{"id":56658,"date":"2026-09-01T01:12:35","date_gmt":"2026-09-01T01:12:35","guid":{"rendered":"https:\/\/zobai.com\/?p=56658"},"modified":"2026-09-01T04:17:59","modified_gmt":"2026-09-01T04:17:59","slug":"pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases","status":"publish","type":"post","link":"https:\/\/zobai.com\/ar\/blog\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases\/","title":{"rendered":"\u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0645\u0642\u0627\u0628\u0644 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646: \u0645\u0647\u0627\u0645 \u0645\u062e\u062a\u0644\u0641\u0629 \u0648\u0623\u0633\u0633 \u062d\u0633\u0627\u0628 \u0645\u062e\u062a\u0644\u0641\u0629"},"content":{"rendered":"<style>\n.pvsv-article {\n  width: 100%;\n  max-width: 1080px;\n  margin-inline: auto;\n  font-family: inherit;\n  font-size: inherit;\n  line-height: 1.7;\n  color: inherit;\n}<\/p>\n<p>.pvsv-article,\n.pvsv-article * {\n  box-sizing: border-box;\n}<\/p>\n<p>.pvsv-article section {\n  margin-block: 2.75rem;\n}<\/p>\n<p>.pvsv-article h2,\n.pvsv-article h3 {\n  text-wrap: pretty;\n}<\/p>\n<p>.pvsv-article h2 {\n  margin: 0 0 1rem;\n  line-height: 1.25;\n}<\/p>\n<p>.pvsv-article h3 {\n  margin: 1.75rem 0 0.75rem;\n  line-height: 1.3;\n}<\/p>\n<p>.pvsv-article p {\n  margin: 0 0 1rem;\n}<\/p>\n<p>.pvsv-article ul,\n.pvsv-article ol {\n  margin: 0.75rem 0 1.25rem;\n  padding-inline-start: 1.4rem;\n}<\/p>\n<p>.pvsv-article li {\n  margin-block: 0.35rem;\n}<\/p>\n<p>.pvsv-article strong {\n  font-weight: 700;\n}<\/p>\n<p>.pvsv-article .pvsv-table-wrap {\n  width: 100%;\n  max-width: 100%;\n  margin: 1.25rem 0 1.5rem;\n  overflow-x: auto;\n  overscroll-behavior-inline: contain;\n  -webkit-overflow-scrolling: touch;\n}<\/p>\n<p>.pvsv-article .pvsv-table-wrap:focus-visible {\n  outline: 2px solid currentColor;\n  outline-offset: 3px;\n}<\/p>\n<p>.pvsv-article table {\n  width: 100%;\n  min-width: 720px;\n  border-collapse: collapse;\n}<\/p>\n<p>.pvsv-article caption {\n  margin-bottom: 0.75rem;\n  text-align: start;\n  font-weight: 700;\n}<\/p>\n<p>.pvsv-article th,\n.pvsv-article td {\n  padding: 0.75rem;\n  border: 1px solid currentColor;\n  text-align: start;\n  vertical-align: top;\n  overflow-wrap: anywhere;\n}<\/p>\n<p>.pvsv-article th {\n  font-weight: 700;\n}<\/p>\n<p>.pvsv-article .pvsv-triage {\n  margin-top: 1.5rem;\n  padding: 1rem;\n  border: 1px solid currentColor;\n}<\/p>\n<p>.pvsv-article .pvsv-triage > :last-child {\n  margin-bottom: 0;\n}<\/p>\n<p>@media (max-width: 640px) {\n  .pvsv-article section {\n    margin-block: 2rem;\n  }<\/p>\n<p>  .pvsv-article h2 {\n    line-height: 1.2;\n  }<\/p>\n<p>  .pvsv-article h3 {\n    line-height: 1.25;\n  }<\/p>\n<p>  .pvsv-article ul,\n  .pvsv-article ol {\n    padding-inline-start: 1.2rem;\n  }\n}\n<\/style>\n<article\n  class=\"pvsv-article\"\n  aria-label=\"\u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0645\u0642\u0627\u0628\u0644 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646: \u0645\u0647\u0627\u0645 \u0645\u062e\u062a\u0644\u0641\u0629 \u0648\u0623\u0633\u0633 \u062d\u0633\u0627\u0628 \u0645\u062e\u062a\u0644\u0641\u0629\"\n><\/p>\n<p>\n    \u064a\u0645\u0643\u0646 \u0644\u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0648\u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0643\u0644\u0627\u0647\u0645\u0627 \u0627\u0644\u0627\u0633\u062a\u062c\u0627\u0628\u0629 \u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u0636\u063a\u0637\u060c \u0644\u0643\u0646\u0647\u0645\u0627 \u064a\u062d\u0644\u0627\u0646 \u0645\u0634\u0627\u0643\u0644 \u062d\u0645\u0627\u064a\u0629 \u0645\u062e\u062a\u0644\u0641\u0629. \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629\u060c <strong>PVRV<\/strong> \u064a\u0639\u0646\u064a \u062c\u0647\u0627\u0632\u064b\u0627 \u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0643\u062c\u0632\u0621 \u0645\u0646 \u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0644\u062e\u0632\u0627\u0646 \u062a\u062e\u0632\u064a\u0646 \u062c\u0648\u064a \u0623\u0648 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0636\u063a\u0637. \u0648 <strong>\u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646<\/strong> \u064a\u0639\u0646\u064a \u062c\u0647\u0627\u0632 \u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u064a\u064f\u0637\u0628\u0642 \u0639\u0644\u0649 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629 \u0648\u0641\u0642\u064b\u0627 \u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0648\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647.\n  <\/p>\n<p>\n    \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u0627\u0644\u0639\u0645\u0644\u064a \u0644\u064a\u0633 \u0645\u062c\u0631\u062f \u0628\u0646\u0627\u0621 \u0627\u0644\u0635\u0645\u0627\u0645. \u0628\u0644 \u0647\u0648 \u0645\u0632\u064a\u062c \u0645\u0646 <strong>\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629\u060c \u0648\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u060c \u0648\u0627\u0644\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u062d\u0627\u0643\u0645\u060c \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0633\u0627\u0628<\/strong>.\n  <\/p>\n<p>\n    \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062a\u0637\u0644\u0628 \u0645\u0631\u0627\u062c\u0639\u0629 PVRV \u0644\u0644\u062e\u0632\u0627\u0646 \u062a\u0646\u0641\u064a\u0633\u064b\u0627 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u0648\u062a\u062f\u0641\u0642\u064b\u0627 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a\u060c \u0628\u064a\u0646\u0645\u0627 \u062a\u0638\u0644 \u0641\u062a\u062d\u0627\u062a \u0627\u0644\u062a\u0647\u0648\u064a\u0629 \u0627\u0644\u0639\u0627\u062f\u064a\u0629 \u0648\u0627\u0644\u0637\u0627\u0631\u0626\u0629 \u0644\u0644\u062e\u0632\u0627\u0646 \u0641\u062d\u0648\u0635\u0627\u062a \u0645\u0646\u0641\u0635\u0644\u0629. \u0628\u064a\u0646\u0645\u0627 \u064a\u0628\u062f\u0623 \u0645\u0631\u0627\u062c\u0639\u0629 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0645\u0646 \u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627\u060c \u0648\u064a\u062d\u062f\u062f \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u060c \u062b\u0645 \u064a\u062a\u062d\u0642\u0642 \u0645\u0646 \u0633\u0639\u0629 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629 \u0648\u0623\u062f\u0644\u0629 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062f\u0627\u0639\u0645\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0645\u0646 \u0642\u0628\u0644 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645.\n  <\/p>\n<p>\n    \u0644\u0623\u0646 \u0647\u0630\u0647 \u0627\u0644\u0645\u0633\u0627\u0631\u0627\u062a \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u062a\u0628\u062f\u0623 \u0628\u0623\u0633\u0626\u0644\u0629 \u0645\u062e\u062a\u0644\u0641\u0629\u060c \u0641\u0625\u0646 \u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0627\u0644\u0645\u0637\u0627\u0628\u0642 \u0623\u0648 \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u0645\u0627\u062b\u0644 \u0623\u0648 \u0627\u0644\u062a\u0648\u0627\u0641\u0642 \u0627\u0644\u0641\u064a\u0632\u064a\u0627\u0626\u064a \u0644\u064a\u0633 \u0643\u0627\u0641\u064a\u064b\u0627 \u0644\u0625\u0638\u0647\u0627\u0631 \u0623\u0646 \u062c\u0647\u0627\u0632\u064b\u0627 \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062d\u0644 \u0645\u062d\u0644 \u0627\u0644\u0622\u062e\u0631.\n  <\/p>\n<section\n    id=\"pvsv-protected-equipment\"\n    aria-labelledby=\"pvsv-h2-protected-equipment\"\n  ><\/p>\n<h2 id=\"pvsv-h2-protected-equipment\">\u0627\u0628\u062f\u0623 \u0628\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633<\/h2>\n<p>\n      \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0623\u062d\u062c\u0627\u0645 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0623\u0648 \u0627\u0644\u0625\u0639\u062f\u0627\u062f\u0627\u062a \u0623\u0648 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a\u060c \u062d\u062f\u062f \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u062a\u0645 \u062d\u0645\u0627\u064a\u062a\u0647\u0627 \u0648\u062d\u062f\u0648\u062f \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u062d\u0645\u0627\u064a\u062a\u0647\u0627. \u0627\u0633\u0645 \u0627\u0644\u0645\u0639\u062f\u0629 \u0648\u062d\u062f\u0647 \u0644\u064a\u0633 \u0643\u0627\u0641\u064a\u064b\u0627: \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0641\u0639\u0644\u064a \u0648\u0648\u0627\u062c\u0628 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u064a\u062d\u062f\u062f\u0627\u0646 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0627\u0644\u0630\u064a \u064a\u0646\u0637\u0628\u0642.