31 rotary drilling rig electromagnetic valve is what?
The direct current electromagnet voltage is generally 24 volts. The utility model has the advantages that the operation is reliable, the service life is long, the volume is small, but the starting force is smaller than that of the AC electromagnet, and the rectifier device is needed when the DC power supply is not available.In order to improve the reliability and life of solenoid valve in recent years at home and abroad, is widely used in wet electromagnet, the electromagnet and valve push rod without sealing, eliminates the O seal friction ring, the electromagnetic coil outside its direct use of engineering plastic sealing, one metal shell, so as to ensure the insulation, and good heat dissipation, so the impact is small, reliable work, long service life.
Solenoid valve according to different requirements can be achieved two, three, two, five, etc..Solenoid operated solenoid valve is divided into two kinds of AC and DC(1) the voltage of an alternating current electromagnet is usually 220 volts. It is characterized by large starting force, short commutation time and low price. But when the valve core is jammed or the suction is not enough, the iron core can not be sucked on, and the electromagnet is easy to burn out because the current is too large, so the work reliability is poor, the operation has the impact and the service life is low.
The solenoid valve is used to drive the valve core to control the direction of compressed air, so as to control the direction of the pneumatic actuator switch.Its advantage is simple operation, easy to realize remote control.
