A solenoid valve is controlled by an electric current through a solenoid which converts electrical signals into functions. Using the electricity, the solenoid changes the direction of air through the valve quickly. In two-ports valve, the flow is switched on or off; whereas, in three-port valves, the outflow is switched between the two outlet ports. These valves are applicable in most industries because of its high reliablity, fast and safe switching, low control power and etc.
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