\n    <\/p>\n<h3 id=\"pvsv-h3-tank-protection\">\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0627\u0644\u062c\u0648\u064a\u0629 \u0623\u0648 \u0645\u0646\u062e\u0641\u0636\u0629 \u0627\u0644\u0636\u063a\u0637<\/h3>\n<p>\n      \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u062e\u0632\u0627\u0646 \u062a\u062e\u0632\u064a\u0646 \u062c\u0648\u064a \u0623\u0648 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0636\u063a\u0637\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u062a\u0636\u0645\u0646 \u0645\u0633\u0623\u0644\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0636\u063a\u0637\u064b\u0627 \u0641\u064a <strong>\u0643\u0644\u0627 \u0627\u0644\u0627\u062a\u062c\u0627\u0647\u064a\u0646<\/strong>.\n    <\/p>\n<p>\n      \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062a\u0637\u0644\u0628 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0625\u064a\u062c\u0627\u0628\u064a \u062e\u0631\u0648\u062c \u0627\u0644\u0628\u062e\u0627\u0631 \u0623\u0648 \u0627\u0644\u063a\u0627\u0632 \u0645\u0646 \u0627\u0644\u062e\u0632\u0627\u0646. \u0648\u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062a\u0637\u0644\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u0632\u0627\u0626\u062f \u062f\u062e\u0648\u0644 \u0627\u0644\u063a\u0627\u0632 \u0625\u0644\u0649 \u0627\u0644\u062e\u0632\u0627\u0646 \u0628\u062d\u064a\u062b \u0644\u0627 \u064a\u0646\u062e\u0641\u0636 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0625\u0644\u0649 \u0645\u0627 \u062f\u0648\u0646 \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u0645\u0633\u0645\u0648\u062d \u0628\u0647\u0627 \u0644\u0644\u062e\u0632\u0627\u0646. \u0644\u0630\u0644\u0643 \u064a\u0645\u0643\u0646 \u0644\u0635\u0645\u0627\u0645 PVRV \u0623\u0646 \u064a\u062c\u0645\u0639 \u0628\u064a\u0646 \u0648\u0638\u064a\u0641\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0648\u0638\u064a\u0641\u0629 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062a\u0641\u0631\u064a\u063a.\n    <\/p>\n<p>\n      \u062a\u062a\u0646\u0627\u0648\u0644 \u0623\u0637\u0631 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0645\u062b\u0644 API 2000 \u0648ISO 28300 \u0643\u0644\u0627\u064b \u0645\u0646 \u062d\u0627\u0644\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u063a\u0637\u0627\u0629. \u0648\u0641\u064a \u0646\u0637\u0627\u0642 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629\u060c \u064a\u062c\u0639\u0644 \u0630\u0644\u0643 \u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062e\u0632\u0627\u0646 \u0645\u0633\u0623\u0644\u0629 \u0636\u063a\u0637 \u0648\u062a\u0641\u0631\u064a\u063a \u0648\u0644\u064a\u0633\u062a \u0645\u0633\u0623\u0644\u0629 \u0636\u063a\u0637 \u0625\u064a\u062c\u0627\u0628\u064a \u0641\u0642\u0637.\n    <\/p>\n<p>\n      \u0644\u0630\u0644\u0643 \u0644\u0627 \u064a\u062a\u0645 \u0627\u062e\u062a\u064a\u0627\u0631 \u0635\u0645\u0627\u0645 PVRV \u0641\u0642\u0637 \u0644\u0623\u0646 \u0627\u0644\u062e\u0632\u0627\u0646 \u064a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0641\u0648\u0647\u0629 \u0628\u062d\u062c\u0645 \u0645\u0639\u064a\u0646. \u062a\u0639\u062a\u0645\u062f \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646 \u0648\u0639\u0644\u0649 \u0627\u0644\u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u062e\u0644\u0642 \u0637\u0644\u0628 \u062a\u0646\u0641\u064a\u0633 \u0645\u0646 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u0648\u0645\u0646 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a.\n    <\/p>\n<h3 id=\"pvsv-h3-pressurized-equipment\">\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629<\/h3>\n<p>\n      \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u062c\u0627\u0646\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0641\u064a \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629\u060c \u0627\u0644\u0645\u0634\u0643\u0644\u0629 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629 \u0645\u062e\u062a\u0644\u0641\u0629: <strong>\u062a\u062a\u0637\u0644\u0628 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629 \u0627\u0644\u0645\u0637\u0628\u0642\u0629 \u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u062d\u0627\u0644\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f<\/strong>.\n    <\/p>\n<p>\n      \u062a\u062d\u062f\u062f \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0623\u0648\u0644\u0627\u064b \u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642 \u0627\u0644\u0630\u064a \u064a\u062e\u0644\u0642 \u0637\u0644\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633. \u064a\u062d\u062f\u062f \u0647\u0630\u0627 \u0627\u0644\u0637\u0644\u0628 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u0643\u0648\u0646 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0645\u062d\u062f\u062f \u0642\u0627\u062f\u0631\u064b\u0627 \u0639\u0644\u0649 \u062a\u0644\u0628\u064a\u062a\u0647\u0627.\n    <\/p>\n<p>\n      \u062a\u062a\u0639\u0627\u0645\u0644 \u0642\u0648\u0627\u0639\u062f \u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0641\u064a ASME \u0648\u0625\u0631\u0634\u0627\u062f\u0627\u062a \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0641\u064a API \u0645\u0639 \u0647\u0630\u0627 \u0643\u0645\u0633\u0623\u0644\u0629 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629 \u0627\u0644\u0645\u063a\u0637\u0627\u0629. \u0647\u0630\u0627 \u0623\u0633\u0627\u0633 \u0647\u0646\u062f\u0633\u064a \u0645\u062e\u062a\u0644\u0641 \u0639\u0646 \u062a\u062d\u062f\u064a\u062f \u0643\u064a\u0641\u064a\u0629 \u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0632\u0627\u0646 \u0627\u0644\u062c\u0648\u064a \u0623\u0648 \u0645\u0646\u062e\u0641\u0636 \u0627\u0644\u0636\u063a\u0637 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u0634\u063a\u064a\u0644.\n    <\/p>\n<p>\n      \u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u0639\u062a\u0628\u0627\u0631 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u0645\u062e\u062a\u0627\u0631 \u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0625\u064a\u062c\u0627\u0628\u064a \u062f\u0644\u064a\u0644\u0627\u064b \u0639\u0644\u0649 \u0623\u0646\u0647 \u062a\u0645 \u0623\u064a\u0636\u064b\u0627 \u062a\u0644\u0628\u064a\u0629 \u0645\u062a\u0637\u0644\u0628 \u062a\u0641\u0631\u064a\u063a \u0623\u0648 \u062a\u0646\u0641\u0633 \u062f\u0627\u062e\u0644\u064a \u0645\u0646\u0641\u0635\u0644 \u0644\u0645\u062c\u0631\u062f \u0623\u0646\u0647 \u0645\u062b\u0628\u062a \u0639\u0644\u0649 \u0646\u0641\u0633 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0623\u0648 \u0644\u062f\u064a\u0647 \u0627\u062a\u0635\u0627\u0644 \u0645\u0645\u0627\u062b\u0644.\n    <\/p>\n<p>\n      \u0644\u0630\u0644\u0643 \u0641\u0625\u0646 \u0642\u0631\u0627\u0631 \u0627\u0644\u0634\u0631\u0627\u0621 \u0627\u0644\u0623\u0648\u0644 \u0647\u0648: <strong>\u0647\u0644 \u0627\u0644\u0645\u062a\u0637\u0644\u0628 \u063a\u064a\u0631 \u0627\u0644\u0645\u064f\u062d\u0633\u0645 \u0647\u0648 \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0648\u062a\u0641\u0631\u064a\u063a \u0644\u0644\u062e\u0632\u0627\u0646\u060c \u0623\u0645 \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0632\u0627\u0626\u062f \u0644\u0645\u0639\u062f\u0627\u062a \u0645\u0636\u063a\u0648\u0637\u0629\u061f<\/strong>\n    <\/p>\n<p>\n      \u064a\u062c\u0628 \u062d\u0633\u0645 \u0647\u0630\u0627 \u0627\u0644\u062a\u0635\u0646\u064a\u0641 \u0642\u0628\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0623\u0628\u0639\u0627\u062f \u0627\u0644\u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0623\u0648 \u0639\u0644\u0627\u0645\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0623\u0648 \u0639\u0627\u0626\u0644\u0627\u062a \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a.\n    <\/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\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01.webp\" alt=\"\u0645\u062e\u0637\u0637 \u0642\u0631\u0627\u0631 \u064a\u0641\u0635\u0644 \u0628\u064a\u0646 \u062d\u0645\u0627\u064a\u0629 \u062e\u0632\u0627\u0646 \u0627\u0644\u0636\u063a\u0637-\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0648\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629.\" title=\"Pressure Vacuum Relief Valve vs Safety Valve: Different Duties and Sizing Bases - IMG-01\" width=\"1200\" height=\"900\" class=\"wp-image-56760\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-01-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u064a\u0628\u062f\u0623 \u0645\u0633\u0627\u0631 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u060c \u0648\u0644\u064a\u0633 \u0645\u0646 \u062d\u062c\u0645 \u0627\u0644\u0648\u0635\u0644\u0629 \u0623\u0648 \u0627\u0644\u062a\u0634\u0627\u0628\u0647 \u0627\u0644\u0628\u0635\u0631\u064a.