{"id":8574,"date":"2025-10-31T11:28:11","date_gmt":"2025-10-31T03:28:11","guid":{"rendered":"https:\/\/www.stvvalves.com\/?post_type=product&p=8574"},"modified":"2026-06-09T12:33:31","modified_gmt":"2026-06-09T04:33:31","slug":"900lb-swing-check-valve-14-inch-a216-wcb-api-6d-psb-bw","status":"publish","type":"product","link":"https:\/\/www.stvvalves.com\/ar\/products\/900lb-swing-check-valve-14-inch-a216-wcb-api-6d-psb-bw\/","title":{"rendered":"900LB Swing Check Valve,14 Inch,A216 WCB, API 6D, PSB, BW"},"content":{"rendered":"

900LB Swing Check Valve, 14 Inch, ASTM A216 WCB, API 6D, Pressure Seal Bonnet, Butt Weld Ends<\/h1>\n

API 6D Pressure Seal Bonnet Swing Check Valve for High-Pressure Pipeline Applications<\/h2>\n

The 14 Inch Class 900 Swing Check Valve<\/strong> is a premium heavy-duty non-return valve engineered for demanding oil & gas, refinery, petrochemical, offshore, LNG, and power generation applications. Manufactured from ASTM A216 WCB carbon steel<\/strong>, this valve complies with the stringent requirements of API 6D<\/span><\/span> and ASME B16.34<\/span><\/span>, ensuring reliable operation under high-pressure and high-temperature conditions.<\/p>\n

Featuring a Pressure Seal Bonnet (PSB)<\/strong> design and Butt Weld (BW) ends<\/strong>, the valve is specifically developed for critical pipeline systems where leakage prevention, operational safety, and long-term durability are essential. The swing disc mechanism automatically prevents reverse flow, protecting expensive equipment such as pumps, compressors, turbines, and process systems.<\/p>\n

With its robust construction and low-pressure-loss design, this valve is widely selected for Class 900 pipeline systems across the global energy industry.<\/p>\n

\n

Product Overview<\/h1>\n

Product Description<\/h3>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Product Name<\/td>\nSwing Check Valve<\/td>\n<\/tr>\n
Valve Type<\/td>\nSwing Type Non-Return Valve<\/td>\n<\/tr>\n
Size<\/td>\n14 Inch (DN350)<\/td>\n<\/tr>\n
Pressure Rating<\/td>\nASME Class 900<\/td>\n<\/tr>\n
Design Standard<\/td>\nAPI 6D<\/td>\n<\/tr>\n
Pressure-Temperature Standard<\/td>\nASME B16.34<\/td>\n<\/tr>\n
Face-to-Face<\/td>\nASME B16.10<\/td>\n<\/tr>\n
Body Material<\/td>\nASTM A216 WCB<\/td>\n<\/tr>\n
Bonnet Type<\/td>\nPressure Seal Bonnet<\/td>\n<\/tr>\n
End Connection<\/td>\nButt Weld (BW)<\/td>\n<\/tr>\n
Inspection Standard<\/td>\nAPI 598<\/td>\n<\/tr>\n
Fire Safe Design<\/td>\nAvailable<\/td>\n<\/tr>\n
NACE Compliance<\/td>\nAvailable<\/td>\n<\/tr>\n
Operation<\/td>\nAutomatic<\/td>\n<\/tr>\n
Flow Direction<\/td>\nOne Direction<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Why Choose a Pressure Seal Bonnet Swing Check Valve?<\/h1>\n

In high-pressure applications, traditional bolted bonnet designs can become vulnerable to gasket stress and leakage risks.<\/p>\n

The Pressure Seal Bonnet (PSB)<\/strong> design utilizes internal line pressure to increase sealing force automatically.<\/p>\n

Key Benefits<\/h3>\n

\u2714 Enhanced bonnet sealing integrity<\/p>\n

\u2714 Reduced maintenance requirements<\/p>\n

\u2714 Improved safety in critical service<\/p>\n

\u2714 Better performance under thermal cycling<\/p>\n

\u2714 Longer service life<\/p>\n

\u2714 Preferred design for Class 600 and above<\/p>\n

As system pressure increases, the bonnet seal becomes tighter, making PSB valves ideal for severe operating environments.<\/p>\n

