The wafer-style butterfly valve often just has two or four non-threaded holes to hold it in place and align it with two flanges that are mated. When using a wafer valve, a lengthy bolt or threaded rod that goes straight through the valve’s two flanges is employed. By pulling the flanges together, the valve is held in place. The purpose of a wafer butterfly valve is to maintain a seal to guard against double-directional pressure differential in liquid flow.
The wafer-type butterfly valve has a minimal part count and is distinguished by its straightforward design, compact size, and low weight. Here are the main components of wafer butterfly valves
- Series: W110
- Size: 1.5″ to 20” (40 mm to 500 mm)
- Material: Cast Iron Gr 210, ASTM 216 WCB, ASTM 351 CF8, ASTM 351 CF8M
- Disc: ASTM 216WCB, ASTM 351 CF8, ASTM 351 CF8M
- Seat: EPDM, NBR, PTFE, SILICON, VITON
- Stem: AISI 410, 304, 316, 304L, 316L
- Gland Seal: EPDM, NBR, PTFE, SILICON, VITON
- Pressure Rating: ASA 125# / 150# / PN6 / PN10 / PN16
- End Connection: Wafer Type, Flangeless, Sandwich Type
- Design: Soft Seated
- Operation: Lever operated, Gear Operated, Pneumatic & Electric Actuator
- Design Standard: BS 5155 / API 609
- Pressure Testing: BS 6755-I / API 598
- Face to Face: ANSI B 16.10
- Flanged Drilling: ANSI 16.5/IS 6392
- Quality Assurance: ISO 9001
- NACE: MR 0103, MR 0175
- Concentric, Slim-Seal Design
- Greater Sealing Capacity
- Soft Seat Design
- Lower Torque with any fluid
- Long Service Life
- Smooth, Easy Operation
- Maintenance Free Version
- Bi-Directional Valve
- Wafer Design Body
- Offset Disc Design Butterfly Valve for high pressure & temperature service.
- Cooling air, water, and gases.
- Slurry and vacuum services.
- Compress air or gas applications.
- Regulating and isolating the flow.
- Preventing backflow in some situations.
- These valves are used with a control function in the regulation of the water intake at the bottom of outlet lines on the water side of dams or in gravity lines leading to hydro-power plants.
- These types of valves are in the pharmaceutical, chemical and food industries or in the water flow control in dams and hydroelectric power plants. In the latter two applications, butterfly valves are either used with a control function or a protection function.
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