4-Way Reversing Valve working principle
4-Way Reversing Valve is the use of electromagnetic iron to push the valve core to control the direction of the liquid flow. The use of electromagnetic reversing valve can make the operation light and easy to realize the automation operation, so the application is very wide.
4-Way Reversing Valveis only used to manipulate the spool valve spool movement, and the valve core structure and type can be a variety of, so the 4-Way Reversing Valve can be two-bit two-way, two-way tee, two-position four-way, three-way and three-bit five-pass and other types. General two-position valve with an electromagnet, three-position valve requires two electromagnet. Solenoid valve for the operation of the electromagnet divided into AC, DC two, alternating current electromagnet voltage is generally 220 volts.
It is characterized by a large starting force, short commutation time and low price. But when the spool is stuck or the suction is not enough to make the iron core sucked, the electromagnet is prone to burnout due to excessive current, so the work reliability is poor, the action has impact, life is low.
The DC solenoid voltage is typically 24 volts. The advantages of the work is reliable, not because the valve core stuck and burned, long life, small size, but the starting force is smaller than the AC electromagnet, and in the absence of DC power supply, the need for rectification equipment. In order to improve the working reliability and life of solenoid valve, in recent years, domestic and foreign are increasingly widely used wet electromagnet, this electromagnet and sliding valve between the rod without sealing, eliminating the O-ring friction, the electromagnetic coil outside the direct use of engineering plastics sealing, not another metal casing, so that both the insulation, but also conducive to heat dissipation, So the work is reliable, small impact, long life.http://www.shunfengvalve.com/4-way-reversing-valve-working-principle/4-Way Reversing Valve used in reversible refrigeration systems