Butterfly valve types and classification
Classification of butterfly valves, butterfly valves are usually classified according to such as: structural form, connection method, sealing form, driving method, use, etc. The commonly used classification methods are as follows:
Classification by structure
- Centerline Butterfly Valve
- Single eccentric butterfly valve
- Double eccentric butterfly valve
- Triple eccentric butterfly valve
Classification by connection method
- Wafer butterfly valve
- Flanged butterfly valve
- Lug butterfly valve
- Welded butterfly valve
Classification by sealing surface material
- Soft Seal Butterfly Valve: Non-metallic materials for sealing auxiliary materials, such as rubber, silicone rubber, PTFE, etc.
- Hard Seal Butterfly Valve: The sealing pair is composed of metal hard materials, such as: 304 stainless steel, cemented carbide, etc.
Classification by work pressure
- Vacuum butterfly valve. Butterfly valve with working pressure lower than standard atmospheric pressure.
- Low pressure butterfly valve. Butterfly valve with nominal pressure PN<1.6MPa.
- Medium pressure butterfly valve. Butterfly valve with nominal pressure PN of 2.5–6.4MPa.
- High pressure butterfly valve. Butterfly valve with nominal pressure PN of 10.0–80.0MPa.
- Super high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa.
Classification by drive method
- Handle butterfly valve.
- Worm gear butterfly valve.
- Electric butterfly valve.
- Pneumatic butterfly valve.
- Hydraulic butterfly valve.
Classified by work purpose
- Ventilation butterfly valve.
- Pipe network butterfly valve.
- Dust butterfly valve.
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