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062e\u0631\u064a\u0637\u0629 \u0623\u0648\u0633\u0639 \u0644\u0647\u0630\u0647 \u0627\u0644\u0623\u062f\u0648\u0627\u0631\u060c \u0631\u0627\u062c\u0639 <a href=\"https:\/\/zobai.com\/ar\/blog\/safety-valve-standards-guide\/\">\u062f\u0644\u064a\u0644 \u0645\u0639\u0627\u064a\u064a\u0631 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646<\/a>. \u0645\u0646 ZOBAI. \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0645\u0634\u0627\u0631\u064a\u0639 \u0627\u0644\u062a\u064a \u062a\u0633\u062a\u062e\u062f\u0645 \u0645\u0646\u0647\u062c\u064a\u0629 API \u062a\u062d\u062f\u064a\u062f\u064b\u0627\u060c \u0641\u0625\u0646 <a href=\"https:\/\/zobai.com\/ar\/standards\/api-520-safety-valve-sizing\/\">\u062f\u0644\u064a\u0644 \u0647\u0646\u062f\u0633\u0629 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 API 520<\/a> \u064a\u0648\u0641\u0631 \u0633\u064a\u0627\u0642\u064b\u0627 \u0623\u0648\u0633\u0639 \u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0648\u0627\u0644\u062a\u0631\u0643\u064a\u0628.<\/p>\n<h3>\u0627\u0628\u062f\u0623 \u0628\u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645\u060c \u0648\u0644\u064a\u0633 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0626\u0648\u064a\u0629<\/h3>\n<p><a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/bpvc-section-viii-rules-for-construction-of-pressure-vessels-division-1\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">\u064a\u062d\u062f\u062f ASME \u0627\u0644\u0642\u0633\u0645 VIII \u0627\u0644\u0641\u0631\u0639 1 \u0645\u0646 BPVC\u060c \u0625\u0635\u062f\u0627\u0631 2025<\/a> \u0643\u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u062d\u0627\u0644\u064a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629.<\/p>\n<p>\u0636\u0645\u0646 \u0647\u064a\u0643\u0644 BPVC 2025 \u0627\u0644\u0642\u0633\u0645 VIII \u0627\u0644\u0641\u0631\u0639 1\u060c \u062a\u0638\u0647\u0631 \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0648\u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629 \u0628\u0647\u0630\u0627 \u0627\u0644\u0645\u0648\u0636\u0648\u0639 \u0641\u064a <strong>\u0627\u0644\u0645\u0644\u062d\u0642 M \u063a\u064a\u0631 \u0627\u0644\u0625\u0644\u0632\u0627\u0645\u064a<\/strong>, \u0636\u0645\u0646 \u0625\u0631\u0634\u0627\u062f\u0627\u062a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0648\u0627\u0644\u062a\u0634\u063a\u064a\u0644\u060c \u0645\u0639 \u0646\u0637\u0627\u0642 \u0635\u0631\u064a\u062d \u0644\u0644\u062c\u0647\u0627\u0632 \u0648\u062e\u062f\u0645\u0629 \u0627\u0644\u0645\u0648\u0627\u0626\u0639 \u0627\u0644\u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u0627\u0646\u0636\u063a\u0627\u0637. \u064a\u0646\u0628\u063a\u064a \u0627\u0644\u062d\u0641\u0627\u0638 \u0639\u0644\u0649 \u0647\u0630\u0647 \u0627\u0644\u0635\u0641\u0629 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u062e\u062a\u0635\u0627\u0631\u0647\u0627 \u0625\u0644\u0649 \u201cASME \u062a\u0634\u062a\u0631\u0637 \u0639\u0627\u0644\u0645\u064a\u064b\u0627 3%.\u201d<\/p>\n<p>\u062a\u0642\u062f\u0645 ISO \u062a\u0648\u0636\u064a\u062d\u064b\u0627 \u0645\u062e\u062a\u0644\u0641\u064b\u0627 \u0644\u0644\u0645\u0634\u0643\u0644\u0629 \u0646\u0641\u0633\u0647\u0627. <a href=\"https:\/\/www.iso.org\/standard\/35393.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">ISO 4126-9<\/a> \u064a\u062e\u062a\u0635 \u062a\u062d\u062f\u064a\u062f\u064b\u0627 \u0628\u062c\u0632\u0621 \u0627\u0644\u062a\u0637\u0628\u064a\u0642 \u0648\u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0645\u0646 \u0639\u0627\u0626\u0644\u0629 ISO 4126. \u0648\u064a\u0634\u0645\u0644 \u0646\u0637\u0627\u0642\u0647 \u0627\u0644\u0645\u0646\u0634\u0648\u0631 \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u062a\u064a \u062a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a\u060c \u0648\u064a\u0646\u0635 \u0639\u0644\u0649 \u0623\u0646 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u062a\u0641\u062a\u0631\u0636 <strong>\u062a\u062f\u0641\u0642 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631<\/strong>.<\/p>\n<p>\u0644\u0630\u0644\u0643 \u0641\u0625\u0646 \u0639\u0628\u0627\u0631\u0629 \u201c\u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u064a\u062a\u0628\u0639 ISO 4126\u201d \u0644\u0627 \u062a\u0632\u0627\u0644 \u063a\u064a\u0631 \u0643\u0627\u0641\u064a\u0629 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a. \u0641\u0645\u0627 \u064a\u0647\u0645 \u0647\u0648 \u0627\u0644\u062c\u0632\u0621 \u0630\u0648 \u0627\u0644\u0635\u0644\u0629 \u0648\u0646\u0637\u0627\u0642 \u0627\u0644\u062e\u062f\u0645\u0629.<\/p>\n<h3>\u062b\u0645 \u062d\u062f\u062f \u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u062c\u0647\u0627\u0632<\/h3>\n<p>\u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u062a\u0627\u0644\u064a \u0647\u0648 \u0646\u0648\u0639 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u0631\u0643\u0651\u0628.<\/p>\n<p>\u0644\u0627 \u064a\u062a\u0628\u0639 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0642\u0644\u064a\u062f\u064a \u0627\u0644\u0645\u062d\u0645\u0651\u0644 \u0628\u0646\u0627\u0628\u0636 \u0645\u0628\u0627\u0634\u0631\u060c \u0648\u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0645\u062a\u0648\u0627\u0632\u0646\u060c \u0648\u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u0630\u064a \u064a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a \u0628\u0627\u0644\u0636\u0631\u0648\u0631\u0629 \u0627\u0644\u0645\u0646\u0637\u0642 \u0646\u0641\u0633\u0647 \u0641\u064a \u0627\u0644\u0627\u0633\u062a\u0642\u0631\u0627\u0631 \u0623\u0648 \u0627\u0644\u0627\u0633\u062a\u0634\u0639\u0627\u0631. \u0648\u0641\u064a \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0630\u064a \u064a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a\u060c \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0645\u0648\u0642\u0639 \u0627\u0644\u0630\u064a \u064a\u0633\u062a\u0634\u0639\u0631 \u0645\u0646\u0647 \u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a \u0636\u063a\u0637 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a \u0630\u0627 \u0623\u0647\u0645\u064a\u0629 \u062e\u0627\u0635\u0629.