Introduction to the working principle of the pilot piston solenoid valve

The working principle of the pilot piston solenoid valve is mainly divided into two types: normally open (energized off) and normally closed (energized on). To understand the working principle of this solenoid valve, it is necessary to know the internal pressure relief hole and the main piston. The working principle is as follows:
Normally closed: When the coil is energized, the electromagnet core is sucked, the pressure relief hole is opened, the main piston medium pressure is pushed, the main valve port is opened, and the medium is circulated. When the coil is de-energized, the main valve port is closed and the medium is cut off.
Normally open: When the coil is energized, the electromagnet core is sucked, the pressure relief hole is closed, the main piston is pushed by the medium pressure, the main valve port is closed, and the medium is cut off. When the coil is de-energized, the main valve port opens and the medium circulates.
note:
1. Pilot-operated piston solenoid valve requires that the medium passing through the solenoid valve must have pressure (the medium has no pressure and is not suitable for this valve). The solenoid valve on our side is to ensure that the medium has a pressure of 0.1 kg. jobs.
2. There are two sources of force for opening the main piston of the pilot piston solenoid valve. One is the magnetic force generated after energization, and the second is the pressure of the medium.
These two forces must exist at the same time to ensure the normal operation of the pilot piston solenoid valve.