\n

Features & Benefits<\/h1>\n

Full-Port Flow Design<\/h2>\n

The swing disc opens fully during operation, creating an unobstructed flow path.<\/p>\n

Advantages include:<\/p>\n

    \n
  • Minimal pressure loss<\/li>\n
  • Reduced turbulence<\/li>\n
  • Improved flow efficiency<\/li>\n
  • Lower energy consumption<\/li>\n<\/ul>\n
    \n

    Heavy-Duty Swing Disc Assembly<\/h2>\n

    The disc is precisely machined and balanced to ensure:<\/p>\n

      \n
    • Smooth operation<\/li>\n
    • Rapid closure<\/li>\n
    • Reliable sealing<\/li>\n
    • Reduced wear<\/li>\n<\/ul>\n
      \n

      Butt Weld End Connections<\/h2>\n

      BW ends provide a permanent welded connection with significant advantages:<\/p>\n

      Superior Structural Integrity<\/h3>\n

      Eliminates flange leakage concerns.<\/p>\n

      Reduced Maintenance<\/h3>\n

      No gasket replacement required.<\/p>\n

      Improved Safety<\/h3>\n

      Ideal for high-pressure and high-temperature services.<\/p>\n

      Better Vibration Resistance<\/h3>\n

      Especially suitable for compressor and pump discharge systems.<\/p>\n

      \n

      ASTM A216 WCB Carbon Steel Construction<\/h2>\n

      WCB remains the industry’s most widely used carbon steel casting material.<\/p>\n

      Benefits include:<\/p>\n

        \n
      • Excellent weldability<\/li>\n
      • High strength<\/li>\n
      • Good toughness<\/li>\n
      • Cost-effective performance<\/li>\n
      • Suitable for steam, oil, gas, and water service<\/li>\n<\/ul>\n
        \n

        Technical Design Standards<\/h1>\n
        \n
        \n\n\n\n\n\n\n\n\n\n\n\n
        Standard<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
        API 6D<\/td>\nPipeline Valves<\/td>\n<\/tr>\n
        ASME B16.34<\/td>\nValve Design<\/td>\n<\/tr>\n
        ASME B16.10<\/td>\nFace-to-Face Dimensions<\/td>\n<\/tr>\n
        ASME B16.25<\/td>\nButt Weld Ends<\/td>\n<\/tr>\n
        API 598<\/td>\nInspection & Testing<\/td>\n<\/tr>\n
        MSS SP-55<\/td>\nCasting Quality<\/td>\n<\/tr>\n
        NACE MR0175<\/td>\nSour Service Option<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
        \n

        Available Material Options<\/h1>\n

        While this model is supplied in ASTM A216 WCB, other materials are available.<\/p>\n

        \n
        \n\n\n\n\n\n\n\n\n\n\n\n\n
        Body Material<\/th>\nApplication<\/th>\n<\/tr>\n<\/thead>\n
        ASTM A216 WCB<\/td>\nGeneral Oil & Gas<\/td>\n<\/tr>\n
        ASTM A352 LCB<\/td>\nLow Temperature Service<\/td>\n<\/tr>\n
        ASTM A217 WC6<\/td>\nHigh Temperature Steam<\/td>\n<\/tr>\n
        ASTM A217 WC9<\/td>\nElevated Temperature Applications<\/td>\n<\/tr>\n
        ASTM A351 CF8<\/td>\nCorrosion Resistant Service<\/td>\n<\/tr>\n
        ASTM A351 CF8M<\/td>\nChemical Processing<\/td>\n<\/tr>\n
        Duplex Stainless Steel<\/td>\nSeawater Applications<\/td>\n<\/tr>\n
        Super Duplex Stainless Steel<\/td>\nOffshore & Desalination<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
        \n

