Stainless Steel Material Wafer Butterfly Valve BSEN 593 Design & Manufacturing Standard

Stainless Steel Material Wafer Butterfly Valve BSEN 593 Design & Manufacturing Standard

Butterfly Valves

Design: Seal on Body, Seal on Disc, High Performance – Double & Triple Offset.

Typical Applications: Gas Processing, Petrochemical, Chemical, Water & Sewage, Power and Mining.

End Connections: Wafer, Lugged and Double Flanged (ANSI & AS4087)

Pressure Class Range: ANSI Class 150 to 900, PN10 / PN16 / PN25 / PN40 / PN64

Sizes: DN50 to DN3600 (2” to 144”).

Body Materials: Carbon Steel, Stainless Steel, Cast Iron, Ductile Iron, PFA / PTFE Lined.

Seat & Seal Materials: Virgin PTFE, Reinforced PTFE, PFA, Viton, NBR, EPDM and Metal.

Accessories: Actuators, Limit Switchboxes, Solenoids, Extensions and Special Adaptions.

Quality: Pressure Tests – API 598, Fire Tests – API 6FA, API 607.

Standards: Design, Production and Testing: AS, ASME, ANSI, API, and ASTM. Quality System: EN ISO 9001:2008, EN ISO 14001:2004.

Design Details: A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve (quarter turn) which allows for quick shut off. Butterfly valves are generally favoured because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the centre of the pipe, passing through the disc is a rod connected 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, therefore a pressure drop is always induced in the flow, regardless of valve position. The valve may also be opened incrementally to throttle flow.