{"id":6856,"date":"2023-07-25T12:15:47","date_gmt":"2023-07-25T04:15:47","guid":{"rendered":"https:\/\/www.stvvalves.com\/?post_type=product&p=6856"},"modified":"2026-06-09T21:11:38","modified_gmt":"2026-06-09T13:11:38","slug":"triple-eccentric-butterfly-valve-a216-wcb-28-inch-300-lb-rf","status":"publish","type":"product","link":"https:\/\/www.stvvalves.com\/ru\/products\/triple-eccentric-butterfly-valve-a216-wcb-28-inch-300-lb-rf\/","title":{"rendered":"\u0422\u0440\u043e\u0439\u043d\u043e\u0439 \u044d\u043a\u0441\u0446\u0435\u043d\u0442\u0440\u0438\u043a\u043e\u0432\u044b\u0439 \u0434\u0440\u043e\u0441\u0441\u0435\u043b\u044c\u043d\u044b\u0439 \u043a\u043b\u0430\u043f\u0430\u043d, A216 WCB, 28 \u0434\u044e\u0439\u043c\u043e\u0432, 300 \u0444\u0443\u043d\u0442\u043e\u0432, RF"},"content":{"rendered":"

Triple Eccentric Butterfly Valve, ASTM A216 WCB, 28 Inch, Class 300 LB, RF End<\/h1>\n

28 Inch Class 300 Triple Offset Butterfly Valve for High-Temperature and Critical Isolation Service<\/h2>\n

The Triple Eccentric \u0414\u0432\u0443\u0441\u0442\u0432\u043e\u0440\u0447\u0430\u0442\u044b\u0439 \u043a\u043b\u0430\u043f\u0430\u043d<\/a> (Triple Offset Butterfly Valve), 28 Inch, Class 300 LB, RF End<\/strong>, is engineered for demanding industrial applications requiring zero leakage performance, high-temperature resistance, and long service life. Manufactured from ASTM A216 WCB carbon steel<\/strong>, this valve incorporates an advanced triple offset sealing geometry<\/strong> that eliminates seat friction during operation, significantly reducing wear and extending operational reliability.<\/p>\n

Designed in accordance with API 609<\/strong>, \u0410\u0421\u041c\u042d \u041116.34<\/strong>, and related international standards, this valve is widely used in oil & gas, petrochemical, power generation, LNG, refinery, and industrial process systems where conventional resilient-seated valves cannot meet operating requirements.<\/p>\n

The metal-to-metal sealing design delivers exceptional performance in high-pressure and high-temperature environments while maintaining low operating torque and tight shutoff capabilities.<\/p>\n

\n

Product Overview<\/h1>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\n\u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n<\/tr>\n<\/thead>\n
\u043d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0442\u043e\u0432\u0430\u0440\u0430<\/td>\n\u0422\u0440\u043e\u0439\u043d\u043e\u0439 \u044d\u043a\u0441\u0446\u0435\u043d\u0442\u0440\u0438\u043a\u043e\u0432\u044b\u0439 \u043a\u043b\u0430\u043f\u0430\u043d-\u0431\u0430\u0431\u043e\u0447\u043a\u0430<\/td>\n<\/tr>\n
\u0422\u0438\u043f \u043a\u043b\u0430\u043f\u0430\u043d\u0430<\/td>\nTriple Offset Butterfly Valve<\/td>\n<\/tr>\n
\u0420\u0430\u0437\u043c\u0435\u0440<\/td>\n28 Inch (DN700)<\/td>\n<\/tr>\n
Pressure Rating<\/td>\nASME Class 300<\/td>\n<\/tr>\n
Body Material<\/td>\nASTM A216 WCB<\/td>\n<\/tr>\n
Disc Material<\/td>\nStainless Steel \/ WCB<\/td>\n<\/tr>\n
Seat Type<\/td>\nMetal Seat<\/td>\n<\/tr>\n
\u041a\u043e\u043d\u0446\u0435\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435<\/td>\nRaised Face Flanged (RF)<\/td>\n<\/tr>\n
\u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0434\u0438\u0437\u0430\u0439\u043d\u0430<\/td>\nAPI 609<\/td>\n<\/tr>\n
Pressure-Temperature Standard<\/td>\n\u0410\u0421\u041c\u042d \u041116.34<\/td>\n<\/tr>\n
Face-to-Face<\/td>\nAPI 609<\/td>\n<\/tr>\n
Flange Standard<\/td>\nASME B16.5<\/td>\n<\/tr>\n
Inspection & Testing<\/td>\nAPI 598<\/td>\n<\/tr>\n
Leakage Standard<\/td>\nISO 5208 Rate A<\/td>\n<\/tr>\n
\u041f\u043e\u0436\u0430\u0440\u043e\u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u0430\u044f \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f<\/td>\nAvailable<\/td>\n<\/tr>\n
\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u044f<\/td>\nGear, Electric, Pneumatic, Hydraulic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

