{"id":1942,"date":"2026-08-11T12:41:38","date_gmt":"2026-08-11T12:41:38","guid":{"rendered":"https:\/\/www.valvefac.com\/?post_type=product&p=1942"},"modified":"2026-08-12T12:21:31","modified_gmt":"2026-08-12T12:21:31","slug":"swing-check-valve","status":"publish","type":"product","link":"https:\/\/www.valvefac.com\/index.php\/product\/swing-check-valve\/","title":{"rendered":"Swing Check Valve Threaded & Flanged for Industrial Pipeline System"},"content":{"rendered":"
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Swing Check Valve<\/h2>\n

Specification<\/h2>\n<\/div>\n<\/div>\n
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I. Important Attribute and Specification Description<\/h2>\n<\/div>\n
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A. Global Standard Compliance & Product Core Definition<\/h3>\n<\/div>\n
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The VALVEFAC\u00a0Swing Check Valve<\/strong>\u00a0is a bolted bonnet swing-type non-return valve fully engineered in accordance with internationally recognized industrial valve standards including\u00a0API 594<\/strong>,\u00a0ASME B16.34<\/strong>,\u00a0ASME B16.5<\/strong>,\u00a0ASME B16.10<\/strong>, and EU CE safety certification, delivering reliable one-way flow isolation and medium backflow prevention for general industrial, petrochemical, power and municipal piping systems. This valve adopts classic swing disc internal structure, with the disc hinged on an internal pivot shaft to freely swing open under forward medium flow pressure and tightly attach to valve seat to cut off reverse fluid flow once pipeline pressure reverses. The product is equipped with standard raised face flanged end connections and bolted top cover sealed by flexible graphite composite gasket, without auxiliary spring components, which greatly reduces fluid flow resistance during normal pipeline operation. All dimensional indexes follow unified ASME dimensional specifications to realize full interchangeability with global standard pipeline flanges, which simplifies on-site installation, regular maintenance and spare parts replacement for EPC contractors and plant operation departments. All finished products pass API 598 standardized hydrostatic and air tightness testing before delivery, satisfying market access audit requirements for North America, European Union, Middle East and Southeast Asia industrial engineering projects.<\/div>\n<\/div>\n
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B. Quantified Complete Technical Performance Parameters<\/h3>\n<\/div>\n
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Parameter Category<\/th>\nStandardized Performance Index<\/th>\n<\/tr>\n<\/thead>\n
Nominal Pipe Size<\/td>\n3 Inch (DN80)<\/td>\n<\/tr>\n
Pressure Class Rating<\/td>\nClass 150LB as per ASME B16.34 pressure grade standard<\/td>\n<\/tr>\n
Main Valve Body Material<\/td>\nASTM A216 WCB Cast Carbon Steel<\/td>\n<\/tr>\n
Cover Gasket & Sealing Packing<\/td>\nFlexible Graphite Spiral Wound Composite Gasket<\/td>\n<\/tr>\n
End Connection Type<\/td>\nRF Raised Face Flanged Connection matching ASME B16.5 bolt layout<\/td>\n<\/tr>\n
Internal Swing Disc Material<\/td>\nASTM A105 Carbon Steel with 13Cr Hardfaced Sealing Surface<\/td>\n<\/tr>\n
Pivot Shaft Material<\/td>\nASTM A182 F6a Martensitic Stainless Steel<\/td>\n<\/tr>\n
Applicable Working Temperature Range<\/td>\n-29\u00b0C ~ +425\u00b0C adapting steam, hot oil and normal temperature liquid medium<\/td>\n<\/tr>\n
Shell Hydrostatic Test Pressure<\/td>\n1.5 times of Class 150LB rated working pressure regulated by API 598<\/td>\n<\/tr>\n
Seat Tightness Test Pressure<\/td>\n1.1 times of nominal working pressure with ANSI B16.104 Class VI zero bubble leakage<\/td>\n<\/tr>\n
Standard Face-to-Face Length<\/td>\nFixed dimension following ASME B16.10 swing check valve dimensional standard<\/td>\n<\/tr>\n
Flow Resistance Coefficient<\/td>\nLow drag coefficient without spring blocking inside flow channel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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The\u00a0ASTM A216 WCB cast carbon steel valve body<\/strong>\u00a0is processed through standardized normalizing heat treatment, with minimum tensile strength reaching 485MPa and minimum yield strength hitting 240MPa, possessing excellent impact resistance and structural stability under alternating temperature and pressure working conditions, widely compatible with steam, industrial water, crude oil, natural gas and most neutral non-corrosive industrial fluids. The internal swing disc is hardfaced with 13Cr alloy on the sealing contact surface after precision machining and lapping, forming rigid metal-to-metal sealing pair with valve body seat, which maintains stable tight shut-off performance under high temperature medium erosion without aging deformation like soft rubber sealing materials. The pivot shaft adopts quenched and tempered F6a stainless steel raw material, effectively resisting medium corrosion and galling abrasion during long-term reciprocating swing movement, avoiding disc jamming failure caused by shaft rusting. The bolted top cover is matched with flexible graphite spiral wound gasket as static sealing component, the layered graphite composite structure retains stable sealing performance under high temperature fluctuation, effectively blocking medium leakage at the body-cover joint. The flanged raised face connection surface is machined with serrated anti-slip texture, which increases gasket attaching friction and prevents medium seepage under pipeline pressure fluctuation. The valve body internal flow channel adopts streamlined casting design to reduce medium turbulence and pressure loss during forward circulation, which optimizes overall pipeline transmission efficiency compared with lift-type check valve products with narrow flow passage.<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
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Swing Check Valve is full-bore swing-type automatic non-return valve designed for pipeline medium anti-backflow protection.<\/div>\n<\/div>\n
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  • Body material: high-quality cast iron \/ stainless steel optional<\/li>\n
  • End connection: Threaded \/ Flanged optional<\/li>\n
  • Pressure rating: PN10\u2011PN16 \/ Class150<\/li>\n
  • Unique swing disc design with full straight flow channel, ultra-low flow resistance<\/li>\n
  • Automatic operation driven by medium pressure, no manual intervention required<\/li>\n
  • Large flow area, no blockage during medium circulation<\/li>\n
  • Reliable gravity and back-pressure closing, effective anti-backflow performance<\/li>\n
  • Wear-resistant sealing surface, stable bidirectional sealing effect<\/li>\n
  • Rugged integral casting structure, impact-resistant and durable<\/li>\n
  • Suitable for high-flow pipeline working conditions<\/li>\n
  • Simple structure, low failure rate and convenient daily maintenance<\/li>\n
  • OEM support for size, material and standard customization<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"featured_media":1943,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[27],"product_tag":[],"class_list":{"0":"post-1942","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-check-valve","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product\/1942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/comments?post=1942"}],"version-history":[{"count":4,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product\/1942\/revisions"}],"predecessor-version":[{"id":2026,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product\/1942\/revisions\/2026"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/media\/1943"}],"wp:attachment":[{"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/media?parent=1942"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=1942"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=1942"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valvefac.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=1942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}