{"id":7670,"date":"2024-12-24T11:43:41","date_gmt":"2024-12-24T03:43:41","guid":{"rendered":"https:\/\/www.stvvalves.com\/?p=7670"},"modified":"2024-12-25T11:54:08","modified_gmt":"2024-12-25T03:54:08","slug":"types-of-check-valves","status":"publish","type":"post","link":"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/","title":{"rendered":"Types of Check Valves"},"content":{"rendered":"<p><strong>Check valves are available in the following designs:<\/strong><\/p>\n<ol>\n<li>Swing Check Valves<\/li>\n<li>Tilting Disk Check Valves<\/li>\n<li>Wafer Check Valves<\/li>\n<li>Disk Check Valves<\/li>\n<li>Piston Check Valves<\/li>\n<li>Ball Check Valves<\/li>\n<li>Duo-Check Valves<\/li>\n<li>Non-Slam Check Valves<\/li>\n<\/ol>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#SWING_CHECK_VALVE\" >SWING CHECK VALVE<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#Industry_Codes_and_Standards\" >Industry Codes and Standards<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#TILTING_DISK_CHECK_VALVE\" >TILTING DISK CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#WAFER_TYPE_CHECK_VALVE\" >WAFER TYPE CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#DISC_CHECK_VALVE\" >DISC CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#PISTON_CHECK_VALVE\" >PISTON CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#BALL_CHECK_VALVE\" >BALL CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#DUAL_PLATE_WAFER_CHECK_VALVE\" >DUAL PLATE WAFER CHECK VALVE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.stvvalves.com\/it\/types-of-check-valves\/#NON-SLAM_CHECK_VALVE\" >NON-SLAM CHECK VALVE<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"SWING_CHECK_VALVE\"><\/span><span id=\"swing-check-valve\" class=\"ez-toc-section\"><\/span>SWING CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Swing Check Valves are available in straight body design and y-pattern design. The disk is suspended from the body by means of a hinge pin and seals against the seat which is integral with the body.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7500\" src=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-300x300.jpg\" alt=\"China 300LB CF8 Swing Check Valve Manufacture\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-300x300.jpg 300w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-100x100.jpg 100w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-600x600.jpg 600w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-80x80.jpg 80w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-768x768.jpg 768w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-12x12.jpg 12w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-36x36.jpg 36w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-180x180.jpg 180w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-705x705.jpg 705w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-120x120.jpg 120w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End-450x450.jpg 450w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2024\/08\/CF8-Swing-Check-Valve-16-Inch-CL300-Flange-End.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>These valves are typically used in sizes 2 inches and over. Swing check valves can be installed in both horizontal and vertical position. They are not suitable for pulsating flow.<\/p>\n<p>Closure response of swing check valve is slower compared to lift check valve due to longer disc travel and inertia of disk.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Industry_Codes_and_Standards\"><\/span><strong>Industry Codes and Standards<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Valve Design :\u00a0\u00a0\u00a0\u00a0\u00a0BS 1868 \/ API 6D<\/li>\n<li>Pressure Testing : BS 6755-I<\/li>\n<li>Face To Face : ANSI B 16.10<\/li>\n<li>Flange Drilling : ANSI B 16.5 \/ BS 10 Table \/ DIN \/ IS \/ JIS Std.<\/li>\n<li>Butt Weld End : ANSI B 16.25<\/li>\n<li>Face to Face : ANSI B 16.10<\/li>\n<li>Socket Weld End : ANSI B 16.11<\/li>\n<li>Screwed End : ANSI B 1.20.1(BSP\/NPT)<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"TILTING_DISK_CHECK_VALVE\"><\/span><span id=\"tilting-disk-check-valve\" class=\"ez-toc-section\"><\/span>TILTING DISK CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tilting Disk Check Valves\u00a0fit between two flanges and provide a compact installation for large diameter applications.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6990\" src=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-300x300.jpg\" alt=\"Flange Tilting Disc Check Valve\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-300x300.jpg 300w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-100x100.jpg 100w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-600x600.jpg 600w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-80x80.jpg 80w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-12x12.jpg 12w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-36x36.jpg 36w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-180x180.jpg 180w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-705x705.jpg 705w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-120x120.jpg 120w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch-450x450.jpg 450w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/12\/flange-tilting-disc-check-valve-wcb-body-300lb-14-inch.jpg 750w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>These valves can be installed in horizontal and vertical lines.<\/p>\n<p>They provide a quick closing response and are particularly suited for pulsating flows with compressible fluids.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"WAFER_TYPE_CHECK_VALVE\"><\/span><span id=\"wafer-type-check-valve\" class=\"ez-toc-section\"><\/span>WAFER TYPE CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Wafer Type Check Valve has short face-to-face dimensions and low weight allows a simple space saving installation between the companion flanges.<\/p>\n<p>The valves are suitable to mounting between weld neck or slip on type companion flanges of different standards.