Description: FEATURES1. Face to Face dimensions as per as perANSI B16.10150# Narrow / EN558-2 Series 20.2. Suitable for mounting onANSI B16.5 150# flanges3. Testing as perAPI 598 / EN12266-14. Stem ...

Butterfly valves are quarter-turn rotary motion valves used as throttling valves to control flow through a system. They can be used with many different media. Butterfly valves offer several advantages ...

Figure 1 shows how this can be done. A butterfly valve has a hollow stem conducting outside air into a number of small holes and dispersing the air into the water. This can only be done if the vapor ...