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difference between explosion-proof solenoid valve and common solenoid valve

Solenoid valve is an industrial equipment controlled by electromagnetism. It is an automatic basic component used to control fluid. It belongs to actuator, not limited to hydraulic and pneumatic. Adjust the direction, flow, speed and other parameters of the medium in the industrial control system. The solenoid valve can cooperate with different circuits to complete the desired control, and the control accuracy and flexibility can be guaranteed. There are many kinds of solenoid valves. Different solenoid valves work in different directions of the control system. The most commonly used ones are one-way valve, safety valve, directional control valve, speed control valve, etc.


Principle of explosion proof solenoid valve:


There are closed cavities in the solenoid valve. Through holes are opened in different directions. Each hole is connected with different oil pipes. The center of the cavity is the piston, and two electromagnets are on both sides. The valve body will be attracted to which side when the magnet coil is energized. The valve body can be opened or closed by manipulating the movement of the valve body. The oil inlet hole is normally open, and the hydraulic oil will enter into different oil drainage pipes and pass through it The oil pressure pushes the piston of the oil cylinder, which in turn drives the piston rod, which drives the mechanical equipment. In this way, the current of the electromagnet is turned off to control the mechanical movement.

GDQ Pneumatic High Vacuum Flapper Valve.jpg

Difference between explosion proof solenoid valve and general solenoid valve


The difference between the general solenoid valve and the anti riot solenoid valve is reflected in the junction box. The so-called anti riot means that the current caused by the electromagnetic head lock is not firm enough to ignite the corresponding environmental gas. In other words, the simple point is that the energy required by the action of the electromagnetic head is very dangerous when exposed to combustible gas.


The explosion-proof solenoid valve is to seal all parts of the equipment that may ignite explosive gas mixture in a shell. The shell can withstand the combustible mixture penetrating into the shell through any joint surface or structural vacancy of the shell without damage, and will not cause the ignition of the explosive environment formed by one or more gases or vapors The parts for spark, arc and dangerous temperature are put into the flameproof enclosure, which separates the internal space of the equipment from the surrounding environment. Due to the breathing effect and gas permeation effect of electrical equipment, there may be explosive gas mixture inside the flameproof enclosure.


1、 Explosion proof solenoid valve has long service life.


2、 Explosion proof solenoid valve operation system: divided into long-term operation system, repeated short-term operation system and short-term operation system. Explosion proof solenoid valves are long-term operation system, that is, the coil allows long-term power on operation. For long-term valve registration only needs short-term closure, the normally open solenoid valve should be selected. When it is used in short-time operation and large batch, special order can be made to reduce power consumption.


3、 Operating frequency of explosion-proof solenoid valve: when the operation frequency is required to be high, the structure of direct acting solenoid valve shall be preferred, and the power supply shall be preferred for communication.


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