<\/figcaption><\/figure>\n<\/section>\n<section\n    id=\"pvsv-pressure-vacuum-duty\"\n    aria-labelledby=\"pvsv-h2-pressure-vacuum-duty\"\n  ><\/p>\n<h2 id=\"pvsv-h2-pressure-vacuum-duty\">\u0643\u064a\u0641 \u064a\u064f\u0628\u0646\u0649 \u0648\u0627\u062c\u0628 \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0648\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0648\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0627\u0631\u062c\u064a<\/h2>\n<p>\n      \u0644\u0627 \u064a\u0645\u0643\u0646 \u062a\u0645\u062b\u064a\u0644 \u0648\u0627\u062c\u0628 \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0628\u0634\u0643\u0644 \u0643\u0627\u0641\u064d \u0628\u0645\u062a\u0637\u0644\u0628 \u0636\u063a\u0637 \u0645\u0648\u062c\u0628 \u0648\u0627\u062d\u062f. \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0636\u0645\u0646 \u0627\u0644\u0646\u0637\u0627\u0642 \u0647\u0646\u0627\u060c \u064a\u062c\u0628 \u0623\u0646 \u064a\u0645\u064a\u0632 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0628\u064a\u0646 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u0648\u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0648\u062a\u062d\u062f\u064a\u062f \u0637\u0644\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0641\u064a \u0643\u0644 \u0627\u062a\u062c\u0627\u0647.\n    <\/p>\n<h3 id=\"pvsv-h3-outbreathing\">\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637<\/h3>\n<p>\n      <strong>\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0627\u0631\u062c\u064a<\/strong> \u064a\u0639\u0646\u064a \u0623\u0646 \u0627\u0644\u063a\u0627\u0632 \u0623\u0648 \u0627\u0644\u0628\u062e\u0627\u0631 \u064a\u062c\u0628 \u0623\u0646 \u064a\u063a\u0627\u062f\u0631 \u0627\u0644\u062e\u0632\u0627\u0646 \u0639\u0646\u062f\u0645\u0627 \u062a\u0632\u064a\u062f \u0627\u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062f\u0627\u062e\u0644\u064a.\n    <\/p>\n<p>\n      \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062f\u064a \u0645\u0644\u0621 \u0627\u0644\u062e\u0632\u0627\u0646 \u0623\u0648 \u0638\u0631\u0648\u0641 \u062a\u0634\u063a\u064a\u0644 \u0623\u062e\u0631\u0649 \u0625\u0644\u0649 \u0637\u0644\u0628 \u062a\u0646\u0641\u064a\u0633 \u062e\u0627\u0631\u062c\u064a. \u0627\u0644\u0645\u0647\u0645\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0647\u064a \u062a\u062d\u062f\u064a\u062f \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u0648\u0641\u0642\u064b\u0627 \u0644\u0623\u0633\u0627\u0633 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647 \u0648\u0627\u0644\u062a\u0623\u0643\u062f \u0645\u0646 \u0623\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0645\u0642\u062a\u0631\u062d \u064a\u0645\u0643\u0646\u0647 \u062a\u0648\u0641\u064a\u0631 \u062a\u0644\u0643 \u0627\u0644\u0633\u0639\u0629 \u0641\u064a \u0627\u0644\u0638\u0631\u0648\u0641 \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629.\n    <\/p>\n<p>\n      \u0647\u0630\u0647 \u0645\u0633\u0623\u0644\u0629 \u0633\u0639\u0629 \u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u062e\u0632\u0627\u0646. \u0642\u0637\u0631 \u0627\u0644\u0648\u0635\u0644\u0629 \u0648\u062d\u062f\u0647 \u0644\u0627 \u064a\u062e\u0628\u0631\u0646\u0627 \u0628\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0648\u0644\u0627 \u0628\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0644\u0644\u062c\u0647\u0627\u0632.\n    <\/p>\n<h3 id=\"pvsv-h3-inbreathing\">\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a<\/h3>\n<p>\n      <strong>\u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062f\u0627\u062e\u0644\u064a<\/strong> \u0647\u0648 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0639\u0646\u062f\u0645\u0627 \u062a\u0645\u064a\u0644 \u0627\u0644\u0638\u0631\u0648\u0641 \u0625\u0644\u0649 \u062e\u0641\u0636 \u0636\u063a\u0637 \u0627\u0644\u062e\u0632\u0627\u0646 \u0625\u0644\u0649 \u0645\u0627 \u062f\u0648\u0646 \u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u0645\u0642\u0628\u0648\u0644\u0629.\n    <\/p>\n<p>\n      \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u0624\u062f\u064a \u062a\u0641\u0631\u064a\u063a \u0627\u0644\u062e\u0632\u0627\u0646 \u0623\u0648 \u0636\u062e\u0647 \u0625\u0644\u0649 \u062e\u0644\u0642 \u0645\u062a\u0637\u0644\u0628 \u063a\u0627\u0632 \u062f\u0627\u062e\u0644\u064a\u060c \u0648\u0642\u062f \u064a\u0644\u0632\u0645 \u0623\u064a\u0636\u064b\u0627 \u0645\u0631\u0627\u0639\u0627\u0629 \u0627\u0644\u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629 \u0648\u0641\u0642\u064b\u0627 \u0644\u0623\u0633\u0627\u0633 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647.\n    <\/p>\n<p>\n      \u0644\u0630\u0644\u0643 \u0641\u0625\u0646 \u0635\u0645\u0627\u0645 PVRV \u0627\u0644\u0645\u062f\u0645\u062c \u0644\u0647 \u0627\u062a\u062c\u0627\u0647\u0627\u0646 \u0648\u0638\u064a\u0641\u064a\u0627\u0646 \u0645\u062e\u062a\u0644\u0641\u0627\u0646:\n    <\/p>\n<ul>\n<li>\u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u064a\u0633\u0645\u062d \u0628\u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>\u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u064a\u0633\u0645\u062d \u0628\u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0645\u0637\u0644\u0648\u0628\u0629.<\/li>\n<\/ul>\n<p>\n      \u0643\u0641\u0627\u064a\u0629 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637 \u0648\u062d\u062f\u0647 \u0644\u0627 \u062a\u0639\u0646\u064a \u0634\u064a\u0626\u064b\u0627 \u0639\u0646 \u0643\u0641\u0627\u064a\u0629 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a. \u0648\u0628\u0627\u0644\u0645\u062b\u0644\u060c \u0641\u0625\u0646 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u062e\u062a\u0627\u0631 \u0641\u0642\u0637 \u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0644\u0627 \u064a\u0648\u0641\u0631 \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0648\u0638\u064a\u0641\u0629 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629.\n    <\/p>\n<h3 id=\"pvsv-h3-dual-direction\">\u0644\u0645\u0627\u0630\u0627 \u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u062e\u062a\u0632\u0627\u0644 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u062b\u0646\u0627\u0626\u064a\u0629 \u0627\u0644\u0627\u062a\u062c\u0627\u0647 \u0625\u0644\u0649 \u0631\u0642\u0645 \u0636\u063a\u0637 \u0648\u0627\u062d\u062f<\/h3>\n<p>\n      \u0645\u0646 \u0623\u062e\u0637\u0627\u0621 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0627\u062e\u062a\u0632\u0627\u0644 \u0635\u0645\u0627\u0645 PVRV \u0627\u0644\u0645\u0648\u062c\u0648\u062f \u0625\u0644\u0649 \u062d\u062c\u0645 \u062a\u0648\u0635\u064a\u0644\u0647 \u0648\u0636\u0628\u0637 \u0636\u063a\u0637 \u0648\u0627\u062d\u062f. \u064a\u0645\u0643\u0646 \u0623\u0646 \u064a\u062d\u0630\u0641 \u0630\u0644\u0643 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0628\u0623\u0643\u0645\u0644\u0647 \u0645\u0646 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u062d\u0645\u0627\u064a\u0629.\n    <\/p>\n<p>\n      \u0642\u062f \u062a\u062d\u062a\u0627\u062c \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0633\u0644\u064a\u0645\u0629 \u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u062e\u0632\u0627\u0646 \u0625\u0644\u0649 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0645\u0646\u0641\u0635\u0644\u0629 \u0644\u0643\u0644 \u0645\u0646:\n    <\/p>\n<ul>\n<li>\u0636\u063a\u0637 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646\u061b;<\/li>\n<li>\u062a\u0641\u0631\u064a\u063a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646\u061b;<\/li>\n<li>\u0636\u0628\u0637 \u062c\u0627\u0646\u0628 \u0627\u0644\u0636\u063a\u0637\u061b;<\/li>\n<li>\u0636\u0628\u0637 \u062c\u0627\u0646\u0628 \u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0627\u0631\u062c\u064a \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u062f\u0627\u062e\u0644\u064a \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>\u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u062a\u064a \u062a\u064f\u0646\u0634\u0626 \u062a\u0644\u0643 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a.<\/li>\n<\/ul>\n<p>\n      \u062a\u0639\u062a\u0645\u062f \u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0627\u0644\u062f\u0642\u064a\u0642\u0629 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646 \u0648\u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0633\u0627\u0626\u062f\u060c \u0644\u0643\u0646 \u0642\u0627\u0639\u062f\u0629 \u0627\u0644\u0642\u0631\u0627\u0631 \u062b\u0627\u0628\u062a\u0629: <strong>\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0639\u0644\u0649 \u0645\u0647\u0645\u0629 \u062d\u0645\u0627\u064a\u0629 \u062b\u0646\u0627\u0626\u064a\u0629 \u0627\u0644\u0627\u062a\u062c\u0627\u0647 \u0645\u0646 \u0645\u0648\u0627\u0635\u0641\u0629 \u0623\u062d\u0627\u062f\u064a\u0629 \u0627\u0644\u0627\u062a\u062c\u0627\u0647.<\/strong>\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\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02.webp\" alt=\"Tank showing outward pressure-side flow and inward vacuum-side flow for separate venting duties.