<\/p>\n<p>\u0648\u0647\u0630\u0627 \u0644\u0627 \u064a\u0639\u0646\u064a \u0623\u0646 \u201c\u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a = \u0625\u0639\u0641\u0627\u0621 \u0645\u0646 \u0642\u0627\u0639\u062f\u0629 3%\u201d. \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u0627\u0644\u0635\u062d\u064a\u062d \u0623\u0636\u064a\u0642 \u0645\u0646 \u0630\u0644\u0643: <strong>\u0642\u062f \u064a\u063a\u064a\u0651\u0631 \u062a\u0631\u062a\u064a\u0628 \u0627\u0633\u062a\u0634\u0639\u0627\u0631 \u0645\u0639\u064a\u0651\u0646 \u0643\u064a\u0641\u064a\u0629 \u062a\u0623\u062b\u064a\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0641\u064a \u0627\u0644\u0645\u062f\u062e\u0644 \u0639\u0644\u0649 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u0635\u0645\u0627\u0645\u060c \u0628\u064a\u0646\u0645\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062b\u0631 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u0627 \u0641\u064a \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0639\u0644\u0649 \u0636\u063a\u0637 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062a\u0627\u062d \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641<\/strong>.<\/p>\n<p>\u064a\u0645\u0643\u0646 \u0644\u0644\u0642\u0631\u0627\u0621 \u0627\u0644\u0630\u064a\u0646 \u064a\u062d\u062a\u0627\u062c\u0648\u0646 \u0625\u0644\u0649 \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a \u0623\u0648\u0644\u064b\u0627 \u0627\u0644\u0631\u062c\u0648\u0639 \u0625\u0644\u0649 <a href=\"https:\/\/zobai.com\/ar\/blog\/how-does-a-pilot-operated-safety-valve-work\/\">\u062f\u0644\u064a\u0644 \u0645\u0628\u062f\u0623 \u0639\u0645\u0644 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u0630\u064a \u064a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a<\/a> \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u062a\u0648\u0633\u064a\u0639 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0644\u062a\u0635\u0628\u062d \u062f\u0644\u064a\u0644\u064b\u0627 \u0643\u0627\u0645\u0644\u064b\u0627 \u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a.<\/p>\n<h3>\u062a\u0623\u0643\u064a\u062f \u0627\u0644\u062e\u062f\u0645\u0629 \u0648\u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/h3>\n<p>\u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u062d\u0627\u0643\u0645 \u0623\u064a\u0636\u064b\u0627 \u0639\u0644\u0649 \u0645\u0627 \u064a\u062d\u0645\u064a \u0627\u0644\u062c\u0647\u0627\u0632 \u0645\u0646\u0647.<\/p>\n<p>\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u062a\u0639\u0645\u064a\u0645 \u0648\u0627\u062c\u0628 \u062a\u0645\u062f\u062f \u062d\u0631\u0627\u0631\u064a \u0633\u0627\u0626\u0644 \u0645\u062d\u062f\u062f \u0628\u0634\u0643\u0644 \u0636\u064a\u0642 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0639\u0644\u0649 \u062a\u0633\u062e\u064a\u0646 \u0627\u0644\u0639\u0645\u0644\u064a\u0629 \u0623\u0648 \u0627\u0644\u062a\u0628\u062e\u064a\u0631 \u0623\u0648 \u0627\u0644\u062a\u0639\u0631\u0636 \u0644\u0644\u062d\u0631\u064a\u0642 \u0623\u0648 \u0627\u0646\u0633\u062f\u0627\u062f \u0627\u0644\u0645\u062e\u0631\u062c \u0623\u0648 \u0623\u064a \u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0622\u062e\u0631 \u0645\u0639\u062a\u0628\u0631 \u0644\u0632\u064a\u0627\u062f\u0629 \u0627\u0644\u0636\u063a\u0637. \u0648\u0628\u0627\u0644\u0645\u062b\u0644\u060c \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0623\u0633\u0627\u0633 \u062a\u0631\u0643\u064a\u0628 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 \u064a\u063a\u0637\u064a \u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u062b\u0646\u0627\u0626\u064a\u0629 \u0627\u0644\u0637\u0648\u0631 \u062f\u0648\u0646 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0642\u064a\u0627\u0633\u064a \u0627\u0644\u0645\u0646\u0627\u0633\u0628.<\/p>\n<p>\u064a\u0648\u0636\u062d ISO \u0647\u0630\u0627 \u0627\u0644\u062d\u062f \u0627\u0644\u0646\u0637\u0627\u0642\u064a \u0628\u0648\u0636\u0648\u062d: \u062a\u0646\u0635 \u0627\u0644\u062c\u0632\u0621 9 \u0639\u0644\u0649 \u0623\u0646 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0647\u0627 \u062a\u0641\u062a\u0631\u0636 \u062a\u062f\u0641\u0642\u064b\u0627 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631\u060c \u0628\u064a\u0646\u0645\u0627 <a href=\"https:\/\/www.iso.org\/standard\/76057.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">ISO 4126-10:2024<\/a> \u062a\u062a\u0646\u0627\u0648\u0644 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644 \u062d\u0633\u0627\u0628 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\u0627\u0644\u0645\u0637\u0628\u0642.<\/strong><\/p>\n<p>\u062a\u0623\u062a\u064a \u0627\u0644\u0646\u0633\u0628\u0629 \u0627\u0644\u0645\u0626\u0648\u064a\u0629 \u0628\u0639\u062f \u062a\u0644\u0643 \u0627\u0644\u0623\u0633\u0626\u0644\u0629.<\/p>\n<h3>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0647\u0646\u062f\u0633\u064a \u062a\u0648\u0636\u064a\u062d\u064a: \u0631\u0642\u0645 \u0648\u0627\u062d\u062f\u060c \u0623\u0633\u0627\u0633\u0627\u0646 \u0645\u062e\u062a\u0644\u0641\u0627\u0646 \u0644\u0644\u062a\u062f\u0641\u0642<\/h3>\n<p>\u062a\u062e\u064a\u0644 \u0648\u0631\u0642\u0629 \u0639\u0645\u0644 \u0644\u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0645\u062f\u062e\u0644 \u062a\u064f\u0628\u0644\u063a \u0639\u0646 \u0646\u0633\u0628\u0629 \u0645\u0626\u0648\u064a\u0629 \u0639\u0646\u062f \u0633\u0639\u0629 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u060c,<br \/>\n\u0628\u064a\u0646\u0645\u0627 \u064a\u062a\u0637\u0644\u0628 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\/>\n\u0648\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0645\u0627\u0626\u0639\u060c \u0648\u0633\u0639\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u062e\u062a\u0627\u0631\u0629\u060c \u0648\u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u060c \u0648\u0645\u0631\u062c\u0639 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637\u060c \u0648<br \/>\n\u0627\u0644\u0628\u0646\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647 \u0623\u0648 \u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629. \u0647\u0630\u0627 \u0644\u0644\u062a\u0648\u0636\u064a\u062d \u0641\u0642\u0637\u061b \u0648\u0644\u064a\u0633 \u0627\u062f\u0639\u0627\u0621\u064b<br \/>\n\u0628\u0623\u0646 \u0623\u0633\u0627\u0633 \u062a\u062f\u0641\u0642 \u0648\u0627\u062d\u062f \u064a\u0646\u0637\u0628\u0642 \u0639\u0644\u0649 \u0643\u0644 \u062a\u0643\u0648\u064a\u0646.