{"id":8931,"date":"2026-06-14T22:41:40","date_gmt":"2026-06-14T14:41:40","guid":{"rendered":"https:\/\/www.stvvalves.com\/?post_type=product&p=8931"},"modified":"2026-06-14T22:50:41","modified_gmt":"2026-06-14T14:50:41","slug":"600lb-lug-check-valve-cf8m-8-inch","status":"publish","type":"product","link":"https:\/\/www.stvvalves.com\/de\/products\/600lb-lug-check-valve-cf8m-8-inch\/","title":{"rendered":"600LB Lug Check Valve, CF8M, 8 Inch"},"content":{"rendered":"

High-Performance Stainless Steel Lug Type Check Valve for Corrosive and High-Pressure Applications<\/h2>\n

The 600LB Lug Check Valve<\/a>, CF8M, 8 Inch<\/strong> is a heavy-duty non-return valve designed to prevent reverse flow in high-pressure industrial piping systems. Manufactured from ASTM A351 CF8M stainless steel<\/strong>, equivalent to cast 316 stainless steel, this valve offers excellent corrosion resistance, high mechanical strength, and long service life in demanding applications involving chemicals, seawater, oil & gas, pharmaceuticals, and industrial process fluids.<\/p>\n

Featuring a robust lug body design<\/strong>, the valve can be installed between flanges with independent bolting on both sides, allowing easier maintenance and line isolation compared to conventional wafer check valves. Designed according to API 594<\/strong>, ASME B16.34<\/strong>, and API 598<\/strong>, the valve<\/a> provides reliable automatic operation without external power or manual intervention.<\/p>\n

\n

Product Overview<\/h2>\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>\nLug Type Check Valve<\/td>\n<\/tr>\n
Valve Type<\/td>\nDual Plate Check Valve<\/td>\n<\/tr>\n
Size<\/td>\n8 Inch (DN200)<\/td>\n<\/tr>\n
Pressure Rating<\/td>\nASME Class 600 LB<\/td>\n<\/tr>\n
Body Material<\/td>\nASTM A351 CF8M<\/td>\n<\/tr>\n
Disc Material<\/td>\nCF8M Stainless Steel<\/td>\n<\/tr>\n
Seat Material<\/td>\nMetal Seat<\/td>\n<\/tr>\n
Spring Material<\/td>\nInconel X-750 \/ SS316<\/td>\n<\/tr>\n
Connection Type<\/td>\nLug Type<\/td>\n<\/tr>\n
Design Standard<\/td>\nAPI 594<\/td>\n<\/tr>\n
Pressure-Temperature Rating<\/td>\nASME B16.34<\/td>\n<\/tr>\n
Face-to-Face<\/td>\nAPI 594<\/td>\n<\/tr>\n
Inspection & Testing<\/td>\nAPI 598<\/td>\n<\/tr>\n
Installation<\/td>\nHorizontal or Vertical<\/td>\n<\/tr>\n
Applicable Media<\/td>\nWater, Oil, Gas, Chemicals, Seawater<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\n

Product Features<\/h1>\n

ASTM A351 CF8M Stainless Steel Construction<\/h2>\n

CF8M is one of the most commonly specified stainless steel materials for industrial valves.<\/p>\n

Advantages<\/h3>\n
    \n
  • Excellent corrosion resistance<\/li>\n
  • Superior chloride resistance<\/li>\n
  • Good high-temperature performance<\/li>\n
  • Long service life<\/li>\n
  • Excellent mechanical strength<\/li>\n<\/ul>\n

    Suitable for:<\/p>\n

      \n
    • Chemical processing<\/li>\n
    • Offshore platforms<\/li>\n
    • Marine applications<\/li>\n
    • Pharmaceutical facilities<\/li>\n
    • Food processing systems<\/li>\n<\/ul>\n
      \n

      Class 600 Pressure Rating<\/h2>\n

      The valve is designed for demanding pressure conditions.<\/p>\n

      Typical Services<\/h3>\n
        \n
      • Refinery process systems<\/li>\n
      • Petrochemical plants<\/li>\n
      • High-pressure water systems<\/li>\n
      • Industrial process piping<\/li>\n
      • Offshore production facilities<\/li>\n<\/ul>\n

        Class 600 valves offer significantly higher pressure capabilities than Class 150 or Class 300 designs.<\/p>\n

        \n

        Lug Body Design<\/h2>\n

        The lug-style body provides several installation advantages.<\/p>\n

        Benefits<\/h3>\n
          \n
        • Independent flange bolting<\/li>\n
        • Easier maintenance<\/li>\n
        • Pipeline section isolation capability<\/li>\n
        • Improved structural support<\/li>\n
        • Enhanced installation flexibility<\/li>\n<\/ul>\n

