Overview
The Sullair solenoid valve is the core component of the air control circuit. Its main function is to control the coordinated work of different pneumatic components by changing the flow path of the control gas to achieve the overall goal of pneumatic control of the air compressor. Sullair solenoid valves are generally 3-way. When working, they connect the circuit from the gas tank to the pneumatic components, and the pressure gas control components act; when not working, they cut off the power circuit and exhaust the remaining pressure gas in the pneumatic components to the atmosphere. Solenoid valve is one of the air compressor accessories in the air compressor pneumatic control.
Maintenance of solenoid valve
Refer to the figure below for the structure of the solenoid valve. There is very little maintenance work, but it can be cleaned regularly. Generally speaking, if the working voltage is appropriate, when the solenoid valve is slow or leaking, cleaning is required. The steps are as follows:
(1) Disconnect the connector on the solenoid valve coil;
(2) Remove the fixing nut and take out the electromagnetic coil;
(3) Unscrew the screw on the valve body, remove the valve core, valve core spring and sealing ring;
(4) Unscrew the bottom cover, take out the sealing ring, spring and valve needle;
(5) Clean all parts;
(6) Replace the coil or spool;
(7) Reassemble the solenoid valve
Structure of Sullair Solenoid valve
The working mechanism of the solenoid valve: Normally open usage (3 ports for pressure)
When the solenoid coil is de-energized, pressure is applied, and the pressure is released when it is energized. When the solenoid coil is de-energized, the pressurized gas flows from port “3” to port “1”, and port “2” is closed. When the solenoid coil is energized, the pressurized gas flows from port “1” to port “2”, and port “3” is closed.
Normally closed usage (2 ports for pressure)
When the solenoid coil is energized, it applies pressure, and when it is de-energized, it releases the pressure. When the solenoid coil is de-energized, the pressurized gas flows from port “1” to port “3”, and port “2” is closed. When the solenoid coil is energized, the pressurized gas flows from port “2” to port “1”, and port “3” is closed.
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