<\/p>\n<\/section>\n<section aria-labelledby=\"why-inlet-loss-affects-stability\">\n<h2 id=\"why-inlet-loss-affects-stability\">\u0644\u0645\u0627\u0630\u0627 \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\u0645\u062f\u062e\u0644 \u0639\u0644\u0649 \u0627\u0633\u062a\u0642\u0631\u0627\u0631 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646<\/h2>\n<p>\u064a\u0635\u0628\u062d \u0633\u0628\u0628 \u0623\u0647\u0645\u064a\u0629 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0623\u0648\u0636\u062d \u0628\u0645\u062c\u0631\u062f \u0623\u0646 \u064a\u0628\u062f\u0623 \u0627\u0644\u0635\u0645\u0627\u0645 \u0641\u064a \u0627\u0644\u062a\u0635\u0631\u064a\u0641.<\/p>\n<p>\u0642\u0628\u0644 \u062d\u062f\u0648\u062b \u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633\u060c \u0642\u062f \u064a\u0643\u0648\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a \u0648\u0639\u0646\u062f \u0645\u062f\u062e\u0644 \u0627\u0644\u0635\u0645\u0627\u0645 \u0645\u062a\u0642\u0627\u0631\u0628\u064a\u0646 \u0646\u0633\u0628\u064a\u064b\u0627\u060c \u0628\u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u0633\u0627\u0643\u0646\u0629 \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629. \u0648\u0628\u0645\u062c\u0631\u062f \u0623\u0646 \u064a\u062a\u0637\u0648\u0631 \u062a\u062f\u0641\u0642 \u062a\u0635\u0631\u064a\u0641 \u0643\u0628\u064a\u0631\u060c \u064a\u064f\u062d\u062f\u062b \u0627\u0644\u0627\u062d\u062a\u0643\u0627\u0643 \u0648\u0627\u0644\u0627\u0636\u0637\u0631\u0627\u0628 \u0641\u064a \u0645\u0633\u0627\u0631 \u0627\u0644\u0645\u062f\u062e\u0644 \u0641\u0642\u062f\u0627\u0646\u064b\u0627 \u063a\u064a\u0631 \u0642\u0627\u0628\u0644 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f \u0641\u064a \u0627\u0644\u0636\u063a\u0637.<\/p>\n<p>\u062d\u064a\u0646\u0647\u0627 \u0642\u062f \u064a\u062a\u0639\u0631\u0636 \u0627\u0644\u0635\u0645\u0627\u0645 \u0644\u0636\u063a\u0637 \u0645\u062f\u062e\u0644 \u0623\u0642\u0644 \u0645\u0646 \u0636\u063a\u0637 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629.<\/p>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0645\u062d\u0645\u0644 \u0628\u0646\u0627\u0628\u0636 \u0645\u0628\u0627\u0634\u0631\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062a\u0641\u0627\u0639\u0644 \u0647\u0630\u0627 \u0627\u0644\u062a\u063a\u064a\u0631 \u0645\u0639 \u062a\u0648\u0627\u0632\u0646 \u0627\u0644\u0642\u0648\u0649 \u0627\u0644\u0630\u064a \u064a\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u0641\u062a\u062d \u0648\u0627\u0644\u0631\u0641\u0639 \u0648\u0625\u0639\u0627\u062f\u0629 \u0627\u0644\u0625\u063a\u0644\u0627\u0642. \u0648\u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0627\u0644\u0645\u0628\u0633\u0637 \u0647\u0648:<\/p>\n<p><strong>\u0627\u0631\u062a\u0641\u0627\u0639 \u0636\u063a\u0637 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a \u2190 \u0641\u062a\u062d \u0627\u0644\u0635\u0645\u0627\u0645 \u2190 \u0632\u064a\u0627\u062f\u0629 \u062a\u062f\u0641\u0642 \u0627\u0644\u062a\u0635\u0631\u064a\u0641 \u2190 \u0632\u064a\u0627\u062f\u0629 \u0641\u0648\u0627\u0642\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u2190 \u062a\u063a\u064a\u0631 \u0636\u063a\u0637 \u0645\u062f\u062e\u0644 \u0627\u0644\u0635\u0645\u0627\u0645 \u2190 \u062a\u063a\u064a\u0631 \u0627\u0633\u062a\u062c\u0627\u0628\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u2190 \u062a\u063a\u064a\u0631 \u0627\u0644\u062a\u062f\u0641\u0642 \u0645\u0631\u0629 \u0623\u062e\u0631\u0649.<\/strong><\/p>\n<p>\u0641\u064a \u0638\u0644 \u062a\u0631\u0643\u064a\u0628\u0627\u062a \u063a\u064a\u0631 \u0645\u0648\u0627\u062a\u064a\u0629 \u0645\u0646 \u0633\u0644\u0648\u0643 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0648\u0627\u0644\u0635\u0645\u0627\u0645\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0633\u0647\u0645 \u0647\u0630\u0647 \u0627\u0644\u062a\u063a\u0630\u064a\u0629 \u0627\u0644\u0631\u0627\u062c\u0639\u0629 \u0641\u064a \u062a\u0634\u063a\u064a\u0644 \u063a\u064a\u0631 \u0645\u0633\u062a\u0642\u0631.<\/p>\n<p>\u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0644\u0627 \u064a\u0632\u0627\u0644 \u0645\u0646 \u063a\u064a\u0631 \u0627\u0644\u0635\u062d\u064a\u062d \u062a\u062d\u0648\u064a\u0644 \u0647\u0630\u0647 \u0627\u0644\u0622\u0644\u064a\u0629 \u0625\u0644\u0649 \u201c\u0641\u0648\u0642 3%\u060c \u064a\u0637\u0631\u0642 \u0627\u0644\u0635\u0645\u0627\u0645\u201d. \u0641\u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0644\u064a\u0633 \u0633\u0648\u0649 \u062c\u0632\u0621 \u0648\u0627\u062d\u062f \u0645\u0646 \u0627\u0644\u0646\u0638\u0627\u0645. \u0643\u0645\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062b\u0631 \u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u0627\u0644\u0637\u0644\u0628 \u0639\u0644\u0649 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0639\u0646\u062f \u0627\u0644\u0645\u062e\u0631\u062c \u0648\u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0648\u0627\u0644\u062a\u0641\u0627\u0639\u0644\u0627\u062a \u0627\u0644\u062f\u064a\u0646\u0627\u0645\u064a\u0643\u064a\u0629 \u0623\u0648 \u0627\u0644\u0635\u0648\u062a\u064a\u0629 \u0639\u0644\u0649 \u0627\u0644\u0627\u0633\u062a\u0642\u0631\u0627\u0631.<\/p>\n<p>\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0639\u0646\u062f \u0627\u0644\u0645\u062e\u0631\u062c \u0645\u062a\u063a\u064a\u0631 \u0647\u0646\u062f\u0633\u064a \u0645\u0646\u0641\u0635\u0644 \u0639\u0646 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644. \u0648\u064a\u0646\u0628\u063a\u064a \u0644\u0644\u0642\u0631\u0627\u0621 \u0627\u0644\u0630\u064a\u0646 \u064a\u0628\u062d\u062b\u0648\u0646 \u0641\u064a \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0633\u0641\u0644\u064a (\u0627\u0644\u0645\u0635\u0628) \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062f\u0644\u064a\u0644 \u0627\u0644\u0645\u062e\u0635\u0635 <a href=\"https:\/\/zobai.com\/ar\/blog\/back-pressure-spring-loaded-safety-valve\/\">\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0641\u064a \u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u0645\u062d\u0645\u0644\u0629 \u0628\u0646\u0627\u0628\u0636<\/a> \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0644\u062c\u0645\u0639 \u0628\u064a\u0646 \u0627\u0644\u062d\u0633\u0627\u0628\u064a\u0646.<\/p>\n<p>\u064a\u062e\u0644\u0642 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0645\u062f\u062e\u0644 \u0623\u064a\u0636\u064b\u0627 \u0645\u0634\u0643\u0644\u0629 \u062b\u0627\u0646\u064a\u0629 \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0623\u0646 \u062a\u062e\u062a\u0641\u064a \u062f\u0627\u062e\u0644 \u0645\u0646\u0627\u0642\u0634\u0629 \u0627\u0644\u0627\u0647\u062a\u0632\u0627\u0632: <strong>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/strong>.