High-Performance Butterfly Valve, also known as double offset butterfly valve, is engineered for demanding industrial flow control and shut-off service. Its double offset geometry lifts the disc away from the seat immediately upon opening, reducing seat friction, lowering operating torque and extending service life. Available in lug, wafer and flanged end connections, this valve delivers tight bi-directional sealing for oil & gas, chemical, power generation and high-pressure industrial water systems.
Size：NPS 2”～48”/DN50～DN4000
Pressure: 150LB～300LB/PN10～PN50；
Matrial：Carbon steel, heat-resistant steel, stainless steel, nickel-based alloy, titanium alloy, etc.
Temperature range: -196℃～300℃；
Connection method: clamp, flange, lug, etcDesign: API 609, MSS SP-67
Face To Face: API 609, MSS SP-67, DIN3202, BS EN558-1
Pressure Test: API 598
Flange Drilling: ANSI B16.1 class125, BS4504 PN10/PN16, DIN2501 PN10/PN16
Top Flange: ISO5211
Application: petroleum, petrochemical, natural gas, electric power, water conservancy and other industries.
Body | Carbon Steel | WCB |
Carbon Steel | A351 Gr CF8 CF8M CF3M | |
Disc | Carbon Steel | A351 Gr CF8 CF8M CF3M |
Retainer | Carbon Steel | A351 Gr CF8 CF8M CF3M |
Seat | PTFE PTFE+CLASS FIRER PTFE+GRARHITE | PTFE /RPTFE |
Bushing | PTFE+316SS | PTFE+316SS |
Stem | Carbon Steel | A182 F304 F316 A564 Gr.630 A479 Gr.XM-19 |
Pin | Carbon Steel | A240 Gr.316 |
Seal | PTFE | PTFE |
Gland Packing |
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1. Double eccentric design. Unique lip seal structure delivers bi-directional bubble-tight shutoff via elastic interference and self-sealing.
2. Interchangeable PTFE seats for diverse working conditions, offering long service life.
3. Anti-blowout valve stem design. Low fugitive emission packing meets ISO 15848 and API 622 standards.
4. ISO 5211 top flange, compatible with pneumatic, electric and gas-hydraulic actuators for automatic control.
Welcome to HENGFENG valves! We are a leading provider of high-quality valves and valve solutions for various industries.
Xian Hengfeng Electromechanical Equipment Co.,Ltd
No.15,group 3,Sanlian Village,Dazhao Street Office,Chang’an District,Xi’an City, Shaanxi Province
Yiwu Hengfeng Electromechanical Equipment Company
Zongtang 1st District, Jiangdong Street, Yiwu City, Jinhua City, Zhejiang Province