\" title=\"Pressure Vacuum Relief Valve vs Safety Valve: Different Duties and Sizing Bases - IMG-02\" width=\"1200\" height=\"900\" class=\"wp-image-56761\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-02-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u062a\u062d\u062a\u0648\u064a \u062d\u0645\u0627\u064a\u0629 \u0636\u063a\u0637-\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u062e\u0632\u0627\u0646 \u0639\u0644\u0649 \u0645\u0647\u0627\u0645 \u0645\u0646\u0641\u0635\u0644\u0629 \u0644\u0644\u062e\u0627\u0631\u062c \u0648\u0627\u0644\u062f\u0627\u062e\u0644 \u064a\u062c\u0628 \u062a\u0642\u064a\u064a\u0645\u0647\u0627 \u0628\u0634\u0643\u0644 \u0645\u0633\u062a\u0642\u0644.<\/figcaption><\/figure>\n<\/section>\n<section\n    id=\"pvsv-normal-emergency-blanketing\"\n    aria-labelledby=\"pvsv-h2-normal-emergency-blanketing\"\n  ><\/p>\n<h2 id=\"pvsv-h2-normal-emergency-blanketing\">\u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a\u060c \u0648\u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626\u060c \u0648\u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0647\u064a \u0641\u062d\u0648\u0635\u0627\u062a \u0645\u0646\u0641\u0635\u0644\u0629 \u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u062e\u0632\u0627\u0646<\/h2>\n<p>\n      \u0644\u0627 \u064a\u0644\u063a\u064a \u0635\u0645\u0627\u0645 PVRV \u0627\u0644\u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u062a\u062d\u062f\u064a\u062f \u0627\u0644\u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u062a\u0642\u064a\u064a\u0645 \u0646\u0638\u0627\u0645 \u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062e\u0632\u0627\u0646 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633\u0647\u0627. \u0639\u0644\u0649 \u0648\u062c\u0647 \u0627\u0644\u062e\u0635\u0648\u0635\u060c, <strong>\u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a \u0648\u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0645\u062a\u0637\u0644\u0628\u0627\u0646 \u0645\u0646\u0641\u0635\u0644\u0627\u0646<\/strong>.\n    <\/p>\n<h3 id=\"pvsv-h3-normal-vs-emergency\">\u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a \u0645\u0642\u0627\u0628\u0644 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626<\/h3>\n<p>\n      \u064a\u0639\u0627\u0644\u062c \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a \u062a\u063a\u064a\u0631\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u0645\u0631\u062a\u0628\u0637\u0629 \u0628\u0627\u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a\u0629 \u0648\u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629 \u0627\u0644\u062a\u064a \u064a\u063a\u0637\u064a\u0647\u0627 \u0623\u0633\u0627\u0633 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647.\n    <\/p>\n<p>\n      \u064a\u0639\u0627\u0644\u062c \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0645\u062a\u0637\u0644\u0628\u064b\u0627 \u0637\u0627\u0631\u0626\u064b\u0627 \u0645\u0646\u0641\u0635\u0644\u064b\u0627.\n    <\/p>\n<p>\n      \u062a\u0645\u064a\u0632 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u062a\u0627\u0646 API 2000 \u0648ISO 28300 \u0628\u064a\u0646 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a \u0648\u0627\u0644\u0637\u0627\u0631\u0626 \u0636\u0645\u0646 \u0646\u0637\u0627\u0642 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646. \u0627\u0644\u0646\u062a\u064a\u062c\u0629 \u0627\u0644\u0634\u0631\u0627\u0626\u064a\u0629 \u0645\u0628\u0627\u0634\u0631\u0629: \u062a\u0648\u0641\u0631 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633 \u0643\u0627\u0641\u064a\u0629 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628\u064a \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0641\u064a \u0627\u0644\u0648\u0636\u0639 \u0627\u0644\u0639\u0627\u062f\u064a \u0644\u064a\u0633 \u062f\u0644\u064a\u0644\u064b\u0627 \u0639\u0644\u0649 \u0627\u0633\u062a\u064a\u0641\u0627\u0621 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0623\u064a\u0636\u064b\u0627.\n    <\/p>\n<p>\n      \u0639\u0644\u0649 \u0627\u0644\u0639\u0643\u0633 \u0645\u0646 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u062a\u062d\u062f\u064a\u062f \u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0648\u0627\u0631\u0626 \u0644\u0627 \u064a\u0644\u063a\u064a \u0627\u0644\u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u062a\u062d\u062f\u064a\u062f \u0648\u0627\u062c\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u0639\u0627\u062f\u064a\u0629 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628\u064a \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u062a\u064a \u062a\u0646\u0637\u0628\u0642 \u0623\u062b\u0646\u0627\u0621 \u0627\u0644\u062a\u0634\u063a\u064a\u0644.\n    <\/p>\n<p>\n      \u0647\u0630\u0627 \u0627\u0644\u062a\u0645\u064a\u064a\u0632 \u0644\u0627 <strong>\u064a\u062d\u062f\u062f<\/strong> \u0631\u0642\u0645\u064b\u0627 \u0648\u0627\u062d\u062f\u064b\u0627 \u0623\u0648 \u062a\u0631\u062a\u064a\u0628\u064b\u0627 \u0648\u0627\u062d\u062f\u064b\u0627 \u0644\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0645\u0627\u062f\u064a\u0629. \u064a\u0639\u062a\u0645\u062f \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0639\u0644\u0649 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u060c \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0634\u0631\u0648\u0639\u060c \u0648\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062e\u062a\u0627\u0631\u0629.\n    <\/p>\n<p>\n      \u0644\u0630\u0627 \u0641\u0625\u0646 \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0627\u0644\u0635\u062d\u064a\u062d \u0644\u064a\u0633 \u0628\u0628\u0633\u0627\u0637\u0629 \u0645\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0645\u0648\u062c\u0648\u062f\u064b\u0627 \u0623\u0645 \u0644\u0627. \u0628\u0644 \u0647\u0648: \u0645\u0627 \u0647\u064a \u0648\u0627\u062c\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0639\u0627\u062f\u064a\u0629 \u0648\u0627\u0644\u0637\u0627\u0631\u0626\u0629 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u0641\u064a \u0628\u0647\u0627 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0643\u0627\u0645\u0644\u060c \u0648\u0623\u064a \u062c\u0647\u0627\u0632 \u0623\u0648 \u0645\u062c\u0645\u0648\u0639\u0629 \u0623\u062c\u0647\u0632\u0629 \u0645\u0633\u0624\u0648\u0644\u0629 \u0639\u0646 \u0643\u0644 \u0648\u0627\u062c\u0628.\n    <\/p>\n<p>\n      \u064a\u0638\u0644 \u062d\u0633\u0627\u0628 \u062d\u062c\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a \u062e\u0627\u0631\u062c \u0646\u0637\u0627\u0642 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629.\n    <\/p>\n<h3 id=\"pvsv-h3-blanketing\">\u0623\u064a\u0646 \u064a\u062f\u062e\u0644 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0641\u064a \u0645\u0631\u0627\u062c\u0639\u0629 \u062c\u0627\u0646\u0628 \u0627\u0644\u062e\u0632\u0627\u0646<\/h3>\n<p>\n      \u0642\u062f \u064a\u0639\u0645\u0644 \u0627\u0644\u062e\u0632\u0627\u0646 \u0623\u064a\u0636\u064b\u0627 \u0645\u0639 \u0646\u0638\u0627\u0645 \u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644. \u0639\u0646\u062f\u0645\u0627 \u064a\u0643\u0648\u0646 \u0645\u0648\u062c\u0648\u062f\u064b\u0627\u060c \u064a\u0635\u0628\u062d \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u062c\u0632\u0621\u064b\u0627 \u0645\u0646 \u0645\u0631\u0627\u062c\u0639\u0629 \u062a\u0648\u0627\u0632\u0646 \u0627\u0644\u063a\u0627\u0632 \u0648\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0644\u0644\u062e\u0632\u0627\u0646.\n    <\/p>\n<p>\n      \u062a\u062a\u0639\u0627\u0645\u0644 \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u064a\u0629 \u0627\u0644\u0645\u062c\u0645\u062f\u0629 \u0644\u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0645\u0639 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u062c\u0646\u0628\u064b\u0627 \u0625\u0644\u0649 \u062c\u0646\u0628 \u0645\u0639 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0645\u0644\u0621 \u0627\u0644\u062e\u0632\u0627\u0646 \u0648\u062a\u0641\u0631\u064a\u063a\u0647 \u0648\u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0648\u0627\u0644\u062a\u0646\u0641\u0633. \u0648\u0647\u0630\u0627 \u064a\u062f\u0639\u0645 \u0627\u0639\u062a\u0628\u0627\u0631 \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0645\u062f\u062e\u0644\u064b\u0627 \u0647\u0646\u062f\u0633\u064a\u064b\u0627 \u0630\u0627 \u0635\u0644\u0629 \u0628\u062c\u0627\u0646\u0628 \u0627\u0644\u062e\u0632\u0627\u0646 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0639\u062a\u0628\u0627\u0631\u0647 \u0645\u0644\u062d\u0642\u064b\u0627 \u063a\u064a\u0631 \u0630\u064a \u0635\u0644\u0629.