<\/p>\n<p>\u064a\u0642\u0644\u0644 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u063a\u064a\u0631 \u0627\u0644\u0642\u0627\u0628\u0644 \u0644\u0644\u0627\u0633\u062a\u0631\u062f\u0627\u062f \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u062a\u0627\u062d \u0639\u0646\u062f \u0645\u062f\u062e\u0644 \u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u062f\u0641\u0642. \u0648\u062d\u064a\u062b\u0645\u0627 \u064a\u0643\u0648\u0646 \u0647\u0630\u0627 \u0627\u0644\u062a\u0623\u062b\u064a\u0631 \u062c\u0648\u0647\u0631\u064a\u064b\u0627\u060c \u064a\u062c\u0628 \u0641\u062d\u0635 \u062a\u0623\u062b\u064a\u0631 \u0627\u0644\u0633\u0639\u0629 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644.<\/p>\n<p>\u0648\u0647\u0630\u0627 \u064a\u0639\u0637\u064a \u0627\u0644\u0645\u0647\u0646\u062f\u0633 \u0633\u0624\u0627\u0644\u064a\u0646 \u0645\u062e\u062a\u0644\u0641\u064a\u0646:<\/p>\n<p><strong>\u0647\u0644 \u0645\u0646 \u0627\u0644\u0645\u062a\u0648\u0642\u0639 \u0623\u0646 \u064a\u0639\u0645\u0644 \u0627\u0644\u0635\u0645\u0627\u0645\/\u0627\u0644\u0646\u0638\u0627\u0645 \u0628\u0634\u0643\u0644 \u0645\u0633\u062a\u0642\u0631\u061f<\/strong><\/p>\n<p><strong>\u0647\u0644 \u0644\u0627 \u064a\u0632\u0627\u0644 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u0631\u0643\u0628 \u0642\u0627\u062f\u0631\u064b\u0627 \u0639\u0644\u0649 \u062a\u0648\u0641\u064a\u0631 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0639\u0646\u062f \u0638\u0631\u0648\u0641 \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0641\u0639\u0644\u064a\u0629\u061f<\/strong><\/p>\n<p>\u0627\u062c\u062a\u064a\u0627\u0632 \u0623\u062d\u062f \u0627\u0644\u0641\u062d\u0635\u064a\u0646 \u0644\u0627 \u064a\u062c\u064a\u0628 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u0622\u062e\u0631.<\/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\/inlet-pressure-loss-safety-valve-img-01.webp\" alt=\"\u0643\u064a\u0641 \u064a\u063a\u064a\u0651\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0646\u0627\u062a\u062c \u0639\u0646 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0623\u062b\u0646\u0627\u0621 \u062a\u062f\u0641\u0642 \u0627\u0644\u062a\u0646\u0641\u064a\u0633.\" title=\"Safety Valve Inlet Pressure Loss: Why 3% Rules Are Not Universal - IMG-01\" width=\"1200\" height=\"900\" class=\"wp-image-56859\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-01-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u0643\u064a\u0641 \u064a\u063a\u064a\u0651\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0646\u0627\u062a\u062c \u0639\u0646 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0623\u062b\u0646\u0627\u0621 \u062a\u062f\u0641\u0642 \u0627\u0644\u062a\u0646\u0641\u064a\u0633.<\/figcaption><\/figure>\n<\/section>\n<section aria-labelledby=\"when-3-percent-is-not-whole-decision\">\n<h2 id=\"when-3-percent-is-not-whole-decision\">\u0639\u0646\u062f\u0645\u0627 \u0644\u0627 \u064a\u0643\u0648\u0646 \u0645\u0639\u064a\u0627\u0631 3% \u0627\u0644\u0645\u0623\u0644\u0648\u0641 \u0647\u0648 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u0643\u0627\u0645\u0644<\/h2>\n<p>\u201c\u063a\u064a\u0631 \u0639\u0627\u0644\u0645\u064a\u201d \u0644\u0627 \u064a\u0639\u0646\u064a \u201c\u064a\u0645\u0643\u0646 \u062a\u062c\u0627\u0647\u0644 3%\u201d. \u0628\u0644 \u064a\u0639\u0646\u064a \u0623\u0646 \u0623\u0637\u0631 \u0627\u0644\u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0645\u0639\u062a\u0631\u0641 \u0628\u0647\u0627 \u062a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u062d\u0627\u0644\u0627\u062a \u062a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u0646\u0637\u0627\u0642 \u062d\u064a\u062b \u0644\u0627 \u062a\u0643\u062a\u0645\u0644 \u0639\u0645\u0644\u064a\u0629 \u0627\u062a\u062e\u0627\u0630 \u0627\u0644\u0642\u0631\u0627\u0631 \u0628\u0645\u0642\u0627\u0631\u0646\u0629 \u0628\u0633\u064a\u0637\u0629 \u0645\u0639 \u0642\u064a\u0645\u0629 \u0627\u0644\u0641\u0631\u0632 \u0627\u0644\u0645\u0623\u0644\u0648\u0641\u0629.<\/p>\n<h3>\u0642\u062f \u064a\u062a\u0637\u0644\u0628 \u062a\u0631\u0643\u064a\u0628 \u0645\u0639\u064a\u0646 \u062a\u062d\u0644\u064a\u0644\u064b\u0627 \u0647\u0646\u062f\u0633\u064a\u064b\u0627 \u0645\u0648\u062b\u0642\u064b\u0627<\/h3>\n<p>\u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u0631\u0633\u0645\u064a\u0629 \u0644\u0640 API \u062d\u0648\u0644 <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\u060c \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0633\u0627\u0628\u0639<\/a> \u064a\u0624\u0643\u062f \u0623\u0646 \u0627\u0644\u0625\u0635\u062f\u0627\u0631 \u0627\u0644\u0645\u0646\u0634\u0648\u0631 \u0642\u062f \u0623\u062f\u062e\u0644 \u062a\u062d\u0644\u064a\u0644\u064b\u0627 \u0647\u0646\u062f\u0633\u064a\u064b\u0627 \u0644\u062a\u0642\u064a\u064a\u0645 \u0645\u0646\u0634\u0622\u062a \u0623\u062c\u0647\u0632\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637.<\/p>\n<p>\u0636\u0645\u0646 API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a\u060c \u064a\u0645\u0643\u0646 \u0644\u0647\u0630\u0627 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0646\u0634\u0623\u0629 \u0623\u0646 \u064a\u062a\u062c\u0627\u0648\u0632 \u0646\u0633\u0628\u0629 \u0641\u0642\u062f\u0627\u0646 \u0627\u062d\u062a\u0643\u0627\u0643 \u0648\u0627\u062d\u062f\u0629\u060c \u0648\u0623\u0646 \u064a\u0631\u0627\u0639\u064a\u060c \u062d\u064a\u062b \u064a\u0646\u0637\u0628\u0642\u060c \u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u0633\u0639\u0629 \u0648\u0633\u0644\u0648\u0643 \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u062a\u0648\u0627\u0632\u0646 \u0627\u0644\u0642\u0648\u0649 \u0648\u0627\u0633\u062a\u062c\u0627\u0628\u0629 \u0627\u0644\u0646\u0638\u0627\u0645 \u0648\u0633\u062c\u0644 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0623\u0648 \u0627\u0644\u062a\u0641\u0627\u0639\u0644 \u0627\u0644\u062f\u064a\u0646\u0627\u0645\u064a\u0643\u064a.