What Is a Triple Eccentric Butterfly Valve?<\/h1>\n

A Triple Eccentric Butterfly Valve utilizes three offsets to eliminate friction between the disc sealing surface and seat during opening and closing operations.<\/p>\n

First Offset<\/h3>\n

The shaft centerline is positioned behind the seat centerline.<\/p>\n

Second Offset<\/h3>\n

The shaft centerline is offset from the pipeline centerline.<\/p>\n

Third Offset<\/h3>\n

The sealing surface is machined into a conical geometry, creating a cam-like sealing action.<\/p>\n

Benefits of Triple Offset Design<\/h3>\n
    \n
  • Zero friction during operation<\/li>\n
  • Longer seat life<\/li>\n
  • Lower operating torque<\/li>\n
  • Bubble-tight shutoff<\/li>\n
  • Superior sealing reliability<\/li>\n
  • Excellent performance under thermal cycling<\/li>\n<\/ul>\n
    \n

    Product Features<\/h1>\n

    Advanced Triple Offset Technology<\/h2>\n

    Unlike double offset or concentric butterfly valves, the triple offset design prevents rubbing between sealing surfaces.<\/p>\n

    Advantages include:<\/p>\n

      \n
    • Reduced seat wear<\/li>\n
    • Increased service life<\/li>\n
    • Lower maintenance costs<\/li>\n
    • Improved shutoff performance<\/li>\n
    • Enhanced reliability in severe service<\/li>\n<\/ul>\n
      \n

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

      The valve body is manufactured from ASTM A216 WCB cast carbon steel.<\/p>\n

      Benefits include:<\/p>\n

        \n
      • Excellent structural strength<\/li>\n
      • Good weldability<\/li>\n
      • Cost-effective performance<\/li>\n
      • Suitable for oil, gas, steam, and industrial services<\/li>\n
      • Proven performance in Class 300 applications<\/li>\n<\/ul>\n
        \n

        Metal-to-Metal Sealing System<\/h2>\n

        The precision-machined sealing system offers:<\/p>\n

          \n
        • High temperature capability<\/li>\n
        • Resistance to erosion<\/li>\n
        • Resistance to thermal shock<\/li>\n
        • Long-term sealing performance<\/li>\n
        • Suitability for steam service<\/li>\n<\/ul>\n
          \n

          Raised Face Flanged Ends<\/h2>\n

          RF flanged connections provide:<\/p>\n

            \n
          • Secure installation<\/li>\n
          • Easy maintenance access<\/li>\n
          • Compatibility with ASME piping systems<\/li>\n
          • Reliable gasket sealing performance<\/li>\n<\/ul>\n
            \n

            \u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438<\/h1>\n

            Materials of Construction<\/h2>\n\n\n\n\n\n\n\n\n\n\n
            Component<\/th>\n\u041c\u0430\u0442\u0435\u0440\u0438\u0430\u043b<\/th>\n<\/tr>\n<\/thead>\n
            \u0422\u0435\u043b\u043e<\/td>\nASTM A216 WCB<\/td>\n<\/tr>\n
            \u0414\u0438\u0441\u043a<\/td>\nStainless Steel \/ WCB<\/td>\n<\/tr>\n
            Seat Ring<\/td>\nStainless Steel Alloy<\/td>\n<\/tr>\n
            \u041a\u043e\u0440\u0435\u043d\u044c<\/td>\n\u041d\u0435\u0440\u0436\u0430\u0432\u0435\u044e\u0449\u0430\u044f \u0441\u0442\u0430\u043b\u044c<\/td>\n<\/tr>\n
            Bearing<\/td>\nPTFE \/ Graphite<\/td>\n<\/tr>\n
            Fasteners<\/td>\nAlloy Steel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \n

