Featuring a double eccentric (double offset) design<\/strong>, the valve minimizes seat wear during operation, significantly extending service life and reducing maintenance requirements. The resilient EPDM seat<\/strong> ensures bubble-tight sealing performance for water and non-oil applications, while the gear operator<\/strong> enables smooth and precise valve operation for large-diameter pipelines.<\/p>\n With a nominal size of DN800 (32 Inch)<\/strong> and a pressure rating of PN25<\/strong>, this valve is widely used in municipal water systems, industrial utilities, power plants, marine facilities, and infrastructure projects worldwide.<\/p>\n A double offset butterfly valve, also known as a double eccentric butterfly valve<\/strong>, incorporates two design offsets:<\/p>\n The shaft is positioned behind the sealing surface centerline.<\/p>\n The shaft is offset from the pipeline centerline.<\/p>\n These offsets allow the disc to disengage from the seat immediately upon opening, reducing friction and seat wear.<\/p>\n The valve body and disc are manufactured from Duplex Stainless Steel 2205, offering:<\/p>\n Excellent resistance against:<\/p>\n Compared to conventional stainless steel:<\/p>\n Ideal for demanding industrial and marine applications.<\/p>\n The EPDM seat provides:<\/p>\n Suitable media include:<\/p>\n The enclosed gearbox provides:<\/p>\n The gear operator is especially important for DN800 valves where manual operation would require excessive torque.<\/p>\n The double offset geometry significantly reduces friction between the disc and seat.<\/p>\n Benefits:<\/p>\n The EPDM seat achieves reliable shutoff performance for water service applications.<\/p>\n Suitable for:<\/p>\n Unlike concentric butterfly valves, the disc contacts the seat only during final closure.<\/p>\n This results in:<\/p>\n The valve operates through quarter-turn rotation.<\/p>\n Duplex 2205 construction provides excellent resistance to seawater corrosion.<\/p>\n Common applications:<\/p>\n Suitable for:<\/p>\n Widely used in:<\/p>\n Installed in:<\/p>\n Suitable for:<\/p>\n Every valve is manufactured under strict quality control procedures.<\/p>\n Testing complies with:<\/p>\n Double offset valves reduce seat friction, lower operating torque, and extend service life compared to concentric butterfly valves.<\/p>\n 2205 offers excellent corrosion resistance, high strength, and superior performance in chloride-rich environments such as seawater systems.<\/p>\n Yes. EPDM is widely used in potable water, cooling water, and wastewater applications.<\/p>\n Large-diameter valves require significant operating torque. A gearbox ensures safe and efficient operation.<\/p>\n Yes. Duplex Stainless Steel 2205 is one of the preferred materials for seawater and desalination applications.<\/p>\n We provide:<\/p>\n \u2705 Factory Direct Pricing Please provide:<\/p>\n Our engineering team will provide a detailed quotation, datasheet, GA drawing, and delivery schedule within 24 hours.<\/p>\n SEO Keywords:<\/strong> Double Offset Butterfly Valve DN800, PN25 Butterfly Valve, Duplex Stainless Steel 2205 Butterfly Valve, Gear Operated Butterfly Valve, High Performance Butterfly Valve, Double Eccentric Butterfly Valve, Seawater Butterfly Valve, Water Treatment Butterfly Valve, Duplex 2205 Valve Manufacturer, China Butterfly Valve Supplier<\/p>\n \n","protected":false},"excerpt":{"rendered":" STV Valve Technology Group Co., Ltd is a professional leader China Double Offset Butterfly Valve,DN800 Double Offset Butterfly Valve,PN25 Double Offset Butterfly Valve, DIN 593 Double Offset Butterfly Valve,2205 Trim Double Offset Butterfly Valve,EPDM Seat Double Offset Butterfly Valve,Gear OP Double Offset Butterfly Valve Manufacture with high quality and competitive price.<\/p>","protected":false},"featured_media":8238,"template":"","meta":[],"product_brand":[],"product_cat":[965,972],"product_tag":[3577,3576,3574,3573,3578,3579,3575],"class_list":{"0":"post-8237","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-2205-trim-double-offset-butterfly-valve","9":"product_tag-din-593-double-offset-butterfly-valve","10":"product_tag-dn800-double-offset-butterfly-valve","11":"product_tag-double-offset-butterfly-valve","12":"product_tag-epdm-seat-double-offset-butterfly-valve","13":"product_tag-gear-op-double-offset-butterfly-valve-manufacture","14":"product_tag-pn25-double-offset-butterfly-valve","16":"first","17":"instock","18":"shipping-taxable","19":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/product\/8237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/media\/8238"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/media?parent=8237"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/product_brand?post=8237"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/product_cat?post=8237"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/es\/wp-json\/wp\/v2\/product_tag?post=8237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nProduct Overview<\/h2>\n