<\/p>\n<p>\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u062a\u0642\u062f\u064a\u0645 \u0630\u0644\u0643 \u0639\u0644\u0649 \u0623\u0646\u0647 \u201c\u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u064a\u062a\u064a\u062d \u0644\u0644\u0645\u0647\u0646\u062f\u0633\u064a\u0646 \u062a\u062c\u0627\u0647\u0644 3%\u201d. \u0641\u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0645\u0648\u062c\u0648\u062f \u0644\u062a\u062d\u062f\u064a\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a <strong>\u0627\u0644\u0645\u0646\u0634\u0623\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629<\/strong> \u0644\u062f\u064a\u0647\u0627 \u0623\u0633\u0627\u0633 \u062a\u0642\u0646\u064a \u064a\u0645\u0643\u0646 \u0627\u0644\u062f\u0641\u0627\u0639 \u0639\u0646\u0647.<\/p>\n<p>\u062a\u063a\u064a\u0651\u0631 \u062d\u0627\u0644\u0627\u062a \u0627\u0644\u0633\u0644\u0648\u0643 \u063a\u064a\u0631 \u0627\u0644\u0645\u0633\u062a\u0642\u0631 \u0627\u0644\u0645\u0639\u0631\u0648\u0641\u0629 \u0647\u0630\u0627 \u0627\u0644\u0642\u0631\u0627\u0631. \u0648\u0641\u064a \u0625\u0637\u0627\u0631 \u0627\u0644\u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0648\u0641\u0642 API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0647\u0646\u0627\u060c \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0645\u062c\u0631\u062f \u0625\u0639\u0627\u062f\u0629 \u062a\u0635\u0646\u064a\u0641 \u0645\u0646\u0634\u0623\u0629 \u0642\u0627\u0626\u0645\u0629 \u0644\u062f\u064a\u0647\u0627 \u0623\u062f\u0644\u0629 \u0645\u0648\u062b\u0648\u0642\u0629 \u0639\u0644\u0649 \u0627\u0644\u0627\u0647\u062a\u0632\u0627\u0632 (chatter) \u0639\u0644\u0649 \u0623\u0646\u0647\u0627 \u0645\u0642\u0628\u0648\u0644\u0629 \u0644\u0645\u062c\u0631\u062f \u0625\u0645\u0643\u0627\u0646\u064a\u0629 \u0625\u0646\u062a\u0627\u062c \u062d\u0633\u0627\u0628 \u0644\u0627\u062d\u0642.<\/p>\n<h3>\u062e\u062f\u0645\u0629 \u0627\u0644\u062a\u0645\u062f\u062f \u0627\u0644\u062d\u0631\u0627\u0631\u064a \u0627\u0644\u0645\u062d\u062f\u0648\u062f\u0629 \u062a\u062a\u0637\u0644\u0628 \u062a\u0641\u0633\u064a\u0631\u064b\u0627 \u0645\u062d\u062f\u0648\u062f\u064b\u0627<\/h3>\n<p>\u064a\u0639\u0627\u0644\u062c API 520 \u0627\u0644\u062c\u0632\u0621 \u0627\u0644\u062b\u0627\u0646\u064a \u0623\u064a\u0636\u064b\u0627 \u062d\u0627\u0644\u0629 \u0645\u062d\u062f\u0648\u062f\u0629 \u0627\u0644\u0646\u0637\u0627\u0642 \u062a\u062a\u0639\u0644\u0642 \u0628\u0627\u0644\u062a\u0645\u062f\u062f \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a \u0644\u0644\u0633\u0627\u0626\u0644 \u0627\u0644\u0646\u0627\u062a\u062c \u0641\u0642\u0637 \u0639\u0646 \u0627\u0644\u062a\u0633\u062e\u064a\u0646 \u0627\u0644\u0645\u062d\u064a\u0637 \u0628\u0634\u0643\u0644 \u0645\u062e\u062a\u0644\u0641 \u0639\u0646 \u0645\u0633\u0627\u0631 \u0641\u062d\u0635 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0639\u0627\u0645.<\/p>\n<p>\u0627\u0644\u0643\u0644\u0645\u0629 <em>\u0641\u0642\u0637<\/em> \u0623\u0645\u0631 \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629.<\/p>\n<p>\u064a\u062c\u0628 \u0623\u0644\u0627 \u064a\u064f\u0648\u0633\u064e\u0651\u0639 \u0647\u0630\u0627 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0646\u0641\u0633\u0647 \u0628\u0635\u0645\u062a \u0644\u064a\u0634\u0645\u0644 \u0643\u0644 \u062e\u0637 \u0633\u0627\u0626\u0644 \u0645\u0639\u0632\u0648\u0644\u060c \u0648\u0643\u0644 \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u062d\u0631\u0627\u0631\u064a\u060c \u0648\u0627\u0644\u062a\u0633\u062e\u064a\u0646 \u0627\u0644\u0635\u0646\u0627\u0639\u064a \u0627\u0644\u0630\u064a \u0642\u062f \u064a\u0628\u062e\u0651\u0631 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\/>\n\u0645\u062a\u0635\u0644 \u0639\u0628\u0631 \u0645\u062f\u062e\u0644 \u0630\u064a \u0645\u0642\u0627\u0648\u0645\u0629 \u062a\u062f\u0641\u0642. \u0642\u062f \u064a\u062a\u062c\u0646\u0628 \u0645\u0648\u0642\u0639 \u0627\u0644\u0627\u0633\u062a\u0634\u0639\u0627\u0631 \u0645\u0634\u0643\u0644\u0629 \u0648\u0627\u062d\u062f\u0629 \u0641\u064a \u0625\u0634\u0627\u0631\u0629<br \/>\n\u0627\u0644\u062a\u062d\u0643\u0645\u060c \u0644\u0643\u0646\u0647 \u0644\u0627 \u064a\u0632\u064a\u0644 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u0641\u0642\u0648\u062f \u0628\u064a\u0646 \u0627\u0644\u0648\u0639\u0627\u0621 \u0648\u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0623\u062b\u0646\u0627\u0621<br \/>\n\u0627\u0644\u062a\u0646\u0641\u064a\u0633. \u0644\u0630\u0644\u0643 \u062a\u062d\u062a\u0627\u062c \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0625\u0644\u0649 \u0643\u0644 \u0645\u0646 \u0645\u062e\u0637\u0637 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\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0647\u0627 \u062a\u0641\u062a\u0631\u0636 \u062a\u0635\u0631\u064a\u0641\u064b\u0627 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631\u060c \u0628\u064a\u0646\u0645\u0627 \u062a\u062a\u0646\u0627\u0648\u0644 ISO 4126-10:2024 \u062d\u0633\u0627\u0628 \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0644\u0644\u062a\u062f\u0641\u0642 \u062b\u0646\u0627\u0626\u064a \u0627\u0644\u0637\u0648\u0631 \u063a\u0627\u0632\/\u0633\u0627\u0626\u0644.<\/p>\n<p>\u0648\u0647\u0630\u0627 \u064a\u062f\u0639\u0645 <strong>\u062d\u062f\u0648\u062f \u0627\u0644\u0646\u0637\u0627\u0642<\/strong>, \u060c \u0648\u0644\u064a\u0633 \u0642\u0627\u0639\u062f\u0629 \u062b\u0627\u0646\u064a\u0629 \u0645\u064f\u062e\u062a\u0644\u0642\u0629 \u201c\u062b\u0646\u0627\u0626\u064a\u0629 \u0627\u0644\u0637\u0648\u0631 3%\u201d.\u201d<\/p>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u062b\u0646\u0627\u0626\u064a\u0629 \u0627\u0644\u0637\u0648\u0631\u060c \u0641\u0625\u0646 \u0627\u0644\u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u0635\u062d\u064a\u062d \u0647\u0648 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627\u060c \u0648\u0644\u064a\u0633 \u0646\u0642\u0644 \u0642\u0627\u0639\u062f\u0629 \u0623\u062d\u0627\u062f\u064a\u0629 \u0627\u0644\u0637\u0648\u0631 \u062f\u0648\u0646 \u062a\u063a\u064a\u064a\u0631 \u0623\u0648 \u0627\u062e\u062a\u0644\u0627\u0642 \u0646\u0633\u0628\u0629 \u0628\u062f\u064a\u0644\u0629.<\/p>\n<p>\u0639\u0628\u0631 \u0647\u0630\u0647 \u0627\u0644\u0623\u0645\u062b\u0644\u0629\u060c \u064a\u0638\u0644 \u0627\u0644\u0645\u0628\u062f\u0623 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0645\u062a\u0633\u0642\u064b\u0627: <strong>\u0644\u0627 \u062a\u0628\u062d\u062b \u0639\u0646 \u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0644\u0640 3%\u061b \u0628\u0644 \u062d\u062f\u062f \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u062d\u0627\u0643\u0645 \u0627\u0644\u0641\u0639\u0644\u064a \u0644\u0644\u062c\u0647\u0627\u0632 \u0648\u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0627\u0633\u062a\u0634\u0639\u0627\u0631 \u0648\u0627\u0644\u062a\u0631\u0643\u064a\u0628.