How Many Types Of Butterfly Valves Can Be Divided Into?

How many kinds of butterfly valves can be introduced from various aspects?

According to the driving mode: (1) Electric butterfly valve (2) Pneumatic butterfly valve (3) Hydraulic butterfly valve (4) Manual butterfly valve

According to the structure: (1) center sealing butterfly valve (2) single eccentric sealing butterfly valve (3) double eccentric sealing butterfly valve (4) triple eccentric sealing butterfly valve

The sealing surface material is divided into (1) soft sealing butterfly valve.

1) The sealing pair is composed of non-metallic soft material to non-metallic soft material.

2) The sealing pair is composed of metal hard material and non-metal soft material.

(2) Metal hard seal butterfly valve. The sealing pair is made of metal hard material to metal hard material.

According to the sealing form:

(1) Mandatory seal butterfly valve.

1) Elastic sealing butterfly valve. The sealing specific pressure is generated by the valve plate pressing the valve seat when the valve is closed, and the elasticity of the valve seat or valve plate.

2) Applied torque sealing butterfly valve. The seal specific pressure is generated by the torque applied to the valve shaft.

(2) Pressure sealing butterfly valve. The sealing specific pressure is generated by pressurizing the elastic sealing element on the valve seat or valve plate.

(3) Automatic sealing butterfly valve. The sealing specific pressure is automatically generated by the medium pressure.

According to working pressure:

(1) Vacuum butterfly valve. A butterfly valve whose working pressure is lower than the standard stack atmospheric pressure.

(2) Low pressure butterfly valve. Butterfly valve with nominal pressure PN<1.6MPa.

(3) Medium pressure butterfly valve. Butterfly valve with nominal pressure PN of 2.5--6.4MPa.

(4) High pressure butterfly valve. Butterfly valve with nominal pressure PN of 10.0--80.0MPa.

(5) Ultra-high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa.

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