北京华泰辉阀门有限公司

Imported explosion-proof solenoid valve
The function of the imported explosion-proof solenoid valve The coil shell of the explosion-proof solenoid valve not only has the explosion-proof function of withstanding the gas explosion pressure, but also has a blocking effect on the transmission of gas explosion energy, and has higher safety performance . It is a series of special solenoid valves specially designed for transmitting flammable and explosive media or used in explosive hazardous locations. Solenoid valves with different explosion-proof levels should be selected for different environments and fluids.
Working principle of imported explosion-proof solenoid valve The solenoid valve has a closed cavity with through holes at different positions. Each hole leads to a different oil pipe. There is a valve in the middle of the cavity and two electromagnets on both sides. Which side When the magnet coil is energized, the valve body will be attracted to which side, and the movement of the valve body is controlled to block or leak different oil drain holes. The oil inlet hole is normally open, and the hydraulic oil will enter different oil drain pipes. , and then the oil pressure drives the oil-rigged piston, which in turn drives the piston rod, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current of the electromagnet.
Direct-acting solenoid valve
Principle When energized, the solenoid coil generates electromagnetic force to lift the closing member from the valve seat. When the valve is opened and powered off, the electromagnetic force disappears and the spring presses the closing member against the valve seat. , the valve is closed.
Features: It can work normally under vacuum and negative pressure, but the diameter generally does not exceed.
Distributed direct-acting solenoid valve
Principle It is a principle that combines direct-acting and pilot-operated. When there is no pressure difference between the inlet and outlet, after power is turned on, the electromagnetic force directly connects the pilot small valve and the main valve. The valve closing parts are lifted upward in turn, and the valve opens. When the inlet and outlet reach the starting pressure difference, after power is turned on, the electromagnetic force pilots the small valve. The pressure in the lower chamber of the main valve increases and the pressure in the upper chamber decreases, thereby using the pressure difference to push the main valve upward. When the power is turned off, the pilot valve uses spring force Or the medium pressure pushes the closing member to move downward to close the valve.
Features: It can operate safely under zero pressure difference or vacuum high pressure, but the power is large and it must be installed horizontally.
Pilot-operated solenoid valve
Principle When energized, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber drops rapidly, forming an upper, lower, and higher pressure difference around the closing member. The fluid pressure pushes the closing member to move upward. When the valve is opened and powered off, the spring force closes the pilot hole. The inlet pressure quickly passes through the bypass hole and forms a pressure difference between the lower and upper parts around the valve closing part. The fluid pressure pushes the closing part downward to close the valve.
Features: The upper limit of the fluid pressure range is high, and it can be installed at will. It needs to be customized, but the fluid pressure difference condition must be met.
Advantages of imported explosion-proof solenoid valves
Explosion-proof solenoid valves have a long working life.
The working systems of explosion-proof solenoid valves are divided into three types: long-term working system, repeated short-time working system and short-time working system. Explosion-proof solenoid valves are all long-term working systems, that is, the coils are allowed to be energized for a long time. For situations where the valve is open for a long time and only closed for a short time, a normally open solenoid valve should be used. When used in short-time working systems and large batches, special orders can be made to reduce power consumption.
When the operating frequency of the explosion-proof solenoid valve is required to be high, the structure should be a direct-acting solenoid valve, and the power supply should be AC.
Parameters of imported explosion-proof solenoid valve
Applicable media: gas, water, oil, steam, refrigerant, corrosive fluids, except cast iron body
Applicable pressure ~
Medium temperature ~ Cast iron body is only suitable for ~
Customization is required when the medium viscosity is less than or greater
Protective performance
Explosion-proof mark Ⅱ
Wiring method Wiring seat type lead type
Valve body material stainless steel cast iron
Control method normally open Closed
Power supply voltage ~ ~
Connection method internal thread external thread flange
Zero leakage
Valve brand German R brand Beijing Huataihui valve