<\/strong><\/p>\n<\/section>\n<section aria-labelledby=\"review-installation-above-criterion\">\n<h2 id=\"review-installation-above-criterion\">\u0643\u064a\u0641\u064a\u0629 \u0645\u0631\u0627\u062c\u0639\u0629 \u062a\u0631\u0643\u064a\u0628 \u064a\u062a\u062c\u0627\u0648\u0632 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u0645\u0623\u0644\u0648\u0641<\/h2>\n<p>\u0646\u062a\u064a\u062c\u0629 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u062a\u064a \u062a\u062a\u062c\u0627\u0648\u0632 \u0642\u064a\u0645\u0629 \u0627\u0644\u0641\u0631\u0632 \u0627\u0644\u0645\u0623\u0644\u0648\u0641\u0629 \u0647\u064a \u0633\u0628\u0628 \u0644\u0644\u062a\u062d\u0642\u064a\u0642. \u0648\u0647\u064a \u0644\u064a\u0633\u062a \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0643\u0627\u0641\u064a\u0629 \u0644\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0639\u0644\u0649 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0623\u0648 \u0631\u0641\u0636\u0647.<\/p>\n<h3>1. \u062a\u062d\u0642\u0642 \u0645\u0646 \u0623\u0646 \u062d\u0633\u0627\u0628 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0642\u0627\u0628\u0644 \u0644\u0644\u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u0639 \u0627\u0644\u0645\u0639\u064a\u0627\u0631<\/h3>\n<p>\u062a\u062d\u0642\u0642 \u0645\u0646 \u062d\u062f\u0648\u062f \u0627\u0644\u062d\u0633\u0627\u0628 \u0648\u0647\u0646\u062f\u0633\u0629 \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u0645\u062f\u062e\u0644 \u0648\u0627\u0644\u0648\u0635\u0644\u0627\u062a \u0648\u0627\u0644\u0645\u062e\u0641\u0636\u0627\u062a \u0648\u0627\u0644\u0642\u064a\u0648\u062f \u0648\u062e\u0648\u0627\u0635 \u0627\u0644\u0645\u0627\u0626\u0639 \u0648\u0637\u0648\u0631 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0623\u064a \u062c\u0647\u0627\u0632 \u0645\u0646\u0628\u0639 \u064a\u0636\u064a\u0641 \u0645\u0642\u0627\u0648\u0645\u0629 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u0629.<\/p>\n<p>\u0642\u062f \u064a\u0643\u0648\u0646 \u062d\u0633\u0627\u0628 \u0647\u0628\u0648\u0637 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0635\u062d\u064a\u062d \u062a\u0642\u0646\u064a\u064b\u0627 \u0645\u0642\u0627\u0631\u0646\u0629 \u062e\u0627\u0637\u0626\u0629 \u0625\u0630\u0627 \u0627\u0633\u062a\u062e\u062f\u0645 \u0643\u0645\u064a\u0629 \u0636\u063a\u0637 \u0623\u0648 \u062d\u062f\u064b\u0627 \u0645\u062e\u062a\u0644\u0641\u064b\u0627 \u0639\u0646 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062d\u0627\u0643\u0645.<\/p>\n<p>\u0644\u0645\u0632\u064a\u062f \u0645\u0646 \u0627\u0639\u062a\u0628\u0627\u0631\u0627\u062a \u0647\u0646\u062f\u0633\u0629 \u0627\u0644\u0645\u0646\u0634\u0623\u0629 \u0648\u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0623\u0648\u0633\u0639\u060c \u0631\u0627\u062c\u0639 <a href=\"https:\/\/zobai.com\/ar\/engineering\/safety-valve-installation-guide\/\">\u062f\u0644\u064a\u0644 \u062a\u0631\u0643\u064a\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646<\/a>.<\/p>\n<h3>2. \u062d\u062f\u062f \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u062f\u0641\u0642 \u0635\u0631\u0627\u062d\u0629\u064b<\/h3>\n<p>\u062a\u0623\u0643\u062f \u0645\u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u062d\u0633\u0627\u0628 \u064a\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0642\u062f\u0631\u0629\u060c \u0623\u0648 \u0645\u0639\u062f\u0644 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0644\u0644\u062a\u0646\u0641\u064a\u0633\u060c \u0623\u0648 \u0623\u064a \u0623\u0633\u0627\u0633 \u0622\u062e\u0631 \u0645\u0633\u0645\u0648\u062d \u0628\u0647 \u0644\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0641\u0639\u0644\u064a \u0648\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0642\u064a\u064a\u0645.<\/p>\n<p>\u0644\u0627 \u062a\u062e\u0641\u0650 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636 \u062f\u0627\u062e\u0644 \u0628\u0631\u0646\u0627\u0645\u062c \u0627\u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a \u0623\u0648 \u0648\u0631\u0642\u0629 \u0627\u0644\u062d\u0633\u0627\u0628\u0627\u062a. \u0641\u0647\u0648 \u0623\u062d\u062f \u0627\u0644\u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u063a\u064a\u0651\u0631 \u0627\u0644\u0641\u0627\u0642\u062f \u0627\u0644\u0645\u064f\u0628\u0644\u064e\u0651\u063a \u0639\u0646\u0647 \u062a\u063a\u064a\u064a\u0631\u064b\u0627 \u062c\u0648\u0647\u0631\u064a\u064b\u0627.<\/p>\n<h3>3. \u062a\u062d\u0642\u0642 \u0645\u0646 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644<\/h3>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u0641\u0627\u0642\u062f \u0641\u064a \u0627\u0644\u0645\u062f\u062e\u0644 \u0643\u0628\u064a\u0631\u064b\u0627\u060c \u0641\u062d\u062f\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0636\u063a\u0637 \u0627\u0644\u0645\u062f\u062e\u0644 \u0627\u0644\u0645\u0631\u0643\u0651\u0628 \u064a\u063a\u064a\u0651\u0631 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062a\u0627\u062d\u0629.<\/p>\n<p>\u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u062d\u0642\u064a\u0642\u064a \u064a\u062a\u0639\u0644\u0642 \u0628\u0627\u0644\u0641\u062a\u062d\u0629 \u0648\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0648\u0644\u064a\u0633 \u0628\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u062f\u062e\u0644 \u0648\u062d\u062f\u0647\u0627\u060c \u0641\u0648\u062c\u0651\u0647 \u0647\u0630\u0627 \u0627\u0644\u0639\u0645\u0644 \u0625\u0644\u0649 <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>.<\/p>\n<p>\u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0627\u0633\u062a\u0642\u0631\u0627\u0631 \u0644\u064a\u0633 \u0628\u062f\u064a\u0644\u064b\u0627 \u0639\u0646 \u0641\u062d\u0635 \u0627\u0644\u0633\u0639\u0629 \u0647\u0630\u0627.<\/p>\n<h3>4. \u062a\u0623\u0643\u062f \u0645\u0646 \u0628\u0646\u064a\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0627\u0633\u062a\u0634\u0639\u0627\u0631<\/h3>\n<p>\u062d\u062f\u062f \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0645\u062d\u0645\u0644\u064b\u0627 \u0628\u0646\u0627\u0628\u0636 \u062a\u0642\u0644\u064a\u062f\u064a\u060c \u0623\u0648 \u0645\u062a\u0648\u0627\u0632\u0646\u064b\u0627\u060c \u0623\u0648 \u064a\u0639\u0645\u0644 \u0628\u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a\u060c \u0623\u0648 \u064a\u064f\u0633\u062a\u0634\u0639\u0631 \u0645\u062d\u0644\u064a\u064b\u0627\u060c \u0623\u0648 \u064a\u064f\u0633\u062a\u0634\u0639\u0631 \u0639\u0646 \u0628\u064f\u0639\u062f.