Pneumatic Directional Control Valve Symbols

2 2 way valve 2 connections 2 switching positions for 2 flow directions actuation by pressing spring return normally closed.

Pneumatic directional control valve symbols.

Pneumatic symbols directional control valves process valves description image description image 2 2 way valve air operated nc angle valve 2 way 2 2 way valve direct operated nc ball valve 2 way 2 2 way valve pilot operated nc ball valve 3 way l 3 2 way valve air operated nc ball valve 3 way t. 5 3 way single pilot pneumatic valve pneumatically actuated in both. 5 way directional control valves figures 8 16 through 8 20 show symbols of some 5 way air valves. Because air usually exhausts to atmosphere the extra exhaust port is no problem.

Perhaps the simplest of all directional control valves is the check valve a specific type of binary valve. Basic check valves allow fluid to flow in one direction but prevent fluid from flowing in the opposite direction. Symbols show the methods of actuation the number of positions the flow paths and the number of ports. The valves shown are all two way two position directional valves.

The top symbol shows a manually activated valve that is pushed over against a spring. Here is a brief breakdown of how to read a symbol. Directional air control valves are the building blocks of pneumatic control. 4 way 2 position direct solenoid operated spring return.

This means they have two flow pipe connections and can switch into two different positions. The double arrow in the left box shows that the flow may pass in both directions. Symbols identification and other circuit symbols.