Flanged Triple Offset Butterfly Valve

Flanged Triple Offset Butterfly Valve

Basic information
Basic information
This valve acts as an opening and closing mechanism to control the flow of gas, liquid, semiliquid and microparticle powder transmission lines or containers.
Features
Features
1. Seat and disc almost no wear, sealing performance tighter;
2. Sealing surface adopts hard facing alloy, the sealing surface is wear-resistant and has a long service life;
3. Disc with large size adopts a quilted structure with high strength, large flow area, and small flow resistance;
4. It has an excellent sealing performance at low temperature and high temperature.
Principle
Principle
The pressure on its sealing surface is produced by the torque of the transmission and the action of the dielectric pressure on the valve plate. When the pressure of positive medium increases, the tighter the pressure between the disc oblique cone surface and the seat sealing surface, the better the sealing effect. When in reverse flow mode, the sealing between the disc and seat is driven by the torque of the actuator to force the disc towards the seat. As the pressure of the reverse medium increases, the unit positive pressure between the valve plate and the seat is less than the pressure of the medium.
Installation and Commissioning
Installation and Commissioning
According to user requirements, the butterfly valve with a hard seal can be designed with two-way sealing function. It can be installed in any direction without restriction of the flow direction of medium or space position. For specific use, please consult ZhengFeng Valve Group.

Part

Material

Standard

Body

WCB

ASTM A216

Disc

WCB

ASTM A216

Packing

Graphite


Stem

Stainless Steel 431

EN10088-1/ASTM A959

Sealing

Stainless Steel 431

EN10088-1/ASTM A959

Worm Actuator

WCB

ASTM A216

For the materials options not listed, consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials
Size Range: 2"~80"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: API 609
Flange End Dimension: ANSI B16.5
Inspection and Test: API 609

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