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OEM Flange Type Double Offset Butterfly Valve Factory, Factories
Product Description
Double offset butterfly valve has two offsets.
- 1st: the axis of the shaft deviate from the center of the disc;
- 2nd: the axis of the shaft deviate from the pipeline center.
The suitable application for double offset butterfly valve is: working pressure under 4MPa, working temperature under 180℃ as it has a rubber sealing surface.
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN2200 |
| Pressure Rating | PN10, PN16, CL150, JIS 5K, JIS 10K |
| Face to Face STD | API609, BS5155, DIN3202, ISO5752 |
| Connection STD | PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259 |
| Upper Flange STD | ISO 5211 |
| Material | |
| Body | Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) |
| Disc | DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | NBR, EPDM/REPDM, Viton, Silicon |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
Frequently Asked Questions
What are the two offsets in a double offset butterfly valve?
The first offset is the axis of the shaft deviating from the disc center, and the second offset is the axis of the shaft deviating from the pipeline center.
What is the maximum operating pressure and temperature?
These valves are designed for working pressures under 4MPa and operating temperatures under 180℃ due to the rubber sealing configuration.
What size ranges are available for this valve?
The standard production sizes range from DN40 up to DN2200 to meet various industrial pipeline requirements.
Which actuation methods can be installed?
The valves can be operated manually via hand lever or gear box, or automated using electric or pneumatic actuators via the ISO 5211 top flange.
What seat materials are available?
Available seat materials include NBR, EPDM/REPDM, Viton, and Silicon to ensure compatibility with different fluid mediums and operational conditions.