          Compared to wafer valves, lug valves can often be removed from one side of the pipeline without disturbing the opposite flange connection.<\/p>\n

          \n

          Dual Plate Check Valve Design<\/h2>\n

          The dual-disc mechanism provides:<\/p>\n

            \n
          • Rapid closing action<\/li>\n
          • Reduced water hammer<\/li>\n
          • Lower pressure loss<\/li>\n
          • Compact construction<\/li>\n
          • Improved flow efficiency<\/li>\n<\/ul>\n
            \n

            Technical Specifications<\/h1>\n

            Materials of Construction<\/h2>\n
            \n
            \n\n\n\n\n\n\n\n\n\n\n
            Component<\/th>\nMaterial<\/th>\n<\/tr>\n<\/thead>\n
            Body<\/td>\nASTM A351 CF8M<\/td>\n<\/tr>\n
            Disc<\/td>\nASTM A351 CF8M<\/td>\n<\/tr>\n
            Seat<\/td>\nMetal Seat<\/td>\n<\/tr>\n
            Shaft<\/td>\nSS316<\/td>\n<\/tr>\n
            Spring<\/td>\nInconel X-750<\/td>\n<\/tr>\n
            Retainer<\/td>\nStainless Steel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
            \n

            Design Standards<\/h2>\n
            \n
            \n\n\n\n\n\n\n\n\n\n
            Standard<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
            API 594<\/td>\nCheck Valve Design<\/td>\n<\/tr>\n
            ASME B16.34<\/td>\nPressure-Temperature Ratings<\/td>\n<\/tr>\n
            API 598<\/td>\nInspection & Testing<\/td>\n<\/tr>\n
            MSS SP-25<\/td>\nValve Marking<\/td>\n<\/tr>\n
            NACE MR0175<\/td>\nOptional Compliance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
            \n

            Working Principle<\/h1>\n

            The valve operates automatically using flow pressure.<\/p>\n

            Forward Flow<\/h3>\n
              \n
            1. Fluid enters the valve.<\/li>\n
            2. Dual discs open against spring force.<\/li>\n
            3. Flow passes through the valve.<\/li>\n<\/ol>\n

              Reverse Flow<\/h3>\n
                \n
              1. Flow attempts to reverse direction.<\/li>\n
              2. Spring-assisted discs close immediately.<\/li>\n
              3. Reverse flow is prevented.<\/li>\n
              4. Downstream equipment remains protected.<\/li>\n<\/ol>\n

                The rapid-closing design helps minimize water hammer effects.<\/p>\n

                \n

                Typical Applications<\/h1>\n

                Chemical Processing Plants<\/h2>\n

                CF8M stainless steel provides excellent compatibility with many corrosive chemicals.<\/p>\n

                Applications include:<\/p>\n

                  \n
                • Chemical transfer lines<\/li>\n
                • Solvent systems<\/li>\n
                • Acid handling systems<\/li>\n
                • Utility services<\/li>\n<\/ul>\n

                  Chemical Plant Installation<\/h3>\n
                  \n
                  \n
                  \n
                  \"https:\/\/images.openai.com\/static-rsc-4\/By0lrb_zNSga36J0odf-OPHTQB9LKjdVZqrZQ3u10WAT2air4MHQBGmdHGwP3rZX_WJzxzamvMJEs3AqMdDFOELF9JwgWqLKyCQ_83gFKj0Vsf65jXrMMcKGKssbeUQ8-dRllAsQYt4uQKxdCtiKIviTntYTqWn4NRyR-ur1_XTV3oQeDPvouqCAE0MLVkvx?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                  \n
                  \n
                  \"https:\/\/images.openai.com\/static-rsc-4\/jHCYNc9HJevYONAgnsMpLlBcm7PHXDjM-Slkh-6rVTFIsmMCG1ZOUXAr9IqTwtfm-DDPxTkQL11DYsHpESg3Hygrr1IqkHHU00lILS6756mhQiu0PFXLgk-PTopT_P0r56zV991gqvr2_WOU6NufPkKJ_lRuBp00ZtGYRxtwmGPzIziZ3xQbLjP82EARhpF9?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                  \n
                  \n
                  \"https:\/\/images.openai.com\/static-rsc-4\/XV_OlIghQYaxB7wRNAm0qWQZoUxSRkVG7FnpKfMVZuFUEua-v7emKOKgWAUYdO82_q2DpxfJJP1TAe3j4BOvOSxLAzo60bJrBt4iLCthLvG16C45CgickIMItiSlJoSUx4sWA2e1w6-c1QH8njMwaxgJp5-S0Q2MgxkkdzSdVSGlV3u5mUR7VJbnusT6fM4i?purpose=fullsize\"<\/div>\n
                  \n
                  \n
                  5<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                  \n

