| Media: | Gas, Water, Steam |
|---|---|
| Driving Mode: | Pneumatic |
| Connection Form: | Flange, Weld, Wafer |
| Structure: | Centre Sealing |
| Seal Form: | Soft Sealing |
| Valve Stem: | Normal |
| Samples: |
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| Customization: |
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Stainless steel butterfly valve (also known as stainless steel flap valve) adopts triple eccentric multi-layer metal hard seal structure, which is widely used in metallurgical, electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤425ºC for regulating flow and carrying off fluid. The valve adopts triple eccentric structure, and the sealing surface of valve seat and disc plate are made of different hardness and stainless steel, which has good corrosion resistance and long service life.
Advantages of stainless steel butterfly valve:
Butterfly valve can be opened and closed conveniently, quickly, labor-saving, with small fluid resistance, and can be operated frequently.
Butterfly valve has simple structure, small volume and light weight.
Butterfly valve can be used to transport mud, and the liquid accumulated at the pipe mouth is the least.
Butterfly valve can achieve good sealing under low pressure.
Butterfly valve has good regulating performance.
The working principle of butterfly valve is very simple. It controls the flow and direction of fluid through the rotation of valve disc. When the valve disc is closed, a closed space is formed between the valve disc and the valve seat to avoid fluid leakage. When the valve disc rotates to the open state, the gap between the valve disc and the valve seat gradually expands, so that the fluid flows through the butterfly valve.
Butterfly valve control methods are divided into manual and automatic. The manual control method is usually to rotate the valve disc through the manual wheel and other devices to control the fluid.
Automatic drive can be divided into pneumatic and electric. Pneumatic butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve stem to open and close, so as to realize the activation action. It is mainly used as a block valve, and can also be designed to have the function of adjustment or valve break and adjustment. Butterfly valves are used more and more in low-pressure large and medium-diameter pipelines. The electric butterfly valve is composed of an electric actuator and a butterfly valve. There are two control modes: switch and adjustment. The electric actuator rotates to drive the butterfly valve to open and close. At the same time, the electric butterfly valve also has the function of manual operation, which is convenient to open and close the butterfly valve by manual operation when power failure occurs.
| Part | Materials |
|---|---|
| Body | Ductile Iron |
| Seat | EPDM / BUNA / VITON / PTFE |
| Disc | Ductile Iron / 316 Stainless Steal / Bronze |
| Seat | BUNA / EPDM / PTFE |
| Bushing | PTFE |
| O-Ring | EPDM / BUNA |
| Taper Pin | 316 Stainless Steel |
| Stem | 416 Stainless Steel |
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