Pneumatic Directional Control Valve Symbol

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

Pneumatic directional control valve symbol. Symbols identification and other circuit symbols. Symbols show the methods of actuation the number of positions the flow paths and the number of ports. Directional valves comprise the largest portion of any air logic circuit. Complete directional valve symbols are created by combining the appropriate actuator and valve symbols found along the horizontal and vertical edges of the chart.

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. 3 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return normally open. This means they have two flow pipe connections and can switch into two different positions.

The top symbol shows a manually activated valve that is pushed over against a spring. The valves shown are all two way two position directional valves. 2 squares 2 positons. Directional air control valves are the building blocks of pneumatic control.

5 2 way single pilot pneumatic valve pneumatically actuated in one direction spring return.