\n    <\/p>\n<p>\n      \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u0645\u0646\u0638\u0645 \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0648\u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u064a\u0624\u062f\u064a\u0627\u0646 \u0648\u0638\u0627\u0626\u0641 \u0645\u062e\u062a\u0644\u0641\u0629.\n    <\/p>\n<p>\n      \u0644\u0627 \u064a\u0645\u0643\u0646 \u0644\u0623\u064a \u0645\u0646 \u0627\u0644\u0648\u0638\u064a\u0641\u062a\u064a\u0646 \u0623\u0646 \u062a\u062d\u0644 \u0645\u062d\u0644 \u0627\u0644\u0623\u062e\u0631\u0649: \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0644\u0627 \u062a\u0644\u063a\u064a \u0627\u0644\u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a\u060c \u0628\u064a\u0646\u0645\u0627 \u0648\u062c\u0648\u062f \u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0644\u0627 \u064a\u062b\u0628\u062a \u0623\u0646\u0647 \u062a\u0645\u062a \u0645\u0639\u0627\u0644\u062c\u0629 \u062c\u0645\u064a\u0639 \u0627\u0644\u062d\u0627\u0644\u0627\u062a \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0623\u0648 \u0627\u0644\u0637\u0648\u0627\u0631\u0626.\n    <\/p>\n<p>\n      \u0644\u0623\u063a\u0631\u0627\u0636 \u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a\u060c \u0627\u0644\u0642\u0627\u0639\u062f\u0629 \u0627\u0644\u0645\u0641\u064a\u062f\u0629 \u0647\u064a: <strong>\u0625\u0630\u0627 \u0643\u0627\u0646 \u0647\u0646\u0627\u0643 \u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644\u060c \u0641\u064a\u062c\u0628 \u0627\u0644\u0625\u0641\u0635\u0627\u062d \u0639\u0646\u0647\u0627 \u0643\u062c\u0632\u0621 \u0645\u0646 \u0627\u0644\u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0644\u062c\u0647\u0629 \u0627\u0644\u062e\u0632\u0627\u0646 \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0645\u0631\u0627\u062c\u0639\u0629 \u0635\u0645\u0627\u0645 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0628\u0645\u0639\u0632\u0644 \u0639\u0646 \u0630\u0644\u0643.<\/strong>\n    <\/p>\n<p>\n      \u064a\u0646\u062a\u0645\u064a \u062a\u0635\u0645\u064a\u0645 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a \u0625\u0644\u0649 \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u062e\u0632\u0627\u0646\u060c \u0648\u0644\u064a\u0633 \u0625\u0644\u0649 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629.\n    <\/p>\n<\/section>\n<section\n    id=\"pvsv-safety-valve-sizing-basis\"\n    aria-labelledby=\"pvsv-h2-safety-valve-sizing-basis\"\n  ><\/p>\n<h2 id=\"pvsv-h2-safety-valve-sizing-basis\">\u0643\u064a\u0641 \u064a\u0628\u062f\u0623 \u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0645\u0646 \u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u062d\u0627\u0643\u0645<\/h2>\n<p>\n      \u064a\u062a\u0628\u0639 \u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0645\u0646\u0637\u0642\u064b\u0627 \u0645\u062e\u062a\u0644\u0641\u064b\u0627 \u0644\u0623\u0646 \u0627\u0644\u0633\u0624\u0627\u0644 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0644\u064a\u0633 \u0643\u064a\u0641 \u064a\u062c\u0628 \u0623\u0646 \u064a\u062a\u0646\u0641\u0633 \u0627\u0644\u062e\u0632\u0627\u0646\u060c \u0628\u0644 \u0647\u0648: \u0645\u0627 \u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u0623\u0646 \u064a\u064f\u0646\u0641\u064e\u0651\u0633 \u0636\u062f\u0651\u0647 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u0629.\n    <\/p>\n<p>\n      \u062a\u0636\u0639 \u0625\u0631\u0634\u0627\u062f\u0627\u062a API \u0644\u062a\u062e\u0641\u064a\u0641 \u0627\u0644\u0636\u063a\u0637 \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a ASME \u0644\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0645\u0634\u0643\u0644\u0629 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0641\u064a \u0625\u0637\u0627\u0631 \u062c\u0647\u0627\u0632 \u062a\u0646\u0641\u064a\u0633 \u0645\u0646\u0641\u0635\u0644 \u0639\u0646 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0627\u0644\u062c\u0648\u064a\u0629 \u0623\u0648 \u0645\u0646\u062e\u0641\u0636\u0629 \u0627\u0644\u0636\u063a\u0637.\n    <\/p>\n<h3 id=\"pvsv-h3-governing-case\">\u062d\u062f\u062f \u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0627\u0643\u0645 \u0642\u0628\u0644 \u0645\u0642\u0627\u0633 \u0627\u0644\u0635\u0645\u0627\u0645<\/h3>\n<p>\n      \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u062a\u062d\u062f\u064a\u062f \u0645\u0642\u0627\u0633 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0628\u0627\u0644\u0628\u062f\u0621 \u0628\u0642\u0637\u0631 \u062a\u0648\u0635\u064a\u0644\u0629 \u0645\u0631\u063a\u0648\u0628.\n    <\/p>\n<p>\n      \u064a\u062c\u0628 \u0623\u0648\u0644\u0627\u064b \u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a \u0644\u062a\u062d\u062f\u064a\u062f \u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642\u0629. \u0627\u0644\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0630\u064a \u064a\u062d\u062f\u062f \u0637\u0644\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u062a\u062d\u0643\u0645 \u064a\u0648\u0641\u0631 \u0627\u0644\u0623\u0633\u0627\u0633 \u0644\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629.\n    <\/p>\n<p>\n      \u0647\u0630\u0627 \u0627\u0644\u062a\u0633\u0644\u0633\u0644 \u0645\u0647\u0645 \u0644\u0623\u0646 \u0627\u0644\u0635\u0645\u0627\u0645 \u0642\u062f \u064a\u0646\u0627\u0633\u0628 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0629 \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0641\u064a\u0632\u064a\u0627\u0626\u064a\u064b\u0627 \u062f\u0648\u0646 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0644\u062f\u064a\u0647 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u062d\u0627\u0644\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0628\u0642\u0629.\n    <\/p>\n<p>\n      \u0627\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0647\u0646\u062f\u0633\u064a \u0645\u0646 \u0627\u0644\u0646\u0627\u062d\u064a\u0629 \u0627\u0644\u0645\u0641\u0627\u0647\u064a\u0645\u064a\u0629 \u0647\u0648: <strong>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u2190 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u2190 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0633\u0639\u0629 \u0627\u0644\u062c\u0647\u0627\u0632<\/strong>.\n    <\/p>\n<p>\n      \u062a\u062a\u0648\u0642\u0641 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629 \u0639\u0645\u062f\u064b\u0627 \u0639\u0646\u062f \u0647\u0630\u0627 \u0627\u0644\u062d\u062f \u0627\u0644\u0641\u0627\u0635\u0644 \u0644\u0644\u0642\u0631\u0627\u0631. \u062d\u0633\u0627\u0628 \u062d\u0645\u0644 \u0627\u0644\u062a\u0646\u0641\u064a\u0633\u060c \u0648\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0641\u062a\u062d\u0629\u060c \u0648\u062a\u0637\u0628\u064a\u0642 \u0637\u0631\u0642 \u0627\u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u062a\u0641\u0635\u064a\u0644\u064a\u0629 \u062a\u0646\u062a\u0645\u064a \u0625\u0644\u0649 \u0639\u0645\u0644\u064a\u0629 \u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0627\u0644\u0645\u062e\u0635\u0635\u0629.\n    <\/p>\n<h3 id=\"pvsv-h3-capacity-vs-connection\">\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u064a\u0633\u062a \u0646\u0641\u0633 \u062d\u062c\u0645 \u0627\u0644\u0648\u0635\u0644\u0629<\/h3>\n<p>\n      \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0647\u064a <strong>\u0645\u062a\u0637\u0644\u0628 \u0645\u0646 \u062c\u0627\u0646\u0628 \u0627\u0644\u0646\u0638\u0627\u0645<\/strong>. \u062d\u062c\u0645 \u0627\u0644\u0648\u0635\u0644\u0629 \u0647\u0648 \u0648\u0627\u062c\u0647\u0629 \u0641\u064a\u0632\u064a\u0627\u0626\u064a\u0629.\n    <\/p>\n<p>\n      \u0644\u0630\u0644\u0643 \u0641\u0647\u0645\u0627 \u0644\u064a\u0633\u0627 \u0643\u0645\u064a\u062a\u064a\u0646 \u0647\u0646\u062f\u0633\u064a\u062a\u064a\u0646 \u0642\u0627\u0628\u0644\u062a\u064a\u0646 \u0644\u0644\u062a\u0628\u0627\u062f\u0644.\n    <\/p>\n<p>\n      \u062a\u0624\u062b\u0631 \u0648\u0635\u0644\u0627\u062a \u0627\u0644\u0645\u062f\u062e\u0644 \u0648\u0627\u0644\u0645\u062e\u0631\u062c \u0639\u0644\u0649 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0648\u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062b\u0631 \u0639\u0644\u0649 \u0627\u0644\u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u0646\u0647\u0627\u0626\u064a \u0644\u0644\u0635\u0645\u0627\u0645\u060c \u0644\u0643\u0646 \u062d\u062c\u0645 \u0627\u0644\u0648\u0635\u0644\u0629 \u0648\u062d\u062f\u0647 \u0644\u064a\u0633 \u062f\u0644\u064a\u0644\u0627\u064b \u0639\u0644\u0649 \u0623\u0646 \u0635\u0645\u0627\u0645 \u0623\u0645\u0627\u0646 \u0645\u0639\u064a\u0646 \u064a\u0645\u0643\u0646\u0647 \u062a\u0644\u0628\u064a\u0629 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u062a\u0646\u0641\u064a\u0633.