What is a solenoid valve and how to use a solenoid valve? First of all, before introducing the selection of electromagnetic valve, we first look at what is the point power. What is the role of the solenoid valve? Let's see what is the solenoid valve. The use and role of solenoid valve Solenoid valves are electromagnetically controlled industrial equipment used in industrial control systems to adjust the direction, flow, speed, and other parameters of the media. The burner solenoid valve is controlled by the electromagnetic effect. The main control method is controlled by the relay. In this way, the solenoid valve can cooperate with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed. Solenoid valve classification and control There are many kinds of solenoid valves. Different solenoid valves play a role in different positions of the control system. The more commonly used ones are one-way valves, safety valves, direction control valves, and speed control valves. Solenoid valves are electromagnetically controlled industrial equipment. Adjust the direction, flow, speed, and other parameters of the media in an industrial control system. The solenoid valve is controlled by the electromagnetic effect. The main control method is controlled by the relay. In this way, the solenoid valve can be used with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed, there are many kinds of solenoid valves, different solenoid valves play a role in different locations of the control system, the more commonly used is single Directional valves, safety valves, directional control valves, speed control valves, etc. The performance of the solenoid valve can be simply divided into i applicability, reliability, safety, economy, solenoid valve style can be divided into direct-acting, step-by-step direct-acting, and indirect pilot-type, to help understand these, Know how to buy a solenoid valve, how to use a solenoid valve. Below we make a simple analysis of the above points. What is a solenoid valve and how to use a solenoid valve? applicability? The fluid in the pipeline must be the same as the calibration medium in the selected solenoid valve series model. The fluid temperature must be less than the calibration temperature of the selected solenoid valve. The solenoid valve fluid viscosity is generally below 20CST. If the lower pressure difference is greater than 0.04MPa, pilot type (differential pressure) electromagnetic valve can be used; the higher working pressure difference should be less than the larger calibration pressure of the electromagnetic valve. The general solenoid valve is one-way work, so pay attention to whether there is back pressure difference, if there is a check valve installed, the fluid cleanliness is not high when the filter should be installed in front of the solenoid valve, the general requirements of the solenoid valve on the media cleanliness is better , Pay attention to the flow aperture and the nozzle diameter; solenoid valve is generally only two control switch; conditions allow to install the bypass pipe, easy maintenance; water hammer to customize the solenoid valve opening and closing time adjustment, pay attention to the ambient temperature of the solenoid valve Impact, power supply current and power consumption should be selected based on the output capacity. The power supply voltage is generally allowed to be ±10%. It must be noted that the VA value at the time of AC start is higher. reliability Solenoid valve is divided into two types: normally closed and normally open; Normally selected is normally closed type, Lija Road burner is powered on, and power off is closed; but normally open type is used when the open time is very long and closed. The life test is generally belonged to the factory. Type test projects, to be exact, there are no professional standards for solenoid valves in the country, so use caution when selecting solenoid valve manufacturers. When the operation time is very short, the direct-acting type is generally selected and the large-caliber selection is used for the fast series. safety General electromagnetic valve is not waterproof, please use waterproof type when the conditions are not allowed, the factory can be customized, the higher nominal pressure of the solenoid valve must exceed the higher pressure in the pipeline, otherwise the service life will be shortened or have other unexpected circumstances, Corrosive liquids should be made of all-stainless steel, and strong corrosive fluids should use plastic king (SLF) solenoid valves. Explosion-proof products must be selected for the destructive environment of the Biohit burner. Economical There are many solenoid valves that can be used universally, but more economical products should be used based on the above three points. What is a solenoid valve and how to use a solenoid valve? Direct acting solenoid valve There are two types, normally closed and normally open. Normally closed type when the power is off, when the coil is energized, electromagnetic force is generated, so that the moving core overcomes the spring force and the static iron core directly opens the valve and the medium is the passage; when the coil is powered off, the electromagnetic force disappears, and the moving iron disappears. The core is reset under the action of the spring force, and the valve port is closed directly, and the medium is blocked. Simple structure, reliable operation, normal operation under zero differential pressure and micro vacuum. Normally open type is the opposite. If less than φ6 flow path solenoid valve. Step-by-step direct-acting solenoid valve The valve adopts one-time valve opening and secondary valve opening in one body. The main valve and the pilot valve step by step make the electromagnetic force and pressure difference directly open the main valve port. When the coil is energized, an electromagnetic force is generated to cause the moving iron core and the static iron core to pull in. The pilot valve port is opened and the pilot valve port is disposed on the main valve port, and the moving iron core is connected with the main valve core. At this time, the main valve is The pressure of the chamber is unloaded through the pilot valve port. Under the action of pressure difference and electromagnetic force, the main valve core moves up and the main valve medium is opened to circulate. When the coil is de-energized, the electromagnetic force disappears. The power core closes the main valve under the action of its own weight, spring return and pressure, and the medium is cut off. Reasonable structure, reliable operation, reliable operation at zero differential pressure, and reliable operation at zero differential pressure. Indirect pilot solenoid valve The series solenoid valve is formed by the combination of the pilot valve and the main valve core to form a channel; the normally closed type of the Weishasu burner is closed when it is not energized. When the coil is energized, the generated magnetic force causes the moving iron core and the static iron core to pull in, the pilot valve opening is opened, and the medium flows toward the outlet. At this time, the pressure of the upper valve of the main valve spool decreases, which is lower than the pressure of the inlet side to form a pressure difference. The resistance of the spring moves upwards to achieve the purpose of opening the main valve, and the medium circulates. When the coil is de-energized, the magnetic force disappears and the moving iron core moves down under the action of the spring force, closing the main valve port. The normally open principle is just the opposite.
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