{"id":3843,"date":"2025-10-17T09:15:10","date_gmt":"2025-10-17T01:15:10","guid":{"rendered":"https:\/\/ballvalves.tw\/?post_type=product&#038;p=3843"},"modified":"2026-10-08T09:13:13","modified_gmt":"2026-10-08T01:13:13","slug":"%d8%b5%d9%85%d8%a7%d9%85-%d9%81%d8%ad%d8%b5-%d8%b5%d8%a7%d9%85%d8%aa","status":"publish","type":"product","link":"https:\/\/ballvalves.tw\/ar\/product\/silent-check-valve\/","title":{"rendered":"Stainless Steel Silent Check Valve \u2013 Spring Loaded, Non-Slam, 304, 1\/2\u2033\u20132\u2033"},"content":{"rendered":"<div style=\"display: flex;flex-wrap: wrap;align-items: stretch;gap: 12px;margin: 18px 0\"><a style=\"display: block;min-width: 230px;flex: 1 1 calc(33.333% - 8px);padding: 17px 19px;background: #f3f8fd;border: 1px solid #c7dcef;border-left: 5px solid #1261a0;border-radius: 9px;color: #17324d!important;text-decoration: none;cursor: pointer\" href=\"https:\/\/ballvalves.tw\/wp-content\/uploads\/2025\/10\/1PC-Check-Valve-1.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"display: inline-block;margin-right: 10px;padding: 6px 9px;background: #1261a0;color: #ffffff!important;border-radius: 5px;font-size: 12px;font-weight: bold;letter-spacing: .5px\">PDF<\/span><strong style=\"color: #17324d!important;font-size: 17px\">\u0635\u0645\u0627\u0645 \u0641\u062d\u0635 \u0648\u0627\u062d\u062f<\/strong><span style=\"display: block;margin-top: 10px;color: #5d7185!important;font-size: 13px\">\u0645\u0632\u0648\u062f\u0629 \u0628\u0646\u0627\u0628\u0636 \u00b7 \u0648\u0631\u0642\u0629 \u0627\u0644\u0623\u0628\u0639\u0627\u062f <strong style=\"color: #1261a0!important\">\u062a\u0646\u0632\u064a\u0644 \u0645\u0644\u0641 PDF \u2193<\/strong><\/span><\/a><\/div>\n<h2>\u0648\u0635\u0641 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n<p>The SC-1 is a one-piece silent check valve \u2014 also sold as a spring check valve or inline check valve. A stainless spring pushes the piston closed <i>\u0642\u0628\u0644<\/i> flow fully reverses, so the valve shuts quietly instead of slamming and puts far less shock on pumps and pipes when the pump stops. The one-piece body is compact enough for tight spaces around pumps and manifolds.<\/p>\n<p>The body, piston and cap are cast 304 stainless steel (CF8), with a CF8M (cast 316) version made to order. Female PT threads are in stock, sizes 1\/2\u2033 to 2\u2033; NPT and PF can be made to order. Prefer a hinged-disc valve with lower pressure drop? See the <a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d9%81%d8%ad%d8%b5-%d9%85%d9%84%d9%88%d9%84%d8%a8\/\">stainless steel swing check valve<\/a>, \u060c \u0623\u0648 \u062a\u0635\u0641\u062d \u0627\u0644\u0643\u0644 <a href=\"https:\/\/ballvalves.tw\/ar\/%d9%81%d8%a6%d8%a9+%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/check-valve\/\">\u0635\u0645\u0627\u0645\u0627\u062a \u0641\u062d\u0635 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623<\/a>.<\/p>\n<h2>Silent (Spring) or Swing \u2014 Which Check Valve?<\/h2>\n<table style=\"border-collapse:collapse;width:100%;margin:12px 0\">\n<thead>\n<tr>\n<th style=\"border:1px solid #dddddd;padding:8px;text-align:left\"><\/th>\n<th style=\"border:1px solid #dddddd;padding:8px;text-align:left\">Silent \/ spring check (this valve)<\/th>\n<th style=\"border:1px solid #dddddd;padding:8px;text-align:left\">Swing check<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0644\u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u062e\u062a\u0627\u0645\u064a<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">A spring closes the piston before flow fully reverses (non-slam)<\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u062a\u0639\u0645\u0644 \u0627\u0644\u062c\u0627\u0630\u0628\u064a\u0629 \u0648\u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0639\u0643\u0633\u064a \u0639\u0644\u0649 \u0625\u063a\u0644\u0627\u0642 \u0627\u0644\u0642\u0631\u0635 \u0627\u0644\u0645\u0641\u0635\u0644\u064a<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u0636\u063a\u0637<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u0623\u0639\u0644\u0649 \u2014 \u064a\u0642\u0639 \u0627\u0644\u0632\u0646\u0628\u0631\u0643 \u0641\u064a \u0645\u0633\u0627\u0631 \u0627\u0644\u062a\u062f\u0641\u0642<\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u0645\u0646\u062e\u0641\u0636 \u2014 \u064a\u062a\u0623\u0631\u062c\u062d \u0627\u0644\u0642\u0631\u0635 \u0628\u0639\u064a\u062f\u064b\u0627 \u0639\u0646 \u062a\u062c\u0648\u064a\u0641 \u0627\u0644\u0645\u0627\u0633\u0648\u0631\u0629<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0644\u0623\u0641\u0636\u0644 \u0644\u0640<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u0645\u062e\u0631\u062c \u0627\u0644\u0645\u0636\u062e\u0629 \u0648\u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0639\u0631\u0636\u0629 \u0644\u0638\u0627\u0647\u0631\u0629 \u00ab\u0627\u0644\u0636\u0631\u0628\u0629 \u0627\u0644\u0645\u0627\u0626\u064a\u0629\u00bb<\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u062e\u0637\u0648\u0637 \u0627\u0644\u0645\u064a\u0627\u0647 \u0648\u0627\u0644\u0646\u0641\u0637 \u0648\u0627\u0644\u063a\u0627\u0632 \u0627\u0644\u0639\u0627\u0645\u0629 \u0627\u0644\u062a\u064a \u064a\u064f\u0639\u062f \u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u0636\u063a\u0637 \u0641\u064a\u0647\u0627 \u0639\u0627\u0645\u0644\u0627\u064b \u0645\u0647\u0645\u064b\u0627<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0641\u0646\u064a\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<table style=\"border-collapse:collapse;width:100%;margin:12px 0\">\n<tbody>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0644\u0646\u0648\u0639<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">Silent check valve \u2014 one-piece, spring loaded (inline \/ spring check valve)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0644\u0637\u0631\u0627\u0632<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">SC-1<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0646\u0637\u0627\u0642 \u0627\u0644\u0623\u062d\u062c\u0627\u0645<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">1\/2 \u0628\u0648\u0635\u0629 \u2013 2 \u0628\u0648\u0635\u0629<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>Body, piston &amp; cap<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">CF8 \u2014 \u0627\u0644\u0646\u0648\u0639 \u0627\u0644\u0645\u0635\u0628\u0648\u0628 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 304 \u2014 \u0645\u062a\u0648\u0641\u0631 \u0641\u064a \u0627\u0644\u0645\u062e\u0632\u0648\u0646\u061b CF8M (\u0627\u0644\u0646\u0648\u0639 \u0627\u0644\u0645\u0635\u0628\u0648\u0628 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 316) \u064a\u064f\u0635\u0646\u0639 \u062d\u0633\u0628 \u0627\u0644\u0637\u0644\u0628<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>Spring<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">SS304 (SS316 on the 316 version)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0625\u0646\u0647\u0627\u0621 \u0627\u0644\u0627\u062a\u0635\u0627\u0644<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">\u062e\u064a\u0648\u0637 PT \u0627\u0644\u0623\u0646\u062b\u0648\u064a\u0629 \u2014 \u0645\u062a\u0648\u0641\u0631\u0629 \u0641\u064a \u0627\u0644\u0645\u062e\u0632\u0648\u0646\u061b \u0623\u0645\u0627 \u062e\u064a\u0648\u0637 NPT \u0648PF \u0641\u062a\u064f\u0635\u0646\u0639 \u062d\u0633\u0628 \u0627\u0644\u0637\u0644\u0628<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #dddddd;padding:8px\"><b>\u0627\u0644\u0628\u0646\u0627\u0621<\/b><\/td>\n<td style=\"border:1px solid #dddddd;padding:8px\">One-piece body, compact face-to-face<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n<ul>\n<li><strong>Pump discharge lines<\/strong> \u2014 the spring closes the valve before reverse flow builds, which reduces slam and pressure surge when the pump trips.<\/li>\n<li><strong>Municipal water supply and booster pump stations<\/strong> \u2014 quiet, fast-closing check duty on clean water.<\/li>\n<li><strong>HVAC and high-rise booster systems<\/strong> \u2014 silent closing in mechanical rooms next to occupied space.<\/li>\n<li><strong>Cooling-water loops<\/strong> \u2014 clean water only; not for media with suspended solids.<\/li>\n<li><strong>Pump skids and tight manifolds<\/strong> \u2014 the short one-piece body fits where a swing check will not.<\/li>\n<li><strong>Vertical lines with upward flow<\/strong> \u2014 the spring closes the valve, so it does not rely on gravity.