\n    <\/p>\n<p>\n      \u064a\u062c\u0628 \u0623\u0646 \u064a\u062d\u0627\u0641\u0638 \u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0639\u0644\u0649 \u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u0641\u0639\u0644\u064a \u0623\u0648 \u0625\u0646\u0634\u0627\u0621 \u0623\u0633\u0627\u0633 \u062c\u062f\u064a\u062f \u0635\u0627\u0644\u062d \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0627\u0644\u062d\u062c\u0645 \u0627\u0644\u0627\u0633\u0645\u064a \u0643\u062f\u0644\u064a\u0644 \u0639\u0644\u0649 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633.\n    <\/p>\n<h3 id=\"pvsv-h3-capacity-evidence\">\u0634\u0647\u0627\u062f\u0629 \u0627\u0644\u0633\u0639\u0629 \u0623\u0648 \u0627\u0644\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u062f\u0627\u0639\u0645\u0629 \u0639\u0646\u062f \u0627\u0644\u0627\u0642\u062a\u0636\u0627\u0621<\/h3>\n<p>\n      \u064a\u062a\u0637\u0644\u0628 \u062c\u0627\u0646\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0623\u064a\u0636\u064b\u0627 \u062a\u0645\u064a\u064a\u0632\u064b\u0627 \u0628\u064a\u0646 <strong>\u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062a\u064a \u064a\u062a\u0637\u0644\u0628\u0647\u0627 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u062d\u0645\u064a<\/strong> \u0648 <strong>\u0623\u062f\u0644\u0629 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0644\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u062e\u062a\u0627\u0631<\/strong>.\n    <\/p>\n<p>\n      \u0639\u0646\u062f\u0645\u0627 \u062a\u0643\u0648\u0646 \u0634\u0647\u0627\u062f\u0629 \u0627\u0644\u0633\u0639\u0629 \u0645\u0637\u0644\u0648\u0628\u0629 \u0628\u0645\u0648\u062c\u0628 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0648\u0641\u0631 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0623\u0648 \u0627\u0644\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u062f\u0627\u0639\u0645\u0629 \u0627\u0644\u0645\u0642\u0627\u0628\u0644\u0629 \u062f\u0644\u064a\u0644\u0627\u064b \u0645\u0646 \u062c\u0627\u0646\u0628 \u0627\u0644\u062c\u0647\u0627\u0632. \u0639\u0646\u062f\u0645\u0627 \u064a\u0646\u0637\u0628\u0642 \u0623\u0633\u0627\u0633 \u062a\u0648\u062b\u064a\u0642 \u0645\u062e\u062a\u0644\u0641\u060c \u064a\u062c\u0628 \u0639\u0644\u0649 \u0627\u0644\u0645\u0634\u0631\u0648\u0639 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0623\u062f\u0644\u0629 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u062a\u0644\u0643 \u0627\u0644\u062d\u0627\u0644\u0629.\n    <\/p>\n<p>\n      \u0644\u0630\u0644\u0643 \u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0639\u0644\u0649 \u0623\u0646\u0647\u0627 \u0639\u0627\u0644\u0645\u064a\u0629.\n    <\/p>\n<p>\n      \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0648\u0635\u0641 \u0642\u064a\u0645\u0629 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0639\u0627\u0645\u0629 \u0641\u064a \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0628\u0623\u0646\u0647\u0627 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u0639\u062a\u0645\u062f\u0629\u060c \u0648\u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0628\u0628\u0633\u0627\u0637\u0629 \u0625\u0639\u0627\u062f\u0629 \u062a\u0633\u0645\u064a\u0629 \u062a\u0635\u0646\u064a\u0641 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633 \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0639\u0644\u0649 \u0623\u0646\u0647 \u0633\u0639\u0629 \u062a\u0646\u0641\u064a\u0633 \u0645\u0639\u062a\u0645\u062f\u0629 \u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0645\u0627 \u0644\u0645 \u064a\u0643\u0646 \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645 \u064a\u062f\u0639\u0645 \u0647\u0630\u0627 \u0627\u0644\u0645\u0635\u0637\u0644\u062d \u0641\u0639\u0644\u064a\u064b\u0627.\n    <\/p>\n<p>\n      \u0648\u0628\u0627\u0644\u062a\u0627\u0644\u064a\u060c \u0641\u0625\u0646 \u0642\u0631\u0627\u0631 \u0627\u0644\u0634\u0631\u0627\u0621 \u064a\u062a\u0643\u0648\u0646 \u0645\u0646 \u062c\u0632\u0623\u064a\u0646: \u0623\u0648\u0644\u0627\u064b \u062a\u062d\u062f\u064a\u062f \u0633\u0639\u0629 \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b \u062b\u0645 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0623\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0645\u0642\u062a\u0631\u062d \u0644\u062f\u064a\u0647 \u0623\u062f\u0644\u0629 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062f\u0627\u0639\u0645\u0629 \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629.\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\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03.webp\" alt=\"Two engineering routes comparing tank pressure-vacuum venting with overpressure-case and capacity-verification logic.\" title=\"Pressure Vacuum Relief Valve vs Safety Valve: Different Duties and Sizing Bases - IMG-03\" width=\"1200\" height=\"900\" class=\"wp-image-56762\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-03-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>\u0642\u062f \u064a\u062a\u0636\u0645\u0646 \u0643\u0644\u0627 \u0627\u0644\u0645\u0633\u0627\u0631\u064a\u0646 \u0641\u062d\u0648\u0635\u0627\u062a \u0644\u0644\u0633\u0639\u0629\u060c \u0644\u0643\u0646\u0647\u0645\u0627 \u064a\u0628\u062f\u0622\u0646 \u0645\u0646 \u0645\u0634\u0643\u0644\u062a\u064a\u0646 \u0647\u0646\u062f\u0633\u064a\u062a\u064a\u0646 \u0645\u062e\u062a\u0644\u0641\u062a\u064a\u0646 \u0648\u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u0628\u062f\u0627\u0644\u0647\u0645\u0627 \u0628\u0628\u0639\u0636\u0647\u0645\u0627 \u0627\u0644\u0628\u0639\u0636.<\/figcaption><\/figure>\n<\/section>\n<section\n    id=\"pvsv-non-interchangeable\"\n    aria-labelledby=\"pvsv-h2-non-interchangeable\"\n  ><\/p>\n<h2 id=\"pvsv-h2-non-interchangeable\">\u0644\u0645\u0627\u0630\u0627 \u0644\u0627 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0623\u0633\u0627\u0633\u064a\u0627\u062a \u062d\u0633\u0627\u0628 \u0645\u0642\u0627\u0633\u0627\u062a \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0648\u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646<\/h2>\n<p>\n      \u0623\u0642\u0648\u0649 \u0633\u0628\u0628 \u0644\u0639\u062f\u0645 \u0627\u0633\u062a\u0628\u062f\u0627\u0644 \u0647\u0630\u0647 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0645\u0646 \u062e\u0644\u0627\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c\u0627\u062a \u0647\u0648 \u0623\u0646\u0647\u0627 \u062a\u062c\u064a\u0628 \u0639\u0644\u0649 <strong>\u0623\u0633\u0626\u0644\u0629 \u0647\u0646\u062f\u0633\u064a\u0629 \u0645\u062e\u062a\u0644\u0641\u0629<\/strong>.\n    <\/p>\n<p>\n      \u062a\u0628\u062f\u0623 \u0645\u0631\u0627\u062c\u0639\u0629 \u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a (PVRV) \u0628\u062d\u062f\u0648\u062f \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a \u0644\u0644\u062e\u0632\u0627\u0646 \u0648\u0627\u0644\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u064a \u062a\u062e\u0644\u0642 \u0637\u0644\u0628\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0644\u0644\u062e\u0627\u0631\u062c \u0648\u0627\u0644\u062f\u0627\u062e\u0644. \u0628\u064a\u0646\u0645\u0627 \u062a\u0628\u062f\u0623 \u0645\u0631\u0627\u062c\u0639\u0629 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \u0628\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642 \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629.\n    <\/p>\n<p>\n      \u0642\u062f \u064a\u0646\u062a\u0647\u064a \u0643\u0644\u0627 \u0627\u0644\u0645\u0633\u0627\u0631\u064a\u0646 \u0628\u0635\u0645\u0627\u0645 \u0648\u0641\u062d\u0635 \u0644\u0644\u0633\u0639\u0629\u060c \u0644\u0643\u0646 \u0623\u0633\u0627\u0633\u064a\u0627\u062a \u0627\u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u0623\u0648\u0644\u064a\u0629 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0647\u0645\u0627 \u0645\u062e\u062a\u0644\u0641\u0629.