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Flanged Butterfly Valve
Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they cost less than other valve designs, and are lighter weight so they need less support. The disc is positioned in the center of the pipe. A rod passes through the disc to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so it induces a pressure drop, even when open.
Construction
Parts | Material |
Body | Ductile Iron ASTM A536 Grade 65-45-12/EN-JS 1040 |
Disc | Ductile Iron ASTM A536 Grade 65-45-12/EN-JS 1040; Stainless Steel BS970 304S15/AISI 304 |
Stem | Stainless Steel |
Bushing | Bronze |
O-Ring | NBR |
Seat | EPDM/NBR |
Gear-Box | Ductile Iron |
Description
Gearbox operated.
EPDM or NBR rubber lined.
Range from DN50 up to DN2000.
Minimum load loss.
Epoxy paint 250 microns min: RAL 5017.
Standards
Design: BS EN593
Flanged: BS EN1092 PN10/PN16
Top Flange: EN ISO 5211
Pressure Rating: PN10/PN16
Working Temperature: -10℃- 120 ℃
Suitabilities
Water Drinking Water