                  Offshore and Marine Systems<\/h2>\n

                  The CF8M body offers outstanding corrosion resistance in marine environments.<\/p>\n

                  Used for:<\/p>\n

                    \n
                  • Seawater systems<\/li>\n
                  • Ballast water systems<\/li>\n
                  • Cooling water circuits<\/li>\n
                  • Offshore process systems<\/li>\n<\/ul>\n

                    Marine Application<\/h3>\n
                    \n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/YZk-41h61FMJ3YW0ESfmQVeQCbCjx6M-m-Jd_dYCoCtnrXX2wwJj1U_g4GN_PfU6c2i9MP39q2p3H5eid25x8Osy1Z02UzT-Z7KlizMggi6pKpJ68-J5xLk69FahTj1M-GU0OyxxHgwLtqOSLNovt2rcTKGqnTkvzkrdWebv8bcV_Ox9_a4Q0PlQMwWy09XF?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/01hsalfrnsJz1y_HUXZcQ-bVoKJhGOZizhARk-Ke5n9pDy-sYKjSc1KjDhEeUH9RqZQCH24idCZZVow8DobU2vo0GcqiyRJyx3-wMvJvcnQ2SaNmrh-IrX_CY0yVNzzb-rVZKZsOa_2dvXW4Ygu-X--VX1LoApK2MPlIoc23ZDvBKRVHoPZFQ2Mc-0B_BJNn?purpose=fullsize\"<\/div>\n<\/div>\n<\/div>\n
                    \n
                    \n
                    \"https:\/\/images.openai.com\/static-rsc-4\/-XxgMLff4OnptpjMtH8BUrvENItELVXoGiAw6PCaTGyb2c3jIMLsVdm9k-2q2m-4owesww3e3UhY7j0b7qo8WST2FZG7mOeVBvRtF-FjIabhULvq6iXYqog0jiUt2N7RYfJqHN8GhzMpjZaEYth5jBCUmgS-SthsnVDqT6CzSSp9UQJ9pEA6SRNvWUsOB4yR?purpose=fullsize\"<\/div>\n
                    \n
                    \n
                    5<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                    \n

                    Oil & Gas Industry<\/h2>\n

                    Suitable for:<\/p>\n

                      \n
                    • Process pipelines<\/li>\n
                    • Utility systems<\/li>\n
                    • Water injection systems<\/li>\n
                    • Produced water services<\/li>\n<\/ul>\n
                      \n

                      Water Treatment Facilities<\/h2>\n

                      Commonly installed in:<\/p>\n

                        \n
                      • Pump discharge lines<\/li>\n
                      • Filtration systems<\/li>\n
                      • Distribution networks<\/li>\n
                      • Industrial water services<\/li>\n<\/ul>\n
                        \n

                        Pharmaceutical Industry<\/h2>\n

                        The corrosion-resistant CF8M construction is suitable for:<\/p>\n

                          \n
                        • Process water systems<\/li>\n
                        • Utility piping<\/li>\n
                        • Clean service applications<\/li>\n<\/ul>\n
                          \n

                          Advantages of Lug Check Valves<\/h1>\n
                          \n
                          \n\n\n\n\n\n\n\n\n\n\n
                          Feature<\/th>\nBenefit<\/th>\n<\/tr>\n<\/thead>\n
                          Lug Body Design<\/td>\nEasier maintenance<\/td>\n<\/tr>\n
                          Dual Plate Construction<\/td>\nReduced water hammer<\/td>\n<\/tr>\n
                          Compact Face-to-Face<\/td>\nSpace saving<\/td>\n<\/tr>\n
                          Spring-Assisted Closure<\/td>\nFaster response<\/td>\n<\/tr>\n
                          CF8M Material<\/td>\nCorrosion resistance<\/td>\n<\/tr>\n
                          Class 600 Rating<\/td>\nHigh-pressure service<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                          \n

                          Lug Check Valve vs Wafer Check Valve<\/h1>\n
                          \n
                          \n\n\n\n\n\n\n\n\n\n
                          Feature<\/th>\nLug Type<\/th>\nWafer Type<\/th>\n<\/tr>\n<\/thead>\n
                          Independent Bolting<\/td>\nYes<\/td>\nNo<\/td>\n<\/tr>\n
                          Maintenance Flexibility<\/td>\nBetter<\/td>\nStandard<\/td>\n<\/tr>\n
                          Installation Cost<\/td>\nHigher<\/td>\nLower<\/td>\n<\/tr>\n
                          Structural Strength<\/td>\nHigher<\/td>\nModerate<\/td>\n<\/tr>\n
                          Isolation Capability<\/td>\nBetter<\/td>\nLimited<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                          For critical industrial services, lug-style valves are often preferred due to their maintenance advantages.<\/p>\n

