Solenoid valve with electromagnetic control of industrial equipment, isused to control fluid automation infrastructure components, to implement,not limited to hydraulic, pneumatic. By adjusting the medium in industrial control system, flow direction, speed and other parameters, can ensure the control precision and flexibility, the solenoid valve solenoid valve coilwhich plays a key role. There are many kinds of solenoid valve, solenoid valve does not play a role in the control system of the different range, is the most commonly used one-way valve, safety valve, control valve,speed control valve, hydraulic solenoid valve is not limited to.
     Hydraulic solenoid valve is a basic component in automatic flow control,to implement. Hydraulic solenoid valve used to control the direction ofhydraulic machinery and equipment factory activity, is generally controlled by the hydraulic cylinder, so it will use hydraulic solenoid valve.
    Solenoid valve in a closed chamber, in different directions are provided with through holes, each hole is connected with the pipe cavity base isnot the same, the piston is two, double solenoid valve coil, the magnet coils body by controlling the signal interaction, to open or close the oil drain hole is not the same as with mobile control valve, and the oil inlet hole Shichang opened, hydraulic oil enters the oil outlet pipe is not the same, then the oil pressure to push the piston cylinder, piston andpiston rod piston rod of the femoral artery, femoral artery and mechanical gear. This control solenoid current on-off control of the mechanical movement.

     

     From the principle of electromagnetic valve is divided into three categories:
Direct acting solenoid valve

Principle: power, the electromagnetic coil of electromagnetic attack force to lift off pieces, from the seat on the valve open; power, the electromagnetic force disappears, the spring pressure to close the file on the seat, the valve closed.

Features: in a vacuum, negative pressure, zero pressure can work, but the path is generally not more than 25mm.

Step direct acting solenoid valve
 

Principle: it is the principle of a direct acting and pilot combination, when the import and export no pressure, the power, the electromagnetic force directly to the pilot valve and main valve off pieces turn upward, open the valve. When the import and export reached the start pressure, the power,the electromagnetic force pilot valve, main valve chamber under increased pressure, the chamber pressure drops, and then use thepressure to push up the main valve; power, the pilot valve with a spring or to medium pressure to promote the closure of parts moving down, the valve closes.

Features: zero pressure or vacuum, high pressure can also be * action,but the power is larger, need to have the necessary level of equipment.

Pilot solenoid valve
 

Principle: power, the electromagnetic force to open the pilot hole, the chamber pressure sensitive decline, was closed around on the lower of high pressure, fluid pressure to promote the closure of parts moving up,the valve open; power, the spring force of the pilot hole closed, the inlet pressure chamber through the bypass valve off on Kong Lingmin arounda low on the high pressure, fluid pressure to promote the closure of parts moving down, close the valve.

Features: fluid pressure limit can be arbitrarily high planning, equipment(custom) but it is necessary to satisfy the conditions of fluid pressure.

2, solenoid valve from the valve structure and materials of the differenceis not the same as the principle, divided into six branch categories:diaphragm structure, step by step direct acting diaphragm structure, pilotdiaphragm structure, direct acting piston structure, direct acting piston structure step by step, the pilot piston direct drive structure.

3, solenoid valve in accordance with the function of classification: water solenoid valve, steam solenoid valve, solenoid valve, cryogenic solenoid valve, gas solenoid valve, solenoid valve, solenoid valve, ammonia gassolenoid valve, liquid solenoid valve, miniature electromagnetic valve,pulse electromagnetic valve, hydraulic solenoid valve normally open solenoid valve, oil solenoid valve, solenoid valve, DC high pressure solenoid valve, explosion-proof solenoid valve etc..

    A hydraulic solenoid valve type, different manufacturers of different types of arrangement, such as 34BYM-L20H-T, which is 3 34 mark 4, B AC, Yhydraulic, M slide valve function of L marked the thread connection way,20, the nominal diameter, nominal pressure H, H standard for high voltage 31.5MPA, T marked the spring on the medium code. Want moredetailed type of meaning, can consult the relevant manufacturers.

1, by use of pressure control valve can be divided into relief valve,pressure relief valve and sequence valve.