QT450 Concentric Butterfly Valve, API 609, 4 Inch, 150 LB

Product Name: Concentric Butterfly Valve
Design Standard: API 609
Body Material: Ductile Iron QT450
Disc Material: ASTM A351 CF8
Size: 4 Inch, DN100
Pressure: Class 150 LB, PN16
End Connection: Wafer End
Operation: Lever

The Wafer Concentric Butterfly Valve is designed to maintain a seal against bi-directional pressure differentials, preventing backflow in systems intended for unidirectional flow. This is achieved through a tightly fitting seal, gasket, O-ring, and precision-machined components, along with a flat valve face on both the upstream and downstream sides. The valves are equipped with threaded inserts on both sides of the valve body, allowing for installation with two sets of bolts, eliminating the need for nuts. The valve is installed between two flanges, with a separate set of bolts for each flange. This configuration enables either side of the piping system to be disconnected without disturbing the other side.

Technical Specification

» Normal Size Range: 2-48 Inch (DN50-DN1200)

» Normal Pressure Rating: Class 150 LB, PN10, PN16

» Material: GG25, GGG40, ASTM A216 WCB, ASTM A351 CF8, CF8M, CF3, CF3M

» Optional Seatings: Resilient NBR, EPDM, VITON

» Operation: Handle, Handwheel, Pneumatic, Electric

» Temperature Range: -29°C to 120°C

» End Connections: Wafer, Lug, RF Flange

» Design and Manufacture Standards: GB/T 12228, API 609

» Face to Face (End to End): GB/T 12221

» Flanged Connections: ANSI B16.5, GB/T 9113

» Test and Inspection Standards: API 598, GB/T 13927