Can be used for on and off service or throttling When positive shut-off is necessary Where a low valve profile is necessary
Butterfly Valve
Where positive shut-off is necessary Primarily for fully open or fully closed applications May be used for throttling
Gate Valve
For fully open or fully closed service, not for throttling For minimum line pressure drop For minimum fluid entrapment in the line For relatively infrequent operation
Check Valve
To control the direction of flow and for quick, automatic reactions to flow change. Swing check valves are used when a minimum resistance to flow is required. Swing check valves are recommended for use in conjunction with gate valves. They should not be used in a rapid recycling system such as reciprocating pumps or air compressor service where they could cause chatter and damaging vibration.
Globe Valve
For regulation (throttling) of flow For frequent operation; short stem travel reduces operator’s time. Where some line resistance is acceptable