        Working Principle<\/h1>\n
        \n
        \n
        \n
        \"https:\/\/images.openai.com\/static-rsc-4\/BS1Ar7mMuSmNltGaV2aB84EnzFVmyeijOVIGG84oq8VERdji2vPrSaDcgYP2Iwpalq7vbZ1bq8UcrB9BRl3TLUbWINaVo72I9TyrJQSgXgy2wXqmVOhcjyHJBuxHASQHqYx_tq5OEWF93_C1cGIqHVsu1maWvhcRp8uRNoifNwLBnwynJsbiJ4zg0Y7eGl-d?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
        \n
        \n
        \"https:\/\/images.openai.com\/static-rsc-4\/aHMgb2VIzTjTL-bS-A3w0eFfb2AyTSZmBozg2gKFF3-5J7ecoAOgdQbYWohSJZNAPS_0hUaPyYD2Go-w0eUe1WtF2m0E4Uh3ornjgWU4dro848iYjjuRRggx3T-bs0YEDtfQAdORBddi7TxhSN_SQySDojxn4aNboPXjGfBqQxkLYlLgok_15tm3iXrm3Uyl?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
        \n
        \n
        \"https:\/\/images.openai.com\/static-rsc-4\/1YfbvaaYWQqH8wUQL3MJVN2ODkXOqCxl7AIurYXLAvKc6CFZtCOI1ocMa-BMrHHGxzd-cnzptGYN38FmVb9_CyJ8v0gIhKYuxkMCLUX8NUtVU6IDAKA0nVxS4lp-A3za0LcJ6z9dL16b3IwXxOOOzU5TLwrKgEzPtj_HF84UbWtMc5HqnXfq7QT3_dce1pYe?purpose=fullsize\"<\/div>\n
        \n
        \n
        6<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

        The swing check valve operates automatically without external power.<\/p>\n

        During Forward Flow<\/h3>\n
          \n
        1. Fluid pressure enters the valve.<\/li>\n
        2. Disc swings open.<\/li>\n
        3. Flow passes with minimal resistance.<\/li>\n<\/ol>\n

          During Reverse Flow<\/h3>\n
            \n
          1. Flow slows or reverses.<\/li>\n
          2. Gravity and reverse pressure move the disc.<\/li>\n
          3. Disc contacts the seat.<\/li>\n
          4. Reverse flow is immediately blocked.<\/li>\n<\/ol>\n

            This protects upstream equipment from damage caused by backflow.<\/p>\n

            \n

            Applications<\/h1>\n

            Oil & Gas Transmission Pipelines<\/h2>\n

            Widely used in:<\/p>\n

              \n
            • Crude oil pipelines<\/li>\n
            • Natural gas transmission systems<\/li>\n
            • Compressor stations<\/li>\n
            • Gathering systems<\/li>\n<\/ul>\n
              \n

              Refineries<\/h2>\n

              Installed in:<\/p>\n

                \n
              • Process units<\/li>\n
              • Utility systems<\/li>\n
              • Distillation facilities<\/li>\n
              • Hydrocarbon transfer lines<\/li>\n<\/ul>\n
                \n

                Petrochemical Plants<\/h2>\n

                Suitable for:<\/p>\n

                  \n
                • Feedstock systems<\/li>\n
                • Process piping<\/li>\n
                • Utility networks<\/li>\n
                • Chemical processing lines<\/li>\n<\/ul>\n
                  \n

                  LNG Facilities<\/h2>\n

                  Used in:<\/p>\n

                    \n
                  • Liquefaction plants<\/li>\n
                  • LNG terminals<\/li>\n
                  • Storage facilities<\/li>\n
                  • Process transfer systems<\/li>\n<\/ul>\n
                    \n

                    Offshore Platforms<\/h2>\n
                    \n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/1NAkdU34OWWdNVHXF5_e8zrAc39fLAkDkrDSygd-XtCjAMnzVMpfAZc-EEgHcA20Yz363l9zYUyiHICt8QEtc0iT-_nH7Pia-G1DM8-dteFT09C0OX1xAYJKH641aVupfqLus1UrGgfK1KRwTa8SqnUAW-q4Ml3UpxFYA10CWyXG8BTOsCGRybWNnfuufjf1?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/GK8bv3eqLdFqPzG-wr67CNkDaNCFd0Vfg7pXk3094Wn9-UnCs1TmQd1OL2nezHHbDLB6SDZ7a6Z0-Tcp9JGDtRi2xYw6BLExGaXbEI7vRh9hZ5TOHZzPayQ4eZlsPLBO-nh5hDOc_dBFHGrKZOnZ_Bd0Pr1pkz3amOuttbz9pWkW3YQeUNx4Aev_Z65jvm5t?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/ETkhYbBSVCsNQvRkVAu6U9MtIXoQ6i03lnrUO9xiWJQevCqmLO-GHCgw4dHiZ58zZbagPEQUBmo1cB1YSp3SSiFTJxHnQGZJPfCJg7iCQQjhD-jb-T8Ahs_t9SdMJfutRfubs_rDCovff4oF8zrG7dQivK7YzksrCtOct4QlvcRWFzW0dd54ZO8iI3rasIRn?purpose=fullsize\"<\/div>\n
                    \n
                    \n
                    6<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

