[h=In case of specific services, choose of valve may be simplified by following established practice]2[/h]
Services Main Secondary Gases Butterfly valves
Check valves
Diaphragm valves
Lubricated plug valves
Screw down stop valvesPressure control valves
Pressure relief valves
Pressure reducing valves
Safety valves
Relief valvesLiquids - clear up to sludges and sewage Butterfly valves
Screw down stop valves
Gate valves
Lubricated plug valves
Diaphragm valves
Pinch valvesSlurries and liquids with solids Butterfly valves
Pinch valves
Gate valves
Screw down stop valves
Lubricated plug valvesSteam Butterfly valves
Gate valves
Screw down stop valves
Turbine valvesCheck valves
Pressure control valves
Pre superheated valves
Safety and relief valves



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