The double-offset butterfly valve is a valve that has 2 counter balance. It will make the valve has a nonstop fixing surface on the circle and make the valve didn't touch the seat at all when it is completely opens. This plan will make the seat encounter a less grating and accordingly will delay its lifetime. In common application, this twofold balance butterfly valve is restricted to class 600.
Design Feature+
Less seat wear, Low torque
Super long usage life
Self-driven machinery sealing structure
Low emission packing
Double block and bleed
ISO 5211 top flange
Zero leakage
Design Standard+
Design: API 609/ISO 17292
Face to face: API609/ISO5752
Test: API598
Fire safe: API607/API6FA
End connection: ASME:16.5/ ASME:16.47
Technical Specification+
Size: 2”~60”
Class: 150#~600#
Connection: Double flange/butt weld/wafer/lug
Operation: Manual/ Worm Gear/ Pneumatic actuator/ Electric actuator Temperature: -196°C to +600°C
Application: Petrochemical/refinery/power plant/LNG/papermaking/city construction