                          \n

                          Quality Assurance<\/h1>\n

                          Each valve undergoes comprehensive testing:<\/p>\n

                          Hydrostatic Shell Test<\/h3>\n

                          Verifies pressure integrity.<\/p>\n

                          Seat Leakage Test<\/h3>\n

                          Confirms sealing performance.<\/p>\n

                          PMI Testing<\/h3>\n

                          Available upon request.<\/p>\n

                          Dimensional Inspection<\/h3>\n

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

                          Functional Operation Testing<\/h3>\n

                          Validates opening and closing performance.<\/p>\n

                          \n

                          Optional Features<\/h1>\n

                          Seat Options<\/h2>\n
                            \n
                          • Metal Seat<\/li>\n
                          • PTFE Seat<\/li>\n
                          • RPTFE Seat<\/li>\n<\/ul>\n
                            \n

                            Spring Materials<\/h2>\n
                              \n
                            • Inconel X-750<\/li>\n
                            • Hastelloy C276<\/li>\n
                            • SS316<\/li>\n<\/ul>\n
                              \n

                              Certifications<\/h2>\n
                                \n
                              • EN 10204 3.1<\/li>\n
                              • NACE MR0175<\/li>\n
                              • API Compliance<\/li>\n
                              • Third-Party Inspection<\/li>\n<\/ul>\n
                                \n

                                Frequently Asked Questions<\/h1>\n

                                What is CF8M?<\/h3>\n

                                CF8M is the cast equivalent of 316 stainless steel, offering excellent corrosion resistance and durability.<\/p>\n

                                Why choose a lug check valve?<\/h3>\n

                                Lug designs allow independent bolting and easier maintenance compared to wafer designs.<\/p>\n

                                Can this valve be installed vertically?<\/h3>\n

                                Yes, provided the flow direction is upward and installation follows manufacturer guidelines.<\/p>\n

                                Is CF8M suitable for seawater?<\/h3>\n

                                For many seawater applications, CF8M performs well, although duplex stainless steel or nickel aluminum bronze may be preferred for severe marine environments.<\/p>\n

                                What industries commonly use Class 600 lug check valves?<\/h3>\n

                                Oil & gas, chemical processing, marine, offshore, water treatment, and pharmaceutical industries.<\/p>\n

                                \n

                                Request a Quote<\/h1>\n

                                China CF8M Lug Check Valve Manufacturer<\/h2>\n

                                We provide:<\/p>\n

                                \u2705 API 594 Compliant Manufacturing
                                \u2705 Stainless Steel Valve Expertise
                                \u2705 Class 600 High-Pressure Solutions
                                \u2705 OEM & Custom Engineering Support
                                \u2705 Third-Party Inspection Available
                                \u2705 Global Export Experience<\/p>\n

                                Please provide:<\/p>\n

                                  \n
                                • Valve Size (8 Inch \/ DN200)<\/li>\n
                                • Pressure Rating (Class 600)<\/li>\n
                                • Media Type<\/li>\n
                                • Operating Temperature<\/li>\n
                                • Quantity Required<\/li>\n
                                • Special Material Requirements<\/li>\n<\/ul>\n

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

                                   <\/p>\n","protected":false},"excerpt":{"rendered":"

                                  STV Valve Technology Group Co., Ltd is a professional leader China 600LB Lug Check Valve, CF8M Check Valve, 8 Inch Check Valve, Stainless Steel Check Valve, Lug Type Check Valve, API 594 Check Valve, Dual Plate Check Valve, High Pressure Check Valve, Industrial Check Valve Manufacturer, China Check Valve Supplier, Class 600 Check Valve, Non Return Valve CF8M With High Quality And Low Price.<\/p>","protected":false},"featured_media":8932,"template":"","meta":[],"product_brand":[],"product_cat":[46,84],"product_tag":[3173,4142,1650,4141,4145,4146,497,213,4144,4143,4147,633],"class_list":{"0":"post-8931","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-check-valves","7":"product_cat-wafer-check-valve","8":"product_tag-600lb-lug-check-valve","9":"product_tag-8-inch-check-valve","10":"product_tag-api-594-check-valve","11":"product_tag-cf8m-check-valve","12":"product_tag-china-check-valve-supplier","13":"product_tag-class-600-check-valve","14":"product_tag-dual-plate-check-valve","15":"product_tag-high-pressure-check-valve","16":"product_tag-industrial-check-valve-manufacturer","17":"product_tag-lug-type-check-valve","18":"product_tag-non-return-valve-cf8m","19":"product_tag-stainless-steel-check-valve","21":"first","22":"instock","23":"shipping-taxable","24":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/product\/8931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/media\/8932"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/media?parent=8931"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/product_brand?post=8931"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/product_cat?post=8931"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/de\/wp-json\/wp\/v2\/product_tag?post=8931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}