\n\n
\n \nItem<\/th>\n Specification<\/th>\n<\/tr>\n<\/thead>\n \n Product Name<\/td>\n Double Offset Butterfly Valve<\/td>\n<\/tr>\n \n Valve Type<\/td>\n High Performance Butterfly Valve<\/td>\n<\/tr>\n \n Nominal Size<\/td>\n DN800 (32 Inch)<\/td>\n<\/tr>\n \n Pressure Rating<\/td>\n PN25<\/td>\n<\/tr>\n \n Design<\/td>\n Double Offset<\/td>\n<\/tr>\n \n Body Material<\/td>\n Duplex Stainless Steel 2205<\/td>\n<\/tr>\n \n Disc Material<\/td>\n Duplex Stainless Steel 2205<\/td>\n<\/tr>\n \n Stem Material<\/td>\n Duplex Stainless Steel<\/td>\n<\/tr>\n \n Seat Material<\/td>\n EPDM<\/td>\n<\/tr>\n \n Operation<\/td>\n Gear Operated<\/td>\n<\/tr>\n \n End Connection<\/td>\n Flanged<\/td>\n<\/tr>\n \n Design Standard<\/td>\n EN 593 \/ API 609<\/td>\n<\/tr>\n \n Face-to-Face<\/td>\n EN 558 Series 13<\/td>\n<\/tr>\n \n Flange Standard<\/td>\n EN 1092-1 PN25<\/td>\n<\/tr>\n \n Inspection & Testing<\/td>\n EN 12266-1 \/ API 598<\/td>\n<\/tr>\n \n Leakage Rate<\/td>\n Zero Leakage<\/td>\n<\/tr>\n \n Temperature Range<\/td>\n -20\u00b0C to +120\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\nProduct Gallery<\/h2>\n
<\/div>\n<\/div>\n<\/div>\n
\nWhat Is a Double Offset Butterfly Valve?<\/h1>\n
First Offset<\/h3>\n
Second Offset<\/h3>\n
Benefits of Double Offset Design<\/h3>\n
\n
\nKey Features<\/h1>\n
Duplex Stainless Steel 2205 Body & Disc<\/h2>\n
Exceptional Corrosion Resistance<\/h3>\n
\n
High Mechanical Strength<\/h3>\n
\n
Longer Service Life<\/h3>\n
\nEPDM Resilient Seat<\/h2>\n
\n
\n
\nHeavy-Duty Gear Operator<\/h2>\n
\n
\nTechnical Advantages<\/h1>\n
Low Torque Operation<\/h2>\n
\n
\nZero Leakage Performance<\/h2>\n
\n
\nReduced Seat Wear<\/h2>\n
\n
\nTechnical Specifications<\/h1>\n
Materials of Construction<\/h2>\n
\n\n
\n \nComponent<\/th>\n Material<\/th>\n<\/tr>\n<\/thead>\n \n Body<\/td>\n Duplex Stainless Steel 2205<\/td>\n<\/tr>\n \n Disc<\/td>\n Duplex Stainless Steel 2205<\/td>\n<\/tr>\n \n Stem<\/td>\n Duplex Stainless Steel<\/td>\n<\/tr>\n \n Seat<\/td>\n EPDM<\/td>\n<\/tr>\n \n Bearings<\/td>\n PTFE<\/td>\n<\/tr>\n \n Fasteners<\/td>\n Stainless Steel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\nDimensional Range<\/h2>\n
\n\n
\n \nParameter<\/th>\n Value<\/th>\n<\/tr>\n<\/thead>\n \n Size<\/td>\n DN800<\/td>\n<\/tr>\n \n Pressure Class<\/td>\n PN25<\/td>\n<\/tr>\n \n Maximum Working Pressure<\/td>\n 25 Bar<\/td>\n<\/tr>\n \n Temperature Range<\/td>\n -20\u00b0C to +120\u00b0C<\/td>\n<\/tr>\n \n Operation<\/td>\n Gearbox<\/td>\n<\/tr>\n \n Connection Type<\/td>\n Flanged<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\nWorking Principle<\/h1>\n
<\/div>\n<\/div>\n<\/div>\n
<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
Opening<\/h3>\n
\n
Closing<\/h3>\n
\n
\nApplications<\/h1>\n
Desalination Plants<\/h2>\n
\n
\nMunicipal Water Supply<\/h2>\n
\n
\nWastewater Treatment<\/h2>\n
\n
\nOffshore & Marine Industry<\/h2>\n
<\/div>\n<\/div>\n<\/div>\n
<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
\n
\nPower Generation<\/h2>\n
\n
\nQuality Assurance<\/h1>\n
Standard Tests<\/h2>\n
\n
\n
\nAvailable Options<\/h1>\n
Seat Materials<\/h2>\n
\n
\nActuation Options<\/h2>\n
\n
\nBody Materials<\/h2>\n
\n
\nFrequently Asked Questions<\/h1>\n
What is the advantage of a double offset butterfly valve?<\/h2>\n
\nWhy choose Duplex Stainless Steel 2205?<\/h2>\n
\nIs EPDM suitable for drinking water?<\/h2>\n
\nWhy is a gear operator required for DN800 valves?<\/h2>\n
\nCan this valve be used in seawater systems?<\/h2>\n
\nRelated Products<\/h1>\n
\n
\nRequest a Quote<\/h1>\n
China DN800 PN25 Double Offset Butterfly Valve Manufacturer<\/h2>\n
\u2705 OEM & Custom Manufacturing
\u2705 Fast Production Lead Times
\u2705 EN 10204 3.1 Material Certificates
\u2705 Third-Party Inspection Support
\u2705 Worldwide Project Experience<\/p>\nSend Your Inquiry Today<\/h3>\n
\n