Working principle of pneumatic hydraulic solenoid valve

Two position three-way solenoid valves are usually used in conjunction with single acting pneumatic actuators. Two position three-way valves have two controllable positions: on/off, and three-way valves have three channels for ventilation. Generally, one channel is connected to the air source, and the other two channels are connected to the inlet and outlet of the actuator. The specific working principle can refer to the working principle diagram of single acting pneumatic actuators.The main Solenoid Valve product names of China Magnetic Valve Network include:231Y Series Water(hot-water) Gas Three-way Solenoid Valve,，ADF Ammonia Magnetic Valve,Cryogenic Magnetic Valve,Chemical Magnetic Valve,DFD Liquid Gas Magnetic Valve,DFD-J Series Liquid Gas Stainless Steel Magnetic Valve,DF(ZCS) Magnetic Valve, For LiquidDF-A Magnetic Valve

Two position five way solenoid valves are usually used in conjunction with double acting pneumatic actuators, with two positions controllable: on-off. Five way valves have five channels for ventilation, with one connected to the air source, two connected to the inlet and outlet of the external chamber of the double acting cylinder, and two connected to the inlet and outlet of the internal chamber. The specific working principle can refer to the working principle of double acting pneumatic actuators

In terms of gas (or liquid) circuits, two three-way solenoid valves have one inlet (connected to the gas source), one outlet (provided to the target device's gas source), and one exhaust port (usually equipped with a muffler, but can be omitted if noise is not a concern). Two five way solenoid valves have one inlet hole (connected to the air source), one forward acting air hole, and one reverse acting air hole (providing one forward and one reverse acting air source to the target device respectively), one forward acting exhaust hole, and one reverse acting exhaust hole (equipped with a muffler).

For small automatic control equipment, industrial rubber hoses with a diameter of 8-12mm are generally used for the air pipes. In electrical terms, two position three-way solenoid valves are generally single controlled (i.e. single coil), while two position four-way solenoid valves are generally dual controlled (i.e. dual coil). The voltage level of the coil is generally DC24V, AC220V, etc. Two position three-way solenoid valves are divided into two types: normally closed and normally open. The normally closed type refers to the air circuit being disconnected when the coil is not powered, while the normally open type refers to the air circuit being connected when the coil is not powered. The operating principle of a normally closed two position three-way solenoid valve is to energize the coil and connect the air circuit. Once the coil is powered off, the air circuit will be disconnected, which is equivalent to "inching". The operating principle of a normally open two position three-way single electric control solenoid valve is: when the coil is energized, the air circuit is disconnected. Once the coil is de energized, the air circuit will be connected, which is also called "inching". The principle of action of two five way dual electric control solenoid valves: When the positive action coil is energized, the positive action air circuit is connected (there is air in the positive action air hole). Even if the positive action coil is powered off, the positive action air circuit is still connected and will be maintained until the reverse action coil is energized. If the reverse action coil is powered on, the reverse action air path will be connected (there is air in the reverse action air hole). Even if the reverse action coil is powered off, the reverse action air path will still be connected and will be maintained until the positive action coil is powered on. This is equivalent to 'self-locking'. Based on the characteristic of two five way dual electric control solenoid valves, when designing electromechanical control circuits or programming PLC programs, the solenoid valve coil can be operated for 1-2 seconds to protect it from damage.

Electromagnetic valves are used in liquid circuit systems to achieve the on/off of liquid circuits or changes in the direction of liquid flow. They generally have a valve core that can slide under the electromagnetic force of a coil. When the valve core is in different positions, the path of the electromagnetic valve is also different. There are several working positions of the valve core, and this solenoid valve is called a multi position solenoid valve: the interface on the valve body, which is the number of passages of the solenoid valve, has several passages, and this solenoid valve is called a multi way solenoid valve. After the installation of the solenoid valve, generally all interfaces should be connected, and the so-called working position refers to the position of the valve core. The valve core is in position A when the coil is not powered, and in position B when the coil is powered. When the valve core is in different positions, it plays a role in connecting or closing various interfaces.

Two position solenoid valve refers to the valve core of the solenoid valve having two different working positions (open and closed). Two way and three-way solenoid valves refer to the two or three channel ports on the valve body of the solenoid valve; For example, a two position two-way solenoid valve has one inlet and one outlet (two channels, the most common). A two position three-way solenoid valve controls the liquid to have one inlet and two outlets (one normally open and the other normally closed)

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