                    Commonly installed in:<\/p>\n

                      \n
                    • Production facilities<\/li>\n
                    • Utility systems<\/li>\n
                    • Export pipelines<\/li>\n
                    • Water injection systems<\/li>\n<\/ul>\n
                      \n

                      Power Generation<\/h2>\n

                      Suitable for:<\/p>\n

                        \n
                      • Main steam systems<\/li>\n
                      • Feedwater systems<\/li>\n
                      • Turbine auxiliary piping<\/li>\n
                      • High-pressure utility services<\/li>\n<\/ul>\n
                        \n

                        Quality Assurance<\/h1>\n

                        Every valve undergoes comprehensive inspection and testing.<\/p>\n

                        Standard Testing Procedures<\/h2>\n

                        Hydrostatic Shell Test<\/h3>\n

                        Verifies body integrity under pressure.<\/p>\n

                        High-Pressure Seat Test<\/h3>\n

                        Confirms sealing performance.<\/p>\n

                        Backflow Simulation Test<\/h3>\n

                        Validates disc closure performance.<\/p>\n

                        Material PMI Verification<\/h3>\n

                        Confirms alloy chemistry.<\/p>\n

                        Dimensional Inspection<\/h3>\n

                        Ensures compliance with design standards.<\/p>\n

                        Visual Examination<\/h3>\n

                        Checks casting quality and machining accuracy.<\/p>\n

                        Testing is performed according to:<\/p>\n

                          \n
                        • API 598<\/span><\/span><\/li>\n
                        • API 6D<\/span><\/span><\/li>\n<\/ul>\n
                          \n

                          Optional Features<\/h1>\n

                          Trim Options<\/h2>\n
                            \n
                          • API Trim 1<\/li>\n
                          • API Trim 5<\/li>\n
                          • API Trim 8<\/li>\n
                          • API Trim 10<\/li>\n
                          • Stellite Hardfaced Seats<\/li>\n<\/ul>\n
                            \n

                            Special Service Options<\/h2>\n

                            NACE MR0175<\/h3>\n

                            For sour gas and H\u2082S environments.<\/p>\n

                            Fire Safe Design<\/h3>\n

                            For refinery and offshore installations.<\/p>\n

                            Low Emission Service<\/h3>\n

                            For environmentally sensitive applications.<\/p>\n

                            High Temperature Service<\/h3>\n

                            Custom trim selections available.<\/p>\n

                            \n

                            Documentation Available<\/h1>\n

                            We can supply:<\/p>\n

                            \u2705 Product Datasheet<\/p>\n

                            \u2705 General Arrangement Drawing<\/p>\n

                            \u2705 Material Test Certificate (EN 10204 3.1)<\/p>\n

                            \u2705 Hydrostatic Test Certificate<\/p>\n

                            \u2705 Welding Procedure Qualification Records (WPS\/PQR)<\/p>\n

                            \u2705 NDT Reports<\/p>\n

                            \u2705 Inspection Release Notes<\/p>\n

                            \u2705 Installation & Maintenance Manual<\/p>\n

                            \n

                            Frequently Asked Questions<\/h1>\n

                            What is a swing check valve?<\/h2>\n

                            A swing check valve is an automatic non-return valve that prevents reverse flow by using a hinged disc that opens and closes based on flow direction.<\/p>\n

                            \n

                            Why choose API 6D check valves?<\/h2>\n

                            API 6D valves are specifically designed for pipeline applications and provide enhanced reliability, safety, and testing requirements.<\/p>\n

                            \n

                            What are the benefits of a Pressure Seal Bonnet?<\/h2>\n

                            Pressure Seal Bonnet designs provide superior sealing performance in Class 600 and higher pressure systems.<\/p>\n

