What are the different types of butterfly valves?
Jan 19, 2022
Butterfly Valves have different types according to stucture, sealing surface material,sealing form,working pressure and Operating temperature.
1.According to Structure
(1) Center sealing butterfly valve
(2) Single eccentric sealing butterfly valve
(3) Double eccentric sealing butterfly valve
(4) Triple eccentric sealing butterfly valve
2. According to Sealing Surface Material
(1) Soft Seat Butterfly Valve. One type: The sealing pair is composed of non-metallic soft material to non-metallic soft material. Another type: the sealing pair is composed of metal hard material and non-metal soft material.
(2) Metal hard sealing butterfly valve. The sealing pair is composed of metal hard material to metal hard material.
3.According to Sealing form
(1) Forced sealing butterfly valve , one kind is elastic sealing butterfly valve. The sealing specific pressure is generated by the elasticity of the valve seat or valve plate when the valve plate squeezes the valve seat when the valve is closed. Another kind is external torque sealing butterfly valve. The seal specific pressure is generated by the torque applied to the valve shaft.
(2) Pressurized sealing butterfly valve. The sealing specific pressure is generated by the charging of 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.
4. According to Working pressure
(1) Vacuum butterfly valve. Butterfly valve whose working pressure is lower than standard reactor atmospheric calendar.
(2) Low pressure butterfly valve. Nominal pressure PN<1. 6MPa butterfly valve.
(3) Medium pressure butterfly valve. The nominal pressure PN is 2.5--6.4MPa butterfly valve.
(4) High pressure butterfly valve. The nominal pressure PN is 10.0--80.0MPa butterfly valve.
(5) Ultra-high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa.
If you want any one type of butterfly valves, please send us e-mail to sales2@cx-hoses-fittings.com. Thanks.