            Design Standards<\/h2>\n\n\n\n\n\n\n\n\n\n\n
            \u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0439<\/th>\n\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435<\/th>\n<\/tr>\n<\/thead>\n
            API 609<\/td>\nButterfly Valve Design<\/td>\n<\/tr>\n
            \u0410\u0421\u041c\u042d \u041116.34<\/td>\nValve Design<\/td>\n<\/tr>\n
            ASME B16.5<\/td>\nFlanged Connections<\/td>\n<\/tr>\n
            API 598<\/td>\nInspection & Testing<\/td>\n<\/tr>\n
            ISO 5208<\/td>\nLeakage Testing<\/td>\n<\/tr>\n
            MSS SP-68<\/td>\nButterfly Valve Standard<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \n

            Advantages of Triple Offset Butterfly Valves<\/h1>\n

            Zero Leakage Performance<\/h2>\n

            The torque-seated sealing mechanism provides exceptional sealing capability even in demanding service conditions.<\/p>\n

            \n

            High Temperature Capability<\/h2>\n

            Metal seated triple offset valves can operate in temperatures significantly higher than soft-seated alternatives.<\/p>\n

            Suitable for:<\/p>\n

              \n
            • Steam systems<\/li>\n
            • Hot oil service<\/li>\n
            • Thermal processing<\/li>\n
            • Refinery operations<\/li>\n<\/ul>\n
              \n

              Long Service Life<\/h2>\n

              The friction-free design dramatically reduces wear on sealing surfaces.<\/p>\n

              Benefits include:<\/p>\n

                \n
              • Lower maintenance costs<\/li>\n
              • Increased uptime<\/li>\n
              • Extended operational life<\/li>\n<\/ul>\n
                \n

                Fire-Safe Performance<\/h2>\n

                Optional fire-safe construction can be supplied for critical oil and gas applications.<\/p>\n

                \n

                Working Principle<\/h1>\n

                The valve operates through quarter-turn rotation.<\/p>\n

                Opening<\/h3>\n
                  \n
                1. The actuator rotates the shaft.<\/li>\n
                2. The triple offset geometry disengages the disc from the seat immediately.<\/li>\n
                3. No rubbing occurs during travel.<\/li>\n
                4. Full flow capacity is achieved.<\/li>\n<\/ol>\n

                  Closing<\/h3>\n
                    \n
                  1. The disc rotates toward the seat.<\/li>\n
                  2. The final cam-like action creates sealing force.<\/li>\n
                  3. Metal-to-metal sealing occurs only at final closure.<\/li>\n
                  4. Tight shutoff is achieved.<\/li>\n<\/ol>\n

                    This unique sealing action significantly extends seat life.<\/p>\n

                    \n

                    \u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f<\/h1>\n

                    Oil & Gas Industry<\/h2>\n

                    Suitable for:<\/p>\n

                      \n
                    • Transmission pipelines<\/li>\n
                    • Refineries<\/li>\n
                    • Tank terminals<\/li>\n
                    • Offshore facilities<\/li>\n<\/ul>\n
                      \n

                      Petrochemical Plants<\/h2>\n

                      Used in:<\/p>\n

                        \n
                      • Process units<\/li>\n
                      • Utility services<\/li>\n
                      • Hydrocarbon processing<\/li>\n
                      • High-temperature systems<\/li>\n<\/ul>\n
                        \n

                        Power Generation<\/h2>\n

                        Ideal for:<\/p>\n

                          \n
                        • Main steam systems<\/li>\n
                        • Boiler applications<\/li>\n
                        • Turbine auxiliary systems<\/li>\n
                        • Cooling water systems<\/li>\n<\/ul>\n
                          \n

                          LNG Facilities<\/h2>\n

                          Applied in:<\/p>\n

                            \n
                          • Liquefaction plants<\/li>\n
                          • Storage terminals<\/li>\n
                          • Utility networks<\/li>\n
                          • Process isolation systems<\/li>\n<\/ul>\n
                            \n

