Butterfly valve is one of the types of valves positive shut-off quarter-turn valve. The regulating butterfly valves are majorly used in utility services such as air, gas, steam, or liquid because of two reasons: this type of butterfly valves is lower in cost and also lighter in weight.
The regulating butterfly valves are available in variety of design depending on the service and the pressure-temperature rating.
These regulation butterfly valves can also be used for vacuum service. Whenever used for cryogenic service, the butterfly valve shall be provided with extended shaft to clear the insulation.
The throttling butterfly valves are valves to regulation medium
flow rate, which can flow by both ways. The throttling butterfly
valves aren’t closing valves.Working medium
gasesMaximum working temperature
A working temperature is from - 40 °C up to + 350 °C and depends
on the body and gland packing material.
Maximum allowable differential overpressure is in accordance
with maximum allowable pressure in the valve.Operation..