<span id=\"ezoic-pub-ad-placeholder-166\" class=\"ezoic-adpicker-ad\"><\/span><\/p>\n<div dir=\"ltr\">\n<div class=\"essb-pin aligncenter wp-image-28368 size-full ezlazyloaded essb-pinid-1\">\n<div id=\"attachment_6757\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-6757\" class=\"size-medium wp-image-6757\" src=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-300x300.png\" alt=\"C95800 Thin wafer check valve\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-300x300.png 300w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-100x100.png 100w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-600x600.png 600w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-1030x1030.png 1030w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-80x80.png 80w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-768x768.png 768w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-36x36.png 36w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-180x180.png 180w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594-705x705.png 705w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/05\/thin-wafer-check-valve-astm-b148-c95800-14-in-cl150-api-594.png 1148w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-6757\" class=\"wp-caption-text\">valvola-di-ritegno-wafer-sottile-astm-b148-c95800-14-in-cl150-api-594<\/p><\/div>\n<\/div>\n<\/div>\n<p>They are specially developed for applications where a low-pressure loss is essential. Opening and closing of the valve will take place at an extremely low-pressure difference over the valve disc.<\/p>\n<p>The eccentric disc shaft combination with the disc seat guarantees a positive shut off returning media. Wafer check valves are becoming the preferred type of check valve for most applications, due to their compact design and relatively low cost.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DISC_CHECK_VALVE\"><\/span><span id=\"disc-check-valve\" class=\"ez-toc-section\"><\/span>DISC CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Single Disc Check Valve (Wafer Type Disc Check Valve) consists of four main components: the body, a disc, a star guide and a spring.<\/p>\n<p>The Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-28369 size-full ezlazyloaded\" title=\"Disc check valves Theory\" src=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:603x296\/rscb2\/ng:webp\/ngcb2\" sizes=\"auto, (max-width: 603px) 100vw, 603px\" srcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 603w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY-420x206.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" alt=\"Disc check valves Theory\" width=\"603\" height=\"296\" data-ezsrcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 603w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY-420x206.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" data-ezsrc=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/DISC-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:603x296\/rscb2\/ng:webp\/ngcb2\" data-essbisindex=\"1\" \/><\/p>\n<p>The design of Wafer Design, Sandwich Type Single Disc Spring Loaded Check Valves allows them to be installed between any flanges of different standard and in any position; including vertical pipelines where the fluid flows downwards.<\/p>\n<div class=\"essb-pin aligncenter wp-image-28370 size-medium ezlazyloading essb-pinid-2\"><\/div>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"PISTON_CHECK_VALVE\"><\/span><span id=\"piston-check-valve\" class=\"ez-toc-section\"><\/span>PISTON CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Piston Check valves are generally used to protect pumps or similar equipment, allowing the flow only in one direction and preventing flow reversal due to back pressure.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-28371 size-full ezlazyloaded\" title=\"Piston Check valve Theory\" src=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:533x264\/rscb2\/ng:webp\/ngcb2\" sizes=\"auto, (max-width: 533px) 100vw, 533px\" srcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 533w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY-420x208.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" alt=\"Piston Check valve Theory\" width=\"533\" height=\"264\" data-ezsrcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 533w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY-420x208.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" data-ezsrc=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/PISTON-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:533x264\/rscb2\/ng:webp\/ngcb2\" data-essbisindex=\"3\" \/><\/p>\n<p>The piston check valves are designed with globe valve bodies, producing an increased drop pressure in the pipeline. This design provides a tight seal as well as a fast reaction to the closure impulse.<\/p>\n<p>Metal seated check valves may not provide drop tight sealing when used in gas system or fluid system with low back flow pressure or fluids containing particles.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"BALL_CHECK_VALVE\"><\/span><span id=\"ball-check-valve\" class=\"ez-toc-section\"><\/span>BALL CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The ball check valve is one of the few check valves that works well in both water and wastewater applications.<\/p>\n<p>Ball check valves\u00a0are simple in operation and commonly used on small pumps and in low head systems.<\/p>\n<div class=\"essb-pin aligncenter wp-image-28372 size-full ezlazyloading essb-pinid-3\"><img loading=\"lazy\" decoding=\"async\" class=\"pin-generated ezlazyloaded\" title=\"Ball check valve Theory\" src=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:778x402\/rscb2\/ng:webp\/ngcb2\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" srcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 833w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-420x217.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-768x396.jpg?ezimgfmt=ng:webp\/ngcb2 768w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-720x372.jpg?ezimgfmt=ng:webp\/ngcb2 720w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" alt=\"Ball check valve Theory\" width=\"833\" height=\"430\" data-ezsrcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 833w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-420x217.