<\/li>\n<li><strong>Small-bore, low-pressure water distribution lines<\/strong> \u2014 1\/2\u2033\u20132\u2033 threaded connections.<\/li>\n<li><strong><a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d8%aa%d8%b7%d8%a8%d9%8a%d9%82%d8%a7%d8%aa\/%d8%aa%d8%b7%d8%a8%d9%8a%d9%82-%d9%85%d8%b9%d8%a7%d9%84%d8%ac%d8%a9-%d8%a7%d9%84%d9%85%d9%8a%d8%a7%d9%87\/\">Water treatment plants<\/a><\/strong> \u2014 clean-water lines and pump discharge, not sludge.<\/li>\n<\/ul>\n<p>Where slam noise is not a concern and the line is horizontal, the <a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d9%81%d8%ad%d8%b5-%d9%85%d9%84%d9%88%d9%84%d8%a8\/\">stainless steel swing check valve<\/a> is the lower-cost option; for 2\u2033\u20134\u2033 flanged lines, see the <a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d9%81%d8%ad%d8%b5-%d8%b0%d9%88-%d8%ad%d9%88%d8%a7%d9%81-304\/\">stainless steel flanged check valve<\/a>.<\/p>\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<p><b>Why is it called a silent check valve?<\/b> Because it closes quietly. The spring pushes the piston shut before flow fully reverses, so very little backflow builds up to slam the valve. That greatly reduces the bang often heard when a swing check valve shuts after a pump stops.<\/p>\n<p><b>Is this the same as a spring check valve or inline check valve?<\/b> Yes \u2014 silent check valve, spring check valve and inline check valve are different names for the same design: a spring-loaded piston inside a straight one-piece body.<\/p>\n<p><b>Silent or swing check \u2014 which one do I need?<\/b> Choose this silent type for pump discharge and lines prone to water hammer. Choose the <a href=\"https:\/\/ballvalves.tw\/ar\/%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/%d8%b5%d9%85%d8%a7%d9%85-%d9%81%d8%ad%d8%b5-%d9%85%d9%84%d9%88%d9%84%d8%a8\/\">swing check valve<\/a> where low pressure drop matters more \u2014 its disc swings fully clear of the bore.<\/p>\n<p><b>\u0645\u0627 \u0647\u064a \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u0635\u0646\u0648\u0639 \u0645\u0646\u0647\u0627\u061f<\/b> Body, piston and cap are cast 304 stainless steel (CF8) with a SS304 spring \u2014 in stock. A 316 version (CF8M castings, SS316 spring) is made to order.<\/p>\n<p><b>\u0645\u0627 \u0647\u064a \u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u062e\u064a\u0648\u0637 \u0627\u0644\u0645\u062a\u0648\u0641\u0631\u0629\u061f<\/b> Female PT threads are in stock, sizes 1\/2\u2033\u20132\u2033. NPT and PF can be made to order \u2014 tell us which standard your piping uses when you request a quote.<\/p>\n<p><b>\u0645\u0627 \u0647\u0648 \u0627\u0644\u062d\u062f \u0627\u0644\u0623\u062f\u0646\u0649 \u0644\u0644\u0637\u0644\u0628\u061f<\/b> No minimum order quantity \u2014 we accept orders of any size, including small trial orders.<\/p>","protected":false},"excerpt":{"rendered":"<p>A stainless steel silent check valve (spring check valve), one-piece, in cast 304 (CF8) \u2014 the spring closes the piston before flow reverses, which reduces slam and pressure surge when the pump stops. Female PT threads in stock, sizes 1\/2\u2033\u20132\u2033; NPT and PF threads and a 316 (CF8M) version made to order. The compact one-piece body fits tight spaces.<\/p>\n<p style=\"font-size: 14px;color: #666666\">ISO 9001 \u00b7 CE \u00b7 Manufacturer since 1999 \u00b7 Made in Taiwan<\/p>","protected":false},"featured_media":3975,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[78],"product_cat":[65],"product_tag":[],"class_list":["post-3843","product","type-product","status-publish","has-post-thumbnail","product_brand-yzng-trong","product_cat-check-valve","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","taxable","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product\/3843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/media\/3975"}],"wp:attachment":[{"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/media?parent=3843"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_brand?post=3843"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_cat?post=3843"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ballvalves.tw\/ar\/wp-json\/wp\/v2\/product_tag?post=3843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}