Pneumatic Directional Control Valve Symbols

Because air usually exhausts to atmosphere the extra exhaust port is no problem.

Pneumatic directional control valve symbols.

Most spool type air valves come in a 5 way configuration. As with all fluid power components directional control valves can be represented by standard symbols published in iso 1219. Directional air control valves are the building blocks of pneumatic control. 4 way 2 position direct solenoid operated spring return.

2 2 way valve 2 connections 2 switching positions for 2 flow directions actuation by pressing spring return normally closed. Pneumatic circuit symbols representing these valves provide detailed information about the valve they represent. 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.

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. Basic check valves allow fluid to flow in one direction but prevent fluid from flowing in the opposite direction. 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.

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. Symbols identification and other circuit symbols.