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-768x396.jpg?ezimgfmt=ng:webp\/ngcb2 768w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-720x372.jpg?ezimgfmt=ng:webp\/ngcb2 720w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY-20x10.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" data-ezsrc=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/BALL-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:778x402\/rscb2\/ng:webp\/ngcb2\" data-essbisindex=\"2\" \/><\/div>\n<p>Consider adding an optional roll-bar to the piping system for safety; ball check valves have the highest tendency to slam due to the ball\u2019s high inertia long stroke.<\/p>\n<p>When ball check valves encounter high pressures and dynamics, severe slamming may result.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"DUAL_PLATE_WAFER_CHECK_VALVE\"><\/span><span id=\"dual-plate-wafer-check-valve\" class=\"ez-toc-section\"><\/span>DUAL PLATE WAFER CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Dual Plate, Wafer Check Valve employs two-spring-loaded plates hinged on a central hinge pin.<\/p>\n<p>When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6984\" src=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-300x300.jpg\" alt=\"Tilting Disc Check Valve\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-300x300.jpg 300w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-100x100.jpg 100w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-600x600.jpg 600w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-80x80.jpg 80w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-768x768.jpg 768w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-12x12.jpg 12w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-36x36.jpg 36w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-180x180.jpg 180w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-705x705.jpg 705w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-120x120.jpg 120w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch-450x450.jpg 450w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2023\/11\/tilting-disc-check-valve-cf8m-body-150lb-4-inch.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>All features put together make the Dual Plate Check Valve as the most efficient &amp; versatile design. It is also referred to as\u00a0<strong>SILENT CHECK VALVE.\u00a0<\/strong><\/p>\n<p>It is much easier to install between standard gaskets and line flanges, and therefore is more cost effective to install and to maintain. Its design complies with API 594 and API 6D, testing with API 598.<\/p>\n<p>It is also called as\u00a0<strong>Butterfly Check Valve.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NON-SLAM_CHECK_VALVE\"><\/span><span id=\"non-slam-check-valve\" class=\"ez-toc-section\"><\/span>NON-SLAM CHECK VALVE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The swing check valve closes abruptly because of gravity, and causes pressure surge resulting in shock waves.<\/p>\n<p>These high pressure waves causes sever stress on the piping system.<\/p>\n<div class=\"essb-pin aligncenter wp-image-28374 size-full ezlazyloading essb-pinid-4\"><img loading=\"lazy\" decoding=\"async\" class=\"pin-generated ezlazyloaded\" title=\"Non-Slam Check Valve Theory\" src=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:424x313\/rscb2\/ng:webp\/ngcb2\" sizes=\"auto, (max-width: 424px) 100vw, 424px\" srcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 424w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY-420x310.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY-20x15.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" alt=\"Non-Slam Check Valve Theory\" width=\"424\" height=\"313\" data-ezsrcset=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY.jpg?ezimgfmt=ng:webp\/ngcb2 424w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY-420x310.jpg?ezimgfmt=ng:webp\/ngcb2 420w,https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY-20x15.jpg?ezimgfmt=ng:webp\/ngcb2 20w\" data-ezsrc=\"https:\/\/instrumentationtools.com\/wp-content\/uploads\/2018\/05\/NON-SLAM-CHECK-VALVE-THEORY.jpg?ezimgfmt=rs:424x313\/rscb2\/ng:webp\/ngcb2\" data-essbisindex=\"6\" \/><\/div>\n<p>This problem can be minimized by installing a Non-Slam type check valve. Non-Slam check valve do not rely on gravity. As the upstream velocity of the fluid slows the spring assist on the valve start to close the disc.<\/p>\n<p>By the time the upstream velocity comes to 0, the disc is completely closed. With the reverse flow eliminated, the force necessary to produce water hammer on either side of the valve are substantially reduced.<\/p>","protected":false},"excerpt":{"rendered":"<p>Check valves are available in the following designs: Swing Check Valves Tilting Disk Check Valves Wafer Check Valves Disk Check Valves Piston Check Valves Ball Check Valves Duo-Check Valves Non-Slam Check Valves SWING CHECK VALVE Swing Check Valves are available in straight body design and y-pattern design. The disk is suspended from the body by [&hellip;]<\/p>\n","protected":false},"author":290641,"featured_media":7092,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[3074],"class_list":["post-7670","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-types-of-check-valves"],"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/7670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/users\/290641"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/comments?post=7670"}],"version-history":[{"count":2,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/7670\/revisions"}],"predecessor-version":[{"id":7672,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/posts\/7670\/revisions\/7672"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/media\/7092"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/media?parent=7670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/categories?post=7670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/it\/wp-json\/wp\/v2\/tags?post=7670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}