Schematic symbols are used to identify and graphically depict the function of fluid power components.Recognizing and understanding schematic symbols will enable you to comprehend a circuit’s function. Schematic drawings document the machine logic only and are never to be used as a piping diagram.Complete Symbols with Descriptions. Two position, two way, normally open plunger operated valve with a spring return. Two position, two way, normally closed direct solenoid operated valve with a spring return.Two position, four way, solenoid air pilot valve with spring return. Two position, four way, air pilot valve with spring return. Actuators perform the work in Fluid Power Circuits. They are used to clamp, move, rotate, turn and position. Cylinders are used for linear movements while rotaryactuators are used for limited rotational applications and air motors are used for continuous rotation.
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