                            \n

                            Why use BW ends instead of flanges?<\/h2>\n

                            Butt Weld connections offer:<\/p>\n

                              \n
                            • Leak-free operation<\/li>\n
                            • Better structural strength<\/li>\n
                            • Reduced maintenance<\/li>\n
                            • Improved performance under vibration<\/li>\n<\/ul>\n
                              \n

                              Is WCB suitable for high-pressure service?<\/h2>\n

                              Yes. ASTM A216 WCB is widely used in Class 900 oil & gas, refinery, and power plant applications.<\/p>\n

                              \n

                              Can this valve be supplied with NACE compliance?<\/h2>\n

                              Yes. Full NACE MR0175 compliance can be provided upon request.<\/p>\n

                              \n

                              Related Products<\/h1>\n
                                \n
                              • API 6D Gate Valve<\/li>\n
                              • API 6D Trunnion Ball Valve<\/li>\n
                              • Tilting Disc Check Valve<\/li>\n
                              • Axial Flow Check Valve<\/li>\n
                              • Pressure Seal Gate Valve<\/li>\n
                              • Pressure Seal Globe Valve<\/li>\n
                              • High Pressure Forged Check Valve<\/li>\n<\/ul>\n
                                \n

                                Request a Quote<\/h1>\n

                                Trusted China API 6D Swing Check Valve Manufacturer<\/h2>\n

                                We offer:<\/p>\n

                                \u2705 Factory Direct Pricing<\/p>\n

                                \u2705 Large Diameter Valve Manufacturing<\/p>\n

                                \u2705 API 6D Certified Production<\/p>\n

                                \u2705 Fast Delivery Schedules<\/p>\n

                                \u2705 Third-Party Inspection Support<\/p>\n

                                \u2705 OEM & Private Label Solutions<\/p>\n

                                \u2705 Worldwide Export Experience<\/p>\n

                                Send Your RFQ Today<\/h3>\n

                                Please provide:<\/p>\n

                                  \n
                                • Valve Size (14″ \/ DN350)<\/li>\n
                                • Pressure Rating (Class 900)<\/li>\n
                                • Trim Requirements<\/li>\n
                                • Operating Temperature<\/li>\n
                                • Media Type<\/li>\n
                                • Quantity Required<\/li>\n<\/ul>\n

                                  Our technical sales team will provide a detailed quotation, datasheet, GA drawing, and production schedule within 24 hours.<\/p>\n

                                  SEO Keywords:<\/strong> 900LB Swing Check Valve, API 6D Swing Check Valve, 14 Inch Check Valve, Pressure Seal Bonnet Check Valve, WCB Swing Check Valve, BW End Check Valve, Class 900 Pipeline Check Valve, High Pressure Non Return Valve, Oil Gas Check Valve Manufacturer, China API 6D Valve Supplier.<\/p>\n

                                  \n","protected":false},"excerpt":{"rendered":"

                                  STV Valve Technology Group Co., Ltd specializes in the 900 lb swing check valve, including the ANSI Class 900 Swing Check Valve, API 6D Swing Check Valve, and A216 WCB Swing Check Valvemodels. Our range features high-quality options such as the industrial swing check valve, carbon steel swing check valve, and pressure seal variants.<\/p>","protected":false},"featured_media":8575,"template":"","meta":[],"product_brand":[],"product_cat":[46,83],"product_tag":[3778,2670,2384,1034,2386,2383,300,2382,2385,486,2387],"class_list":{"0":"post-8574","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-check-valves","7":"product_cat-cast-steel-check-valve","8":"product_tag-14-inch-900lb-swing-check-valve","9":"product_tag-900lb-swing-check-valve","10":"product_tag-a216-wcb-swing-check-valve","11":"product_tag-api-6d-swing-check-valve","12":"product_tag-bw-swing-check-valve","13":"product_tag-carbon-steel-swing-check-valve","14":"product_tag-high-pressure-swing-check-valve","15":"product_tag-industrial-swing-check-valve","16":"product_tag-nace-mr0175-swing-check-valve","17":"product_tag-pressure-seal-swing-check-valve","18":"product_tag-self-sealing-cast-steel-swing-check-manufacturer","20":"first","21":"instock","22":"shipping-taxable","23":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/product\/8574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/media\/8575"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/media?parent=8574"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/product_brand?post=8574"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/product_cat?post=8574"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ar\/wp-json\/wp\/v2\/product_tag?post=8574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}