                            Chemical Processing<\/h2>\n

                            Suitable for:<\/p>\n

                              \n
                            • Corrosive fluids<\/li>\n
                            • Process isolation<\/li>\n
                            • Utility services<\/li>\n
                            • High-temperature applications<\/li>\n<\/ul>\n
                              \n

                              Triple Offset vs Double Offset Butterfly Valve<\/h1>\n\n\n\n\n\n\n\n\n\n\n
                              Feature<\/th>\nTriple Offset<\/th>\nDouble Offset<\/th>\n<\/tr>\n<\/thead>\n
                              Seat Wear<\/td>\nMinimal<\/td>\nLow<\/td>\n<\/tr>\n
                              Sealing Performance<\/td>\nExcellent<\/td>\nVery Good<\/td>\n<\/tr>\n
                              High Temperature Service<\/td>\nExcellent<\/td>\nGood<\/td>\n<\/tr>\n
                              Leakage Rate<\/td>\nNear Zero<\/td>\nLow<\/td>\n<\/tr>\n
                              Service Life<\/td>\nLonger<\/td>\nLong<\/td>\n<\/tr>\n
                              Initial Cost<\/td>\nHigher<\/td>\nLower<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              For critical isolation and severe service applications, triple offset valves are generally preferred.<\/p>\n

                              \n

                              Triple Offset Butterfly Valve vs Gate Valve<\/h1>\n\n\n\n\n\n\n\n\n\n\n
                              Feature<\/th>\nTriple Offset Butterfly Valve<\/th>\n\u0417\u0430\u0434\u0432\u0438\u0436\u043a\u0430<\/th>\n<\/tr>\n<\/thead>\n
                              Weight<\/td>\nLower<\/td>\n<\/td>\n<\/tr>\n
                              Installation Space<\/td>\nSmaller<\/td>\n<\/td>\n<\/tr>\n
                              Operating Speed<\/td>\nFaster<\/td>\n<\/td>\n<\/tr>\n
                              Maintenance<\/td>\nLower<\/td>\n<\/td>\n<\/tr>\n
                              Large Diameter Cost<\/td>\nLower<\/td>\n<\/td>\n<\/tr>\n
                              Automation<\/td>\nEasier<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              For large-diameter Class 300 applications, triple offset butterfly valves often provide significant economic and operational advantages.<\/p>\n

                              \n

                              Quality Assurance<\/h1>\n

                              Every valve undergoes comprehensive quality control procedures including:<\/p>\n

                              Hydrostatic Shell Test<\/h3>\n

                              Verifies body strength and integrity.<\/p>\n

                              Seat Leakage Test<\/h3>\n

                              Confirms sealing performance.<\/p>\n

                              Material Verification<\/h3>\n

                              Ensures traceability and compliance.<\/p>\n

                              Dimensional Inspection<\/h3>\n

                              Confirms adherence to applicable standards.<\/p>\n

                              Functional Testing<\/h3>\n

                              Verifies operating performance before shipment.<\/p>\n

                              \n

                              Optional Features<\/h1>\n

                              Actuation Options<\/h2>\n
                                \n
                              • Gear Operator<\/li>\n
                              • Electric Actuator<\/li>\n
                              • Pneumatic Actuator<\/li>\n
                              • Hydraulic Actuator<\/li>\n<\/ul>\n
                                \n

                                Seat Options<\/h2>\n
                                  \n
                                • Stainless Steel Seat<\/li>\n
                                • Stellite Hardfaced Seat<\/li>\n
                                • Inconel Overlay Seat<\/li>\n<\/ul>\n
                                  \n

                                  Compliance Options<\/h2>\n
                                    \n
                                  • \u041f\u043e\u0436\u0430\u0440\u043e\u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u0430\u044f \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f<\/li>\n
                                  • \u041a\u0414\u0415\u0421 MR0175<\/li>\n
                                  • Low Fugitive Emission Design<\/li>\n
                                  • SIL Certification Support<\/li>\n<\/ul>\n
                                    \n

                                    Frequently Asked Questions<\/h1>\n

                                    What is the benefit of a triple offset butterfly valve?<\/h2>\n

                                    Triple offset valves eliminate seat friction during operation, providing longer service life and superior sealing performance.<\/p>\n

                                    \n

                                    Why choose a metal seated valve?<\/h2>\n

                                    Metal seats offer higher temperature resistance, better wear resistance, and longer service life than soft seats.<\/p>\n

