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Solenoid Medium Pressure
Sep 26, 2017

Solenoid valve is an industrial equipment controlled by electromagnetic control. It is an automatic basic component used to control the fluid. It belongs to the actuator and is not limited to hydraulic and pneumatic. Adjust the direction, flow, speed and other parameters of the medium in an industrial control system. The solenoid valve can cooperate with different circuits to achieve the expected control, and the control precision and flexibility can be guaranteed. There are many kinds of solenoid valves. Different solenoid valves play a role in different positions in the control system. The most common ones are one-way valve, safety valve, directional control valve, speed regulating valve and so on.

The working principle of

Solenoid valve has closed cavity, open a hole in different position, each hole to connect different tubing, cavity piston is among, both sides are two electromagnets, which face the magnet coil electricity body which side will be attracted to, through to control the movement of the valve to open or close the different discharge of oil hole, and the oil hole is always open, hydraulic fluid will enter the different oil drain, and then through the oil pressure to push the cylinder piston, piston drives the piston rod, piston rod drive mechanism. This controls the mechanical movement by controlling the electrical current of the electromagnet

The main classification

1. The electromagnetic valve is divided into three categories in principle:

Direct acting solenoid valve

Principle: when energized, the electromagnetic coil generates electromagnetic force to lift off the closing part from the seat and the valve opens; When the power is off, the electromagnetic force disappears and the spring closes the closing piece on the seat and the valve closes.

Features: it can work normally when vacuum, negative pressure and zero pressure, but not more than 25mm.

Step by step solenoid valve

Principle: it is a direct acting and pilot operated the principle of combining, when the inlet and outlet no pressure difference, after electrify, electromagnetic force directly to the pilot valve and main valve closed, in turn, lift, the valve opens. When the inlet and outlet reach the starting pressure difference, when the power is energized, the electromagnetism first pilot small valve, the pressure of the lower cavity of the main valve increases, the upper chamber pressure drops, so that the main valve is pushed up by the pressure difference; When the power is off, the pilot valve USES the spring force or medium pressure to push the closure, moving down and closing the valve.

Features: in zero pressure difference or vacuum, high pressure can also be the action, but the power is larger, the requirement must be installed horizontally.

Pilot solenoid valve

Principle: electricity, electromagnetic force open the pilot hole, the chamber pressure drops rapidly, in closed form around the high low differential pressure, fluid pressure push close up, the valve open; Power off, the spring force to close the guide hole, inlet pressure chamber through the by pass hole quickly in closing valve using a form around the high differential pressure, fluid pressure push close move down, close the valve.

Features: high fluid pressure range, optional installation (to be customized) but must meet the fluid pressure differential conditions.

2, electromagnetic valve from the valve structure and the differences between the different materials and principle, is divided into six branches small classes: straight moving membrane structure, membrane structure, the forerunner of moving step by step, straight moving piston structure, membrane structure step by step piston structure, the forerunner of moving piston structure.

Classified according to function 3, the electromagnetic valve: water solenoid valve, solenoid valve, solenoid valve, low temperature steam gas solenoid valve, solenoid valve, fire with solenoid valve, solenoid valve, ammonia gas solenoid valve, solenoid valve, liquid micro electromagnetic valve, electromagnetic pulse valve, hydraulic solenoid valve normally open solenoid valve, solenoid valve for oil use, dc electromagnetic valve, high pressure solenoid valve, explosion-proof solenoid valve, etc.

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