\n    <\/p>\n<h3 id=\"pvsv-h3-different-inputs\">\u0645\u062f\u062e\u0644\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u062a\u0646\u062a\u062c \u0641\u062d\u0648\u0635\u0627\u062a \u0633\u0639\u0629 \u0645\u062e\u062a\u0644\u0641\u0629<\/h3>\n<div\n      class=\"pvsv-table-wrap\"\n      tabindex=\"0\"\n      role=\"region\"\n      aria-label=\"Scrollable comparison of PVRV and safety-valve sizing bases\"\n    ><\/p>\n<table>\n<caption>\u0645\u0633\u0627\u0631 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646 PVRV \u0645\u0642\u0627\u0628\u0644 \u0645\u0633\u0627\u0631 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646<\/caption>\n<thead>\n<tr>\n<th scope=\"col\">\u0645\u062c\u0627\u0644 \u0627\u0644\u0642\u0631\u0627\u0631<\/th>\n<th scope=\"col\">\u0645\u0633\u0627\u0631 PVRV \/ \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062e\u0632\u0627\u0646<\/th>\n<th scope=\"col\">\u0645\u0633\u0627\u0631 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646 \/ \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629<\/th>\n<td>\u062e\u0632\u0627\u0646 \u0639\u0646\u062f \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062c\u0648\u064a \u0623\u0648 \u0636\u063a\u0637 \u0645\u0646\u062e\u0641\u0636 \u0636\u0645\u0646 \u0646\u0637\u0627\u0642 \u0647\u0630\u0647 \u0627\u0644\u0645\u0642\u0627\u0644\u0629<\/td>\n<td>\u0645\u0639\u062f\u0627\u062a \u0645\u0636\u063a\u0648\u0637\u0629 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0637\u0628\u064a\u0642<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">\u0627\u0644\u0648\u0627\u062c\u0628 \u0627\u0644\u0623\u0633\u0627\u0633\u064a<\/th>\n<td>\u062a\u0646\u0641\u064a\u0633 \u0644\u0644\u062e\u0627\u0631\u062c \u0645\u0646 \u062c\u0647\u0629 \u0627\u0644\u0636\u063a\u0637 \u0648\u062a\u0646\u0641\u064a\u0633 \u0644\u0644\u062f\u0627\u062e\u0644 \u0645\u0646 \u062c\u0647\u0629 \u0627\u0644\u062a\u0641\u0631\u064a\u063a<\/td>\n<td>\u062d\u0645\u0627\u064a\u0629 \u0636\u062f \u062d\u0627\u0644\u0629 \u062a\u0646\u0641\u064a\u0633 \u0636\u063a\u0637 \u0632\u0627\u0626\u062f \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0637\u0628\u064a\u0642<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0633\u0627\u0628<\/th>\n<td>\u062d\u062f\u0648\u062f \u0636\u063a\u0637-\u062a\u0641\u0631\u064a\u063a \u0627\u0644\u062e\u0632\u0627\u0646 \u0648\u0627\u0644\u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u062e\u0644\u0642 \u0637\u0644\u0628\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0644\u0644\u062e\u0627\u0631\u062c \u0648\u0627\u0644\u062f\u0627\u062e\u0644<\/td>\n<td>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0642\u0627\u0628\u0644 \u0644\u0644\u062a\u0637\u0628\u064a\u0642 \u0648\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">\u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0633\u0639\u0629<\/th>\n<td>\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0645\u0646 \u062c\u0647\u0629 \u0627\u0644\u0636\u063a\u0637 \u0648\u0645\u0646 \u062c\u0647\u0629 \u0627\u0644\u062a\u0641\u0631\u064a\u063a\u060c \u0645\u0639 \u0641\u062d\u0635 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644 \u0639\u0646\u062f \u0627\u0644\u0627\u0642\u062a\u0636\u0627\u0621<\/td>\n<td>\u0645\u0642\u0627\u0631\u0646\u0629 \u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0645\u0639 \u062f\u0644\u064a\u0644 \u0633\u0639\u0629 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0645\u0646\u0627\u0633\u0628 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>\n      \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0627\u0644\u062e\u0632\u0627\u0646\/\u0635\u0645\u0627\u0645 \u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0634\u0645\u0644 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629:\n    <\/p>\n<ul>\n<li>\u0636\u063a\u0637 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>\u0625\u0639\u062f\u0627\u062f\u0627\u062a \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>\u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0639\u0628\u0626\u0629 \u0648\u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u0633 \u0627\u0644\u0637\u0628\u064a\u0639\u064a \u0644\u0644\u062e\u0627\u0631\u062c \u0648\u0627\u0644\u062f\u0627\u062e\u0644\u061b;<\/li>\n<li>\u0627\u0639\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u062d\u0631\u0627\u0631\u064a \u0639\u0646\u062f \u0627\u0644\u0627\u0642\u062a\u0636\u0627\u0621\u061b;<\/li>\n<li>\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u062a\u063a\u0637\u064a\u0629 \u0628\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u062e\u0627\u0645\u0644 \u0639\u0646\u062f \u0648\u062c\u0648\u062f\u0647\u0627\u061b;<\/li>\n<li>\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0637\u0627\u0631\u0626 \u0627\u0644\u0645\u0646\u0641\u0635\u0644\u0629.<\/li>\n<\/ul>\n<p>\n      \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 \u0635\u0645\u0627\u0645 \u0627\u0644\u0623\u0645\u0627\u0646\u060c \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0634\u0645\u0644 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629:\n    <\/p>\n<ul>\n<li>\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0636\u063a\u0648\u0637\u0629 \u0627\u0644\u0645\u062d\u0645\u064a\u0629\u061b;<\/li>\n<li>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642\u061b;<\/li>\n<li>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0636\u0628\u0637 \u0627\u0644\u0636\u063a\u0637\u061b;<\/li>\n<li>\u0638\u0631\u0648\u0641 \u0627\u0644\u062a\u0646\u0641\u064a\u0633\u061b;<\/li>\n<li>\u0627\u0644\u0637\u0648\u0631 \u0627\u0644\u0633\u0627\u0626\u0644 \u0648\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0648\u0638\u0631\u0648\u0641 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>\u0623\u062f\u0644\u0629 \u0648\u0648\u062b\u0627\u0626\u0642 \u0633\u0639\u0629 \u0627\u0644\u0635\u0645\u0627\u0645 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u062d\u0627\u0643\u0645.<\/li>\n<\/ul>\n<p>\n      \u0646\u0638\u0631\u064b\u0627 \u0644\u0623\u0646 \u0645\u062c\u0645\u0648\u0639\u0627\u062a \u0627\u0644\u0645\u062f\u062e\u0644\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629\u060c \u0644\u0627 \u064a\u0646\u0628\u063a\u064a \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0645\u062d\u062f\u062f \u0639\u0628\u0631 \u0645\u0633\u0627\u0631 \u0648\u0627\u062d\u062f \u0639\u0644\u0649 \u0623\u0646\u0647 \u0645\u0646\u0627\u0633\u0628 \u0644\u0644\u0645\u0633\u0627\u0631 \u0627\u0644\u0622\u062e\u0631 \u0644\u0645\u062c\u0631\u062f \u0623\u0646 \u0643\u0644\u0627 \u0627\u0644\u062c\u0647\u0627\u0632\u064a\u0646 \u0644\u0647\u0645\u0627 \u0648\u0638\u064a\u0641\u0629 \u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0644\u0636\u063a\u0637.\n    <\/p>\n<h3 id=\"pvsv-h3-mechanical-fit\">\u0627\u0644\u062a\u0648\u0627\u0641\u0642 \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a \u0623\u0648 \u0625\u0639\u062f\u0627\u062f \u0645\u0645\u0627\u062b\u0644 \u0644\u0627 \u064a\u062b\u0628\u062a \u0627\u0644\u062a\u0643\u0627\u0641\u0624<\/h3>\n<p>\n      \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0623\u0648\u062c\u0647 \u0627\u0644\u062a\u0634\u0627\u0628\u0647 \u0627\u0644\u0633\u0637\u062d\u064a\u0629 \u0645\u0641\u064a\u062f\u0629 \u0644\u062a\u062d\u062f\u064a\u062f \u0628\u062f\u064a\u0644 \u0645\u062d\u062a\u0645\u0644\u060c \u0644\u0643\u0646\u0647\u0627 \u0644\u064a\u0633\u062a \u0643\u0627\u0641\u064a\u0629 \u0644\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0639\u0644\u0649 \u062a\u0643\u0627\u0641\u0624 \u0627\u0644\u062d\u0645\u0627\u064a\u0629.\n    <\/p>\n<ul>\n<li><strong>\u062a\u0637\u0627\u0628\u0642 \u0627\u0644\u062a\u0648\u0635\u064a\u0644:<\/strong> \u064a\u0628\u062f\u0648 \u0623\u0646 \u0627\u0644\u0628\u062f\u064a\u0644 \u064a\u0646\u0627\u0633\u0628 \u0646\u0641\u0633 \u0645\u062f\u062e\u0644 \u0623\u0648 \u0645\u062e\u0631\u062c \u0623\u0648 \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0641\u0644\u0646\u062c\u0629.<\/li>\n<li><strong>\u062a\u0637\u0627\u0628\u0642 \u0627\u0644\u0625\u0639\u062f\u0627\u062f:<\/strong> \u064a\u0628\u062f\u0648 \u0623\u0646 \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0636\u063a\u0637 \u0645\u0634\u0627\u0628\u0647 \u0644\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u062d\u0627\u0644\u064a.<\/li>\n<li><strong>\u0627\u0644\u062a\u0634\u0627\u0628\u0647 \u0627\u0644\u0641\u064a\u0632\u064a\u0627\u0626\u064a:<\/strong> \u064a\u0628\u062f\u0648 \u0623\u0646 \u0627\u0644\u062c\u0647\u0627\u0632 \u0642\u0627\u062f\u0631 \u0639\u0644\u0649 \u0627\u0644\u062a\u0631\u0643\u064a\u0628 \u0641\u064a \u0646\u0641\u0633 \u0627\u0644\u0645\u0648\u0642\u0639.<\/li>\n<\/ul>\n<p>\n      \u0642\u062f \u062a\u0639\u0627\u0644\u062c \u0647\u0630\u0647 \u0627\u0644\u0645\u0644\u0627\u062d\u0638\u0627\u062a \u0627\u0644\u062a\u0648\u0627\u0641\u0642 \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a\u060c \u0644\u0643\u0646\u0647\u0627 <strong>\u0644\u0627 \u062a\u062b\u0628\u062a \u062a\u0643\u0627\u0641\u0624 \u0627\u0644\u062d\u0645\u0627\u064a\u0629<\/strong>.\n    <\/p>\n<p>\n      \u0642\u0628\u0644 \u0627\u0644\u0645\u0648\u0627\u0641\u0642\u0629 \u0639\u0644\u0649 \u0627\u0644\u0627\u0633\u062a\u0628\u062f\u0627\u0644\u060c \u064a\u062c\u0628 \u0623\u0646 \u064a\u062c\u064a\u0628 \u0627\u0644\u0645\u0631\u0627\u062c\u0639\u0629 \u0639\u0644\u0649 \u0647\u0630\u0647 \u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629:\n    <\/p>\n<ol>\n<li>\u0647\u0644 \u064a\u062a\u0645 \u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0628\u062f\u064a\u0644 \u0644\u0646\u0641\u0633 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u062d\u0645\u064a\u0629 \u0648\u0628\u0646\u0641\u0633 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u061f<\/li>\n<li>Does it preserve the required function: pressure-and-vacuum tank protection or pressurized-equipment overpressure relief?