Pneumatic Directional Control Valve Symbol

Directional air control valves are the building blocks of pneumatic control.

Pneumatic directional control valve symbol.

The top symbol shows a manually activated valve that is pushed over against a spring. Complete directional valve symbols are created by combining the appropriate actuator and valve symbols found along the horizontal and vertical edges of the chart. 5 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return. The valves shown are all two way two position directional valves.

Symbols identification and other circuit symbols. 2 squares 2 positons. 3 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return normally open. Here is a brief breakdown of how to read a symbol.

The iso symbol contains information concerning the stability of the positions and the reset. The double arrow in the left box shows that the flow may pass in both directions. 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. This means they have two flow pipe connections and can switch into two different positions.

Directional valves comprise the largest portion of any air logic circuit.