                                    \n

                                    Is ASTM A216 WCB suitable for Class 300 service?<\/h2>\n

                                    Yes. ASTM A216 WCB is widely used in Class 300 industrial valve applications due to its excellent strength and durability.<\/p>\n

                                    \n

                                    Can this valve be used in steam systems?<\/h2>\n

                                    Yes. The metal seated triple offset design is ideal for high-temperature steam service.<\/p>\n

                                    \n

                                    What industries commonly use triple offset butterfly valves?<\/h2>\n

                                    Oil & gas, petrochemical, power generation, LNG, chemical processing, and industrial manufacturing.<\/p>\n

                                    \n

                                    Request a Quote<\/h1>\n

                                    China Triple Offset Butterfly Valve Manufacturer<\/h2>\n

                                    We provide:<\/p>\n

                                    \u2705 Factory Direct Pricing
                                    \n\u2705 API 609 Compliant Manufacturing
                                    \n\u2705 OEM & Custom Engineering Solutions
                                    \n\u2705 Fast Production Lead Times
                                    \n\u2705 Third-Party Inspection Support
                                    \n\u2705 Global Export Experience<\/p>\n

                                    Send Your RFQ Today<\/h3>\n

                                    Please provide:<\/p>\n

                                      \n
                                    • Valve Size (28 Inch \/ DN700)<\/li>\n
                                    • Pressure Rating (Class 300)<\/li>\n
                                    • Media Type<\/li>\n
                                    • \u0420\u0430\u0431\u043e\u0447\u0430\u044f \u0422\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430<\/li>\n
                                    • Actuation Requirements<\/li>\n
                                    • Quantity Required<\/li>\n<\/ul>\n

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

                                      \n

                                      SEO Keywords:<\/strong> Triple Eccentric Butterfly Valve, Triple Offset Butterfly Valve, 28 Inch Butterfly Valve, Class 300 Butterfly Valve, ASTM A216 WCB Butterfly Valve, RF Butterfly Valve, Metal Seated Butterfly Valve, API 609 Butterfly Valve, High Temperature Butterfly Valve, Industrial Butterfly Valve Manufacturer, China Triple Offset Butterfly Valve Supplier.<\/p>","protected":false},"excerpt":{"rendered":"

                                      \u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c \u0442\u0440\u0435\u0445\u044d\u043a\u0441\u0446\u0435\u043d\u0442\u0440\u0438\u043a\u043e\u0432\u044b\u0445 \u0434\u0438\u0441\u043a\u043e\u0432\u044b\u0445 \u0437\u0430\u0442\u0432\u043e\u0440\u043e\u0432, STV \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442 \u0442\u0440\u0435\u0445\u044d\u043a\u0441\u0446\u0435\u043d\u0442\u0440\u0438\u043a\u043e\u0432\u044b\u0439 \u0434\u0438\u0441\u043a\u043e\u0432\u044b\u0439 \u0437\u0430\u0442\u0432\u043e\u0440 \u0441 \u0447\u0435\u0440\u0432\u044f\u0447\u043d\u043e\u0439 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435\u0439, ASTM A216 wcb, 28 \u0434\u044e\u0439\u043c\u043e\u0432, 300 \u0444\u0443\u043d\u0442\u043e\u0432, API 609.<\/p>\n

                                       <\/p>","protected":false},"featured_media":6857,"template":"","meta":[],"product_brand":[],"product_cat":[965,972],"product_tag":[1930,1931,1932,1929,1933],"class_list":{"0":"post-6856","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-butterfly-valve","7":"product_cat-flange-butterfly-valve","8":"product_tag-28-inch-triple-eccentric-butterfly-valve","9":"product_tag-300lb-triple-eccentric-butterfly-valve","10":"product_tag-flange-end-triple-eccentric-butterfly-valve","11":"product_tag-triple-eccentric-butterfly-valve-manufacturer","12":"product_tag-wcb-triple-eccentric-butterfly-valve","14":"first","15":"instock","16":"shipping-taxable","17":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/product\/6856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/media\/6857"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/media?parent=6856"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/product_brand?post=6856"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/product_cat?post=6856"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/ru\/wp-json\/wp\/v2\/product_tag?post=6856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}