11.08.2026 10:28
1. Wafer Butterfly Valve
Installed between two pipeline flanges and secured by long bolts or studs.
Advantages:
Compact construction
Low weight
Economical solution
Easy installation
Easy maintenance
Suitable for manual or automated operation
Typical applications include water systems, HVAC, irrigation, fire protection and industrial pipelines.
2. Lug Butterfly Valve
The body incorporates threaded lugs around its perimeter.
This configuration allows each pipeline flange to be connected independently.
Typical applications:
Industrial plants
Water treatment
Fire protection
Chemical plants
Pump stations
3. Flanged Butterfly Valve
Features integral flanged connections and is typically selected for large-diameter pipelines requiring strong mechanical connections.
Applications include water distribution, treatment plants, power plants and industrial water networks.
Butterfly Valves by Disc Geometry
4. Concentric Butterfly Valve
The shaft, disc and pipeline centreline are positioned concentrically.
Commonly used with elastomer seats such as EPDM and NBR.
5. Single Offset Butterfly Valve
The shaft is offset from the disc centre to reduce friction between the disc and sealing surface.
6. Double Offset Butterfly Valve
Also commonly known as a high-performance butterfly valve.
Advantages include:
Reduced seat friction
Lower operating torque
Longer sealing life
Improved performance at higher pressures and temperatures
7. Triple Offset Butterfly Valve
Designed for demanding high-temperature and high-pressure services.
It may incorporate metal-to-metal sealing and is commonly used in petrochemical, refinery, steam and power-generation applications.
Butterfly Valves by Seat Material
EPDM Seated: Commonly selected for water, HVAC, irrigation and fire protection.
NBR Seated: May be suitable for oil-related and selected hydrocarbon applications depending on temperature and chemical compatibility.
PTFE Seated: Preferred in applications requiring enhanced chemical resistance.
Metal Seated: Suitable for high-temperature and demanding industrial services.
Butterfly Valves by Operating Mechanism
Lever operated
Gear operated
Electric actuator operated
Pneumatic actuator operated
Hydraulic actuator operated
Small sizes can generally be operated with a lever, whereas larger diameters usually require a gearbox or actuator due to increased operating torque.
Pressure Ratings
Typical butterfly valve pressure ratings include:
PN6
PN10
PN16
PN25 and special higher-pressure designs
Valve selection must always consider maximum operating pressure, temperature, media compatibility, material selection and required safety factors.
