Pneumatic Directional Control Valve Symbol

Pneumatic circuit symbols representing these valves provide detailed information about the valve they represent.

Pneumatic directional control valve symbol.

The iso symbol contains information concerning the stability of the positions and the reset. 2 squares 2 positons. Symbols identification and other circuit symbols. Directional air control valves are the building blocks of pneumatic control.

Directional valves comprise the largest portion of any air logic circuit. This means they have two flow pipe connections and can switch into two different positions. Symbols show the methods of actuation the number of positions the flow paths and the number of ports. Here is a brief breakdown of how to read a symbol.

The double arrow in the left box shows that the flow may pass in both directions. 5 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return. 3 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return normally open. The valves shown are all two way two position directional valves.

Directional valves number of ports and positions the directional valves are described by the numbers of ports in the main valve excluding pilot ports and the number of positions the valve can take number of ports number of positons for example.