The full range of industrial valves, actuation, piping, sealing, instrumentation and flow control products we supply and support across Australia.
Can’t find it?
Send us the spec or an old part, we source the hard-to-find and equivalents.
Can’t find it?
Send us the spec or an old part, we source the hard-to-find and equivalents.
A butterfly valve uses a circular disc mounted on a rotating shaft. In the open position the disc is parallel to flow, offering minimal restriction. Rotating the disc 90 degrees closes it across the pipe bore, sealing against a resilient liner or metal seat.
Concentric designs are cost-effective for water and general service. Double-offset (high-performance) designs reduce seat wear and improve shutoff. Triple-offset designs provide metal-seated, zero-leakage shutoff for oil, gas, and high-temperature service. Wafer design installs between flanges; lug design allows one-sided pipe removal without disturbing the other side.
| Parameter | Details |
|---|---|
| Styles | Wafer, lug, double-flanged |
| Sizes | DN50 to DN1200 |
| Pressure rating | PN6 to Class 600 (design dependent) |
| Disc materials | Ductile iron, SS316, aluminium bronze, carbon steel |
| Liner / seat | EPDM, NBR, PTFE, silicone, metal seat (triple-offset) |
| Body materials | Ductile iron, cast iron, carbon steel, stainless steel |
| Temperature range | -20°C to +400°C (design dependent) |
| Offset designs | Concentric (general), double-offset (high-performance), triple-offset (zero-leakage) |
| Operation | Lever (DN50-150), gear (DN200+), electric actuator, pneumatic actuator |
| Standards | AS 4087, ANSI B16.5, ISO 5752, API 609 |
