Flow Control - Actuation

AP-000/ 100/ 200/ 300/ 400/ 500/ 600 – Airpower Solenoid Valves 

Airpower Solenoid Valves are designed and manufactured with advanced patented air control technology making them the superior choice for all your pneumatic actuation needs.

Outdoor units eg. model AP500 have an “environmentally-protected structure” which offers protection against the ingress of liquids, dusts or other foreign matter. They operate in a constant self cleaning action with every position shift, thereby enabling the valves to achieve over a million trouble-free cycles. All the exhaust ports are threaded, allowing the use of silencers and tube connectors and various material and coil protection options are available, enabling this range to be used in any environment and hazardous classification.


Port 1 is the air supply (inlet) port and ports 5 and 3 are exhaust ports which may be equipped with silencers or speed controls to control the actuation time. Port 2 and 4 are outlet ports to be connected to the actuator input ports, A and B marked on Airpower actuators, which move the pistons of the actuator by pressure air. The airpower namur solenoid valve is normally closed as standard so that air is directed to port B of actuator when the coil is energised.

When the coil is de-energised (Figure 1), a spring on the plunger will return the plunger to its seat, blocking internal pilot air opening one of the vent ports. This vent port will allow the air on the piston to escape, and will return the spool to its normal position. In this position, the spool directs flow of supply air from inlet port 1 to outlet port 4 while outlet port 2 is connected to exhaust port 3. As for the standard assembly, the outlet port 4 is connected with port B of actuator. The air from outlet port 4 will return the pistons of actuator to closed position without electric power on the coil.

When the coil is energised (Figure 2), is energized it creates a magnetic field surrounding the plunger assembly and plunger. The plunger is lifted off its seat by this magnetic force and supply air provides an internal pilot pressure that is directed to the spool and compresses the spring. This shifting directs the flow of supply air from inlet port 1 to outlet port 2 while outlet port 4 is connected to exhaust port 5. The outlet port 2 is connected with port A of actuator moving the pistons of actuator to the open position.

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