The main classification methods of butterfly valve (1)

There are several classification methods of butterfly valves.

According to the driving method
(1) Electric butterfly valve

(2) Pneumatic butterfly valve
(3) Hydraulic butterfly valve
(4) Manual butterfly valve
According to the structure:
(1) Center sealed butterfly valve
(2) Single eccentric sealed butterfly valve
(3) Double eccentric seal butterfly valve
(4) Triple eccentric seal butterfly valve

Sealing surface material:
(1) Soft seal butterfly valve.
1) The sealing pair is composed of non-metallic soft materials versus non-metallic soft materials.
2) The sealing pair is composed of metal hard material to non-metal soft material.
(2) Metal hard seal butterfly valve. The sealing pair is composed of metal hard material to metal hard material.
According to the sealing form:
(1) Forced sealing of butterfly valve.
1) Elastic sealing butterfly valve: The sealing specific pressure is caused by the valve plate squeezing the valve seat when the valve is closed, resulting in the elasticity of the valve seat or valve plate.
2) Impressed torque sealing butterfly valve: The sealing specific pressure is generated by the torque applied to the valve shaft.
(2) Pressure-filled sealing butterfly valve: The sealing specific pressure is generated by the pressure-filling of the elastic sealing element of 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. Butterfly valve with working pressure lower than 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 a nominal pressure PN of 2.5-6.4 MPa.
(4) High-pressure butterfly valve. Butterfly valve with a nominal pressure PN of 10.0-80. 0MPa.
(5) Ultra-high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa.

According to working temperature:
(1) High temperature. Butterfly valve with t>450 °C.
(2) Medium temperature butterfly valve. Butterfly valve with 120 C<t<450 ℃.
(3) Normal temperature butterfly valve. A butterfly valve at 40C<t<120 °C.
(4) Low temperature butterfly valve. A 100<t<- 40 °C butterfly valve.
(5) Ultra-low temperature butterfly valve. Butterfly valve with t<-100 °C.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

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