Butterfly Valve
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The “butterfly” is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.
Types of Butterfly Valve
Based on the type of ends of the body butterfly valves are available in following types
Specification of Butterfly Valve
| Size : DN50 - DN1200 (2" - 48") |
| Class : PN-10, PN-16, ANSI 150 to ANSI 2500 JIS 10K, JIS 16K, JIS20K |
| Flange, Wafer, Lug or BW |
| Triple Offset or Concentric Lining Type |
| Cast Iron | Cast Bronze | Titanium |
| Carbon Steel | Stainless Steel | Aluminium |
| Ductile Iron | Duplex Stainless Steel | PVC |
| Water treatment and distribution | Paper and pulp industry |
| Chemical industry | Shipbuilding |
| Petrochemical plants | Gas distribution |
| Power/ Hydro electrical/ Nuclear plants | General services |
