The inflatable Wafer Type Butterfly Valve or Lug Type Butterfly Valve use compressed air pressure to expand the seat against on the disc sealing surface, providing even pressure distribution for a bubble tight seal. Because the seat makes only casual contact with the disc during wafer type Butterfly Valve opening and closing, there is minimal disc impingement. This is in contrast to conventional wafer type butterfly valve or lug type butterfly valve where disc impingement leads to shaving of he seat, decreasing the overall performance and valve life.
The inflatable wafer type butterfly valve or lug type butterfly valve are widely used in pharmacy, food, and powder industry, because the inflatable butterfly valve special design make the friction between disc and rubber seat much less, this help to get longer life of butterfly valve.
The butterfly valve is one kind of important water works valves like gate valve and Check Valve, which is widely used in water transmission system.
The main function of Concentric Wafer Type Butterfly Valve is to control fluid flow rate in pipeline: turn handle or other actuator, the disc will rotate; lock the disc at the specified angle by locking device; the fluid flow rate depends on the disc angle; when the disc is turned 90℃ to the valve bore center line, the pipeline is cut off. Considering different connecting ends, the Water Work Butterfly Valve is classified in wafer type butterfly valve, Lug Butterfly Valve, and Flange butterfly valve, etc. The ductile iron butterfly valves are widely used in industry of potable water, sewage, and sea water.
Standard:
Basic Design: EN593, API609, AWWA C504
Face to Face: ISO5752 EN558, API 609
Connecting Ends: EN1092-2, ASME B16.5, ASME B16.47 A
Test: EN12266-1, API 598
Design Feature:
Rubber Seat, Air Expand the Seat
Wafer Connecting
Central Line
Bi-Directional
Less Friction, Low Torque, Less Wear
Size Range: DN50 (2") to DN500(20")
Pressure Class: PN10, PN16, Vacuum, 100PSI
Material:
Body: Ductile Iron GGG50, GGG40
Disc: Stainless Steel CF8 CF8M
Shaft: SS416, SS431, F304, F316
Seat: EPDM, NBR
Operation:
Pneumatic Actuator
Optional:
FDA, WRAS Approved FBE Coating & Rubber
Warmly welcome to choose our water works valves! If you have any inquiries of our Inflatable Concentric Wafer Type Butterfly Valve or concentric Lug butterfly valve, please don’t hesitate to call us or email us!
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