Solenoid Valve Electrical Symbols and Graphics_ Solenoid Valve Wiring Diagram

Meaning of solenoid valve graphic symbols

1. The working position of the valve is represented by boxes. Each box represents a working position of the solenoid valve, i.e. "position". Several boxes represent several "positions". For example, two position three-way solenoid valve represents two working positions.

2. The arrow in the box indicates that the oil circuit is connected, but the arrow direction does not necessarily indicate the actual direction of liquid flow;

3. The symbol "┻" or "┳" in the box indicates that the channel is blocked;

4. The number of interfaces connected outside the box indicates several "connections";

5. Generally, the oil inlet / air inlet connected between the valve and the system oil supply circuit or air circuit is represented by the letter P; The oil / air return port connected between the valve and the system oil / air return circuit is represented by T (sometimes o); The oil port / air port connected between the valve and the actuator is represented by a, B, etc. Sometimes, l is used on the graphic symbol to represent the oil leakage port;

6. The directional valve has two or more working positions, one of which is the normal position, that is, the position where the valve core is not subject to the control force. The middle position in the graphic symbol is the normal position of the three position valve. The two position valve with spring return takes the path state in the box close to the spring as its normal position. When drawing the system diagram, the oil / gas circuit shall generally be connected to the normal position of the directional valve.

Solenoid valve electrical symbols and graphics

Solenoid valve wiring diagram

AC doesn't matter. DC has positive and negative poles. Pay attention to the same voltage.

The arrow in the figure below refers to the solenoid valve, which is used to control the on and off of the air flow channel of the water spray system of the low-pressure rear cylinder of the steam turbine.

The low-pressure cylinder water spray system provides condensate to the nozzle on the water spray ring at each end of the double flow low-pressure cylinder. When the working condition of the steam turbine requires the low-pressure cylinder water spray system to be put into operation, the solenoid valve in the system is connected and the air is supplied to the actuator of the water spray flow control valve. In this way, the condensate is led to the nozzle on the exhaust guide ring of low-pressure cylinder. In addition, the condensate pressure measuring point of the pressure controller feels the pressure signal.

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