<\/p>\n<p>\u062d\u064a\u062b \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0645\u062a\u0642\u062f\u0645 \u0639\u0644\u0649 \u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0641\u062a\u062d \u0623\u0648 \u0627\u0644\u0625\u063a\u0644\u0627\u0642 \u0623\u0648 \u0627\u0644\u0628\u0627\u064a\u0644\u0648\u062a\u060c \u0641\u0625\u0646 \u0627\u0644\u0623\u0648\u0635\u0627\u0641 \u0627\u0644\u0639\u0627\u0645\u0629 \u0644\u0646\u0648\u0639 \u0627\u0644\u0635\u0645\u0627\u0645 \u0644\u0627 \u062a\u0643\u0641\u064a. \u0642\u062f \u062a\u0643\u0648\u0646 \u0647\u0646\u0627\u0643 \u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u062e\u0627\u0635\u0629 \u0628\u0627\u0644\u062c\u0647\u0627\u0632 \u0645\u0646 \u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629.<\/p>\n<h3>5. \u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0633\u062c\u0644 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0643\u062f\u0644\u064a\u0644\u060c \u0644\u0627 \u0643\u0625\u062b\u0628\u0627\u062a \u0644\u0643\u0644 \u062d\u0627\u0644\u0629 \u0645\u0633\u062a\u0642\u0628\u0644\u064a\u0629<\/h3>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0642\u0627\u0626\u0645\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0634\u0645\u0644 \u0627\u0644\u0633\u062c\u0644\u0627\u062a \u0627\u0644\u0645\u0641\u064a\u062f\u0629 \u0623\u062d\u062f\u0627\u062b \u0627\u0644\u0631\u0641\u0639 \u0627\u0644\u0641\u0639\u0644\u064a\u0629\u060c \u0648\u0646\u062a\u0627\u0626\u062c \u0627\u0644\u0641\u062d\u0635\u060c \u0648\u0633\u062c\u0644 \u0627\u0644\u0625\u0635\u0644\u0627\u062d\u060c \u0648\u0623\u062f\u0644\u0629 \u0639\u0644\u0649 \u062a\u0644\u0641 \u0627\u0644\u0645\u0642\u0627\u0639\u062f \u0623\u0648 \u0627\u0644\u0623\u062f\u0644\u0629 \u0623\u0648 \u0627\u0644\u0623\u062c\u0632\u0627\u0621 \u0627\u0644\u062f\u0627\u062e\u0644\u064a\u0629 \u0623\u0648 \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0631\u062a\u0628\u0637\u0629.<\/p>\n<p>\u0644\u0643\u0646 \u0639\u0628\u0627\u0631\u0629 \u201c\u0644\u0645 \u0646\u0631\u064e \u0627\u0647\u062a\u0632\u0627\u0632\u064b\u0627 \u0642\u0637\u201d \u0644\u0627 \u062a\u0639\u0627\u062f\u0644 \u0625\u062b\u0628\u0627\u062a \u0623\u0646 \u0627\u0644\u0646\u0638\u0627\u0645 \u0642\u062f \u0645\u0631\u0651 \u0628\u0646\u062c\u0627\u062d \u0628\u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0627\u0643\u0645\u0629.<\/p>\n<p>Conversely, credible evidence that the valve has chattered should materially change the decision. That condition deserves investigation and correction, not a paper justification based solely on a later calculation.<\/p>\n<h3>Illustrative engineering scenario: a valve with inspection evidence of instability<\/h3>\n<p>Suppose an existing valve has repeated seat and guide damage after documented lift<br \/>\nevents, while a later calculation reports an inlet loss just under the familiar screen.<br \/>\nThe calculation does not erase the field evidence. The team should investigate the<br \/>\nevent conditions, inspection findings, relief load, inlet and outlet hydraulics, and<br \/>\nvalve characteristics before accepting the installation. This is an illustrative<br \/>\ndiagnostic path, not a diagnosis of a specific plant.<\/p>\n<h3>6. Determine whether a recognized engineering-analysis route applies<\/h3>\n<p>Where the governing framework permits it, a documented analysis can examine the actual installation rather than relying on the default screening value alone.<\/p>\n<p>Depending on the method, that can require capacity correction, valve characteristics, force balance, pressure response, acoustic considerations, or operating evidence.<\/p>\n<p>The purpose is not to find a mathematical way around the rule. It is to answer a narrower question: <strong>Can this particular device and installation be shown to satisfy the applicable engineering basis?<\/strong><\/p>\n<h3>7. Change the installation when the evidence does not support it<\/h3>\n<p>Physical modification remains a valid\u2014and sometimes necessary\u2014outcome.<\/p>\n<p>Depending on the cause, the engineering response may involve reducing inlet length, removing avoidable restrictions, using lower-resistance fittings, increasing inlet diameter, better matching the selected relieving capacity to the required load, changing the protection arrangement, or evaluating a different valve\/sensing architecture.<\/p>\n<p>Those are options, not a universal repair recipe.<\/p>\n<p>An exceedance should therefore lead to <strong>verify \u2192 classify \u2192 assess \u2192 redesign if necessary<\/strong>, rather than \u201c3.1% \u2192 automatic failure\u201d or \u201cengineering analysis \u2192 automatic acceptance.\u201d<\/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\/inlet-pressure-loss-safety-valve-img-02.webp\" alt=\"Engineering review path for a safety valve installation with inlet pressure loss above the familiar screening criterion.\" title=\"Safety Valve Inlet Pressure Loss: Why 3% Rules Are Not Universal - IMG-02\" width=\"1200\" height=\"900\" class=\"wp-image-56860\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/inlet-pressure-loss-safety-valve-img-02-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>Engineering review path for a safety valve installation with inlet pressure loss above the familiar screening criterion.<\/figcaption><\/figure>\n<\/section>\n<section aria-labelledby=\"document-engineering-review-rfq\">\n<h2 id=\"document-engineering-review-rfq\">What to Document for Engineering Review or RFQ<\/h2>\n<p>An engineer or valve supplier cannot evaluate an inlet-pressure-loss concern reliably from valve size and set pressure alone.<\/p>\n<p>The review package should describe the protected system and the calculation that produced the concern.