<\/li>\n<li>Are the governing operating, emergency or overpressure scenarios still represented in the sizing basis?<\/li>\n<li>Does the proposed device have suitable capacity evidence and installed-condition information for the relevant protection path?<\/li>\n<\/ol>\n<p>\n      If any of those questions remains unresolved, matching dimensions or one similar pressure value should not be used to close the equivalence decision.\n    <\/p>\n<h3 id=\"pvsv-h3-replacement-duty\">Replacement Must Preserve the Actual Protection Duty<\/h3>\n<p>\n      A sound replacement review should reconstruct the original protection requirement before approving the substitute.\n    <\/p>\n<p>\n      If the existing device protects a tank against both excessive pressure and excessive vacuum, the replacement review should retain both functions and the relevant pressure-side and vacuum-side capacity requirements.\n    <\/p>\n<p>\n      If the existing device protects pressurized equipment against an applicable overpressure case, the replacement should be checked against that relieving requirement rather than only against the old valve&#8217;s nominal connection.\n    <\/p>\n<p>\n      If the original engineering inputs are unavailable, treat them as unresolved project data rather than inferring them from appearance, catalog dimensions or a single pressure designation.\n    <\/p>\n<p>\n      The central substitution rule is: <strong>matching hardware does not establish matching duty, and matching one pressure value does not establish matching sizing basis.<\/strong>\n    <\/p>\n<\/section>\n<section\n    id=\"pvsv-rfq-routing\"\n    aria-labelledby=\"pvsv-h2-rfq-routing\"\n  ><\/p>\n<h2 id=\"pvsv-h2-rfq-routing\">What to Send in an RFQ for Each Protection Route<\/h2>\n<p>\n      A useful RFQ should make the protection problem visible to the supplier or engineering reviewer. Valve size, pressure and material alone are often not enough to distinguish a tank PVRV requirement from a pressurized-equipment safety-valve requirement.\n    <\/p>\n<p>\n      The required project data can vary, but the following two branches provide a practical starting point. Missing governing data should be marked as unresolved rather than filled from an unrelated catalog value.\n    <\/p>\n<h3 id=\"pvsv-h3-rfq-pvrv\">PVRV \/ Tank-Venting Input Branch<\/h3>\n<p>\n      For an atmospheric or low-pressure tank pressure-vacuum enquiry, provide the applicable information available for the project:\n    <\/p>\n<ul>\n<li>protected tank type and design basis;<\/li>\n<li>\u0636\u063a\u0637 \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646\u061b;<\/li>\n<li>\u062a\u0641\u0631\u064a\u063a \u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062e\u0632\u0627\u0646\u061b;<\/li>\n<li>required pressure-side setting;<\/li>\n<li>required vacuum-side setting;<\/li>\n<li>filling or inflow basis;<\/li>\n<li>emptying or pump-out basis;<\/li>\n<li>thermal venting basis where relevant;<\/li>\n<li>blanketing-system information where present;<\/li>\n<li>required pressure-side venting capacity;<\/li>\n<li>required vacuum-side venting capacity;<\/li>\n<li>emergency venting basis;<\/li>\n<li>vent or discharge arrangement and relevant restrictions;<\/li>\n<li>process medium or vapor and material-compatibility requirements;<\/li>\n<li>existing valve data sheet or identification information for replacement work.<\/li>\n<\/ul>\n<p>\n      The purpose of this branch is not to perform PVRV sizing inside the RFQ. It is to make sure the enquiry shows that <strong>pressure-side, vacuum-side and emergency requirements are separate questions that may each need verification<\/strong>.\n    <\/p>\n<h3 id=\"pvsv-h3-rfq-safety-valve\">Safety-Valve \/ Overpressure Input Branch<\/h3>\n<p>\n      For a safety-valve enquiry on applicable pressurized equipment, provide the applicable project information available for the relief review:\n    <\/p>\n<ul>\n<li>protected equipment;<\/li>\n<li>\u0633\u064a\u0646\u0627\u0631\u064a\u0648 \u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0645\u0637\u0628\u0642\u061b;<\/li>\n<li>applicable equipment or project design basis;<\/li>\n<li>operating pressure;<\/li>\n<li>required set pressure;<\/li>\n<li>\u0633\u0639\u0629 \u0627\u0644\u062a\u0646\u0641\u064a\u0633 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629\u061b;<\/li>\n<li>relieving pressure and temperature conditions;<\/li>\n<li>fluid phase and required fluid-property information;<\/li>\n<li>candidate orifice or available capacity information, if already established;<\/li>\n<li>\u0627\u0644\u0636\u063a\u0637 \u0627\u0644\u062e\u0644\u0641\u064a \u0648\u0638\u0631\u0648\u0641 \u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0641\u0631\u064a\u063a\u061b;<\/li>\n<li>required capacity certification or supporting documentation where applicable;<\/li>\n<li>existing valve nameplate, data sheet or sizing calculation for replacement work.<\/li>\n<\/ul>\n<p>\n      This branch is built around the <strong>overpressure relieving requirement and the evidence needed to verify the proposed device against it<\/strong>, not around tank inbreathing and outbreathing.\n    <\/p>\n<figure class=\"wp-block-image size-full zobai-figure\" data-image-slot=\"IMG-04\"><img loading=\"lazy\" src=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04.webp\" alt=\"Two-branch RFQ checklist separating tank pressure-vacuum inputs from safety-valve overpressure inputs.\" title=\"Pressure Vacuum Relief Valve vs Safety Valve: Different Duties and Sizing Bases - IMG-04\" width=\"1200\" height=\"900\" class=\"wp-image-56763\" decoding=\"async\" srcset=\"https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04.webp 1200w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04-300x225.webp 300w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04-1024x768.webp 1024w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04-768x576.webp 768w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04-16x12.webp 16w, https:\/\/zobai.com\/wp-content\/uploads\/2026\/09\/pressure-vacuum-relief-valve-vs-safety-valve-different-duties-and-sizing-bases-img-04-400x300.webp 400w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption>A useful RFQ identifies the protection route and supplies the engineering data required for that route.<\/figcaption><\/figure>\n<h3 id=\"pvsv-h3-route-owner\">When to Route the Question to a Dedicated Technical Owner<\/h3>\n<p>\n      This comparison should stop once the correct protection path is identified.\n    <\/p>\n<p>\n      A tank question that requires detailed normal venting, emergency venting or blanketing analysis belongs in the tank-venting engineering path.\n    <\/p>\n<p>\n      A safety-valve question that requires relieving-load calculation, orifice selection or detailed capacity verification belongs in the dedicated safety-valve sizing path.\n    <\/p>\n<p>\n      A general safety-valve construction or selection question belongs in the safety-valve selection topic.\n    <\/p>\n<aside class=\"pvsv-triage\" aria-label=\"Engineering triage note\">\n<p>\n        If the available project information is not sufficient to determine which protection path applies, use engineering triage before product substitution or quotation. Do not close the comparison from connection size, visual similarity or one pressure designation while the underlying duty or sizing basis remains unresolved.\n      <\/p>\n<\/aside>\n<\/section>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>A pressure-vacuum relief valve (PVRV) and a safety valve can both respond to pressure conditions, but they solve different protection problems. In this article, a PVRV means a device used as part of the pressure-and-vacuum protection of an atmospheric or low-pressure storage tank. A safety valve means an overpressure protection device applied to pressurized equipment&#8230;<\/p>","protected":false},"author":2,"featured_media":56760,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[],"class_list":["post-56658","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\/56658","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=56658"}],"version-history":[{"count":2,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56658\/revisions"}],"predecessor-version":[{"id":56771,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/posts\/56658\/revisions\/56771"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media\/56760"}],"wp:attachment":[{"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/media?parent=56658"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/categories?post=56658"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zobai.com\/ar\/wp-json\/wp\/v2\/tags?post=56658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}