Control valve, also known as the control valve, is the main type of actuator, by receiving the control signal output by the control control unit to change the fluid flow.
Solenoid valve is generated by solenoid coil power electromagnetic force to absorb solenoid mobile piston control open and off fluid control element, is the pipeline of the actuator of automation equipment, the following shows the direct piston solenoid valve working diagram, pilot piston solenoid valve working diagram, with manual reset solenoid valve working diagram and self-maintained solenoid valve and gas emergency cut solenoid valve working principle is introduced.
Principle of direct moving piston type solenoid valve: when energized, the solenoid coil produces electromagnetic force, directly absorb the valve core, the valve core lift. When the power is cut off, the electromagnetic force disappears, and the spool is reset by the spring.
Operating principle of the pilot piston-type solenoid valve
Often open: when the solenoid valve coil is energized, the solenoid core is closed, the pressure relief hole is closed, the main piston of the solenoid valve is pushed by the medium pressure, the main valve port is closed, and the medium is closed.
When the solenoid valve coil is powered off, the main solenoid valve port opens and the medium flows through.
Regular closed: when the solenoid valve coil is energized, the solenoid core suction, the pressure relief hole opens, the solenoid valve main piston driven by the medium pressure, open the main valve port, medium circulation.
When the solenoid valve coil is powered off, the main solenoid valve port is closed and the medium is closed.
Operating principle of the double-coil self-holding solenoid valve
When the self-holding solenoid valve no. 1 coil is not energized, the no. 2 coil within 3 seconds after energizing, the self-holding solenoid valve is closed;
When the self-holding solenoid valve no. 2 coil is not electrified, the no. 1 coil is cut off within 3 seconds after the electrification, and the self-holding solenoid valve is opened.