<\/p>\n<div class=\"zobai-table-scroll\" role=\"region\" aria-label=\"Safety valve inlet pressure loss engineering review inputs\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">\u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u062a\u0642\u062f\u064a\u0645\u0647\u0627<\/th>\n<th scope=\"col\">Why it affects the inlet-loss review<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Protected equipment \/ pressure boundary<\/td>\n<td>Defines where the inlet path begins<\/td>\n<\/tr>\n<tr>\n<td>Governing code, standard, and project specification<\/td>\n<td>Determines the applicable assessment basis<\/td>\n<\/tr>\n<tr>\n<td>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u062a\u0646\u0641\u064a\u0633 \u0645\u0648\u062b\u0648\u0642<\/td>\n<td>Defines the duty being reviewed<\/td>\n<\/tr>\n<tr>\n<td>\u0623\u0633\u0627\u0633 \u0636\u063a\u0637 \u0627\u0644\u0636\u0628\u0637<\/td>\n<td>Required to interpret percentage-based criteria<\/td>\n<\/tr>\n<tr>\n<td>\u0645\u0639\u062f\u0644 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628<\/td>\n<td>Defines the required protection duty<\/td>\n<\/tr>\n<tr>\n<td>Flow rate used in the inlet-loss calculation<\/td>\n<td>Reveals whether the hydraulic basis matches the selected method<\/td>\n<\/tr>\n<tr>\n<td>Fluid and relieving phase<\/td>\n<td>Affects hydraulics and standards scope<\/td>\n<\/tr>\n<tr>\n<td>Inlet piping layout \/ isometric<\/td>\n<td>Shows line length, elevation, routing, and restrictions<\/td>\n<\/tr>\n<tr>\n<td>Pipe sizes, reducers, fittings, and valves<\/td>\n<td>Establish the sources of nonrecoverable loss<\/td>\n<\/tr>\n<tr>\n<td>Rupture disk or other upstream device, if present<\/td>\n<td>May add hydraulic resistance<\/td>\n<\/tr>\n<tr>\n<td>Calculated inlet pressure loss and calculation method<\/td>\n<td>Shows the result and how it was obtained<\/td>\n<\/tr>\n<tr>\n<td>Relief-valve architecture<\/td>\n<td>Affects the applicable stability or analysis route<\/td>\n<\/tr>\n<tr>\n<td>Pilot sensing arrangement, where applicable<\/td>\n<td>Can change how protected-system pressure is sensed<\/td>\n<\/tr>\n<tr>\n<td>Device-specific operating data required by the selected analysis<\/td>\n<td>Prevents generic assumptions about actual valve behavior<\/td>\n<\/tr>\n<tr>\n<td>Lift, inspection, and repair history for an existing installation<\/td>\n<td>May reveal evidence relevant to stability assessment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>This is also where general technical guidance ends and product-specific evidence begins.<\/p>\n<p>A public article can explain the inlet-loss decision process. It cannot establish the dynamic behavior, remote-sensing arrangement, stability limit, allowable inlet pressure loss, or advanced-analysis data for a specific safety valve model unless those facts are documented for that model.<\/p>\n<p>So a supplier inquiry should not stop at: \u201cCan your valve work with more than 3% inlet pressure drop?\u201d<\/p>\n<p>A technically useful inquiry provides the relief duty, applicable standard, hydraulic calculation, valve configuration, and unresolved engineering question.<\/p>\n<aside class=\"zobai-engineering-cta\" aria-label=\"\u0645\u0631\u0627\u062c\u0639\u0629 \u0647\u0646\u062f\u0633\u064a\u0629\">\n<p><strong>Reviewing a specific inlet-pressure-loss exceedance?<\/strong><\/p>\n<p>Send the protected equipment, relief scenario, applicable standard, required flow, inlet piping layout, calculated pressure loss, and proposed valve configuration for technical review.<\/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 \u0623\u0645\u0627\u0646 ZOBAI<\/a><\/p>\n<\/aside>\n<\/section>\n<section aria-labelledby=\"inlet-loss-faq\">\n<h2 id=\"inlet-loss-faq\">\u0623\u0633\u0626\u0644\u0629 \u0645\u062a\u0643\u0631\u0631\u0629<\/h2>\n<h3>Does a calculated inlet loss below 3% prove the valve will not chatter?<\/h3>\n<p>No. It may satisfy an applicable hydraulic screening criterion, but stability also<br \/>\n  depends on valve characteristics, relief demand, outlet conditions and system dynamics.<br \/>\n  The calculation basis and device scope must be documented.<\/p>\n<h3>Must an installation above 3% always be rejected?<\/h3>\n<p>Not from that number alone. Check the governing standard and device configuration,<br \/>\n  verify that the loss was calculated on the correct basis, and determine whether a<br \/>\n  recognized engineering-analysis route applies. The final decision requires evidence<br \/>\n  for that installation; an analysis route is not automatic acceptance.<\/p>\n<h3>Does remote pilot sensing eliminate inlet pressure loss?<\/h3>\n<p>No. Remote sensing can change the pilot&#8217;s pressure signal, but the main valve still<br \/>\n  receives flow through its inlet path. Capacity and pilot-circuit behavior both need<br \/>\n  review against the actual configuration.<\/p>\n<h3>Which flow rate should be used in the inlet-loss calculation?<\/h3>\n<p>Use the flow basis required by the governing method for the specific device and<br \/>\n  relief scenario, and state it on the calculation. Do not assume that a figure calculated<br \/>\n  at required flow is interchangeable with one calculated at rated capacity.<\/p>\n<\/section>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>\u062a\u0639\u0631\u0651\u0641 \u0639\u0644\u0649 \u0633\u0628\u0628 \u0639\u062f\u0645 \u0643\u0648\u0646 \u0645\u0639\u064a\u0627\u0631 \u0641\u0642\u062f\u0627\u0646 \u0627\u0644\u0636\u063a\u0637 \u0639\u0646\u062f \u0627\u0644\u0645\u062f\u062e\u0644 3% \u0642\u0627\u0639\u062f\u0629 \u0642\u0628\u0648\u0644 \u0623\u0648 \u0631\u0641\u0636 \u0639\u0627\u0645\u0629\u060c \u0648\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062d\u062f\u062f \u0645\u062f\u0649 \u0627\u0646\u0637\u0628\u0627\u0642\u0647\u060c \u0648\u0643\u064a\u0641\u064a\u0629 \u0645\u0631\u0627\u062c\u0639\u0629 \u062a\u0631\u0643\u064a\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0639\u0646\u062f \u062a\u062c\u0627\u0648\u0632\u0647.<\/p>","protected":false},"author":2,"featured_media":56859,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[75],"tags":[],"class_list":["post-56804","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-installation-maintenance-troubleshooting"],"_links":{"self":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56804","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=56804"}],"version-history":[{"count":0,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56804\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media\/56859"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media?parent=56804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/categories?post=56804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/tags?post=56804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}