Butterfly valves are quick opening valves that consist of a metal circular disc or vane with its pivot axes at right angles to the direction of flow in the pipe, which when rotated on a shaft, seals against seats in the valve body. They are normally used as throttling valves to control flow. Butterfly valves control the flow of gas or liquid by means of a disk, which turns on a diametrical axis inside a pipe or by two semicircular plates hinged on a common spindle, which permits flow in only one direction. Butterfly valves offer a rotary stem movement of 90 degrees or less, in a compact design.
| DESIGN STD | BS 5155 |
| TESTING STD | BS 5155 |
| END | WAFER END |
| MOC | CI, WCB, CF8 OR SS 304, CF8M OR SS316 etc |
| RATING | 150# |
| SIZE RANGE | ½” to 24” |