There are several types of solenoid valves. The meaning of the solenoid valve nameplate and the gas circuit assembly diagram

What is a solenoid valve? The solenoid valve is a control component that relies on the electromagnetic coil to generate electromagnetic force to drive the valve on/off to control the fluid. It is one of the commonly used actuators in the pipeline control process. The solenoid valve is an electromagnetic coil that generates magnetic attraction after being energized to overcome the pressure of the spring and drive the valve core to move. It has only one solenoid coil. It has a simple structure and is cheap. It can only realize switching. The solenoid valve is mainly used for on/off control of liquid and gas pipelines. It is a two-position DO control and is generally used for the control of small pipelines. There are several types of solenoid valves. There are many types of solenoid valves, which are divided into three categories in principle: direct-acting solenoid valves, step-direct-acting solenoid valves, and pilot-operated solenoid valves. Generally, the most commonly used ones are one-way valves, safety valves, directional control valves, speed regulating valves, etc. The following introduces the characteristics of different types of solenoid valves. The first type, direct-acting solenoid valve: when the power is on, the solenoid coil generates electromagnetic force to lift the closing member from the valve seat, and the valve opens;when the power is off, the electromagnetic force disappears, and the spring presses the closing member on the valve seat, and the valve closes. . The second type, step-by-step direct-acting solenoid valve: It is a principle that combines direct-acting and pilot-operated. When there is no pressure difference between the inlet and the outlet, after power is applied, the electromagnetic force directly pushes the pilot hole and the main valve piston upward in sequence. Lift up and the valve opens. When the inlet and outlet reach the starting pressure difference, after power is turned on, the electromagnetic force first opens the pilot hole, and the pressure in the upper chamber of the main valve piston drops, thereby using the pressure difference and electromagnetic force to pull the main piston, and the valve opens;when the power is turned off, it is closed by spring reset. The pilot hole pressurizes the upper chamber of the main piston, pushing the main piston downward to close the valve. The third type, pilot-operated solenoid valve: When energized, the electromagnetic force opens the pilot hole, and the pressure in the upper chamber of the main valve piston drops, forming an upper, lower, and higher pressure difference between the upper and lower chambers of the main piston. The fluid pressure pushes the main piston to move. The valve opens;when the power is off, the spring force closes the pilot hole, and the upper chamber of the main piston is pressurized, forming a pressure difference between the upper and lower chambers of the main piston. The fluid pressure and spring force push the main piston downward. Close the valve. The solenoid valve has its corresponding nameplate. Here is an example to introduce the meaning of the symbols on the solenoid valve nameplate: DC24V/AC110V is the input voltage, 50Hz/60Hz is the frequency, 6.0VA is the power of the coil 6W;Voltagerange is the voltage range;AMP. 58mA is the maximum Input current;Temp.rise35℃ refers to the temperature rise of 35 degrees Celsius;100% ED means that the coil can be powered on for 24 hours;IP refers to the protection level of the coil, 6 is dustproof, and 5 is waterproof. In industrial production control, pneumatic solenoid valves and cylinders are often used together. Take a double-acting cylinder as an example. It has two air chambers. Only one air chamber is ventilated during operation. The direction of the air source entering the air chamber is constantly switched. A two-position five-way solenoid valve can open and close the valve. When the solenoid valve is connected to the cylinder, P is connected to the air source, hole A is connected to the organ and the valve opening interface, and hole B is connected to the air pipe and the valve closing interface. In order to eliminate the noise generated during exhaust, a silencer can be used. on both vents. The picture below is the assembly diagram of the solenoid valve air circuit. You can use it after connecting it like this. The above is the introduction of several types of solenoid valves, the meaning of the solenoid valve nameplate and the content of the gas circuit assembly diagram. Shenwei Pneumatic is a professional manufacturer of solenoid valves. Customers are welcome to call for consultation.