Valve FAQ

Some commonly used valve and plumbing terms, including a downloadable PDF to keep for reference.
A ball valve is an extremely durable stop valve that is designed primarily for On/Off function.
Gate valves are most suited to services requiring full flow or no flow and infrequent operation.
Check valves are mechanical valves that permit gases or liquids to flow in only one direction, preventing flow from reversing down the line.
Spring check valves have a disc held in place by a spring and ensure that gases or liquids flow in only one direction.
Swing check valves have a disc which swings into position to prevent back-flow while allowing full forward flow to be achieved through the valve.
Lift check valves work automatically with line pressure to prevent back-flow from occurring.
Globe valves have a conical plug which reciprocates into and out of the valve port, allowing for shut-off and throttling.
A foot valve is a check valve which is located at the inlet end of the suction line of a pump.
Y Strainers are designed to protect piping system components from damage caused by dirt or debris in flowing liquids or gases.
3-way ball valves converge and divert fluid flow in a piping system.
Actuators are used to operate valves automatically and/or remotely.
Pneumatic double-acting actuators use gas (typically air or nitrogen) to pressurise a double-acting cylinder in order to operate a valve.
Spring-return actuators are spring-opposed pneumatic cylinders used to open or close a valve automatically.