Concentric Double Flange Rubber Lining Butterfly Valve

The Concentric Double Flange Rubber Lining Butterfly Valve is one important kind of water works valves. The main function of 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. The ductile iron butterfly valves are widely used in industry of potable water, sewage, and sea water. Considering different connecting ends, the water work butterfly valve is classified in wafer type butterfly valve, lug butterfly valve, and flange butterfly valve, etc.

Standard:

Basic Design: EN593, API609, AWWA C504

Face to Face: ISO5752 Series 13

Connecting Ends: EN1092-2, ASME B16.5, ASME B16.47 A

Test: EN12266-1 Rating A, API 598

Design Feature:

Fully Rubber Vulcanized Seat

Double Flange Ends

Central Line Concentric

Bi-Directional

Shaft with pins or without pins

Size Range: DN50 (2") to DN3000(120")

Pressure Class: PN10, PN16, PN25

Material:

Body: Ductile Iron GGG50, GGG40, ASTM A593

Disc: Ductile Iron, Stainless Steel CF8 CF8M, Duplex Stainless Steel, Bronze

Shaft: SS416, SS431, F304, F316, F51

Seat: EPDM, NBR, Nature Rubber

Operation:

Lever, Gear, Electric Actuator, Pneumatic Actuator

Optional:

Stem Extension, WRAS Approved FBE Coating & Rubber

Thanks for your selection of RSF’s water works valves! If you have any inquiries of Concentric Double Flange Rubber Lining Butterfly Valve, please don’t hesitate to call us or email us!