The installation details of these 10 solenoid valves cannot be ignored

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Solenoids, used in combination with cylinders, are widely applied in industrial settings. This post summarizes 10 installation details for solenoids for use by instrument technicians, to help them install them correctly, extend their service life as much as possible, and improve the reliability of pneumatic systems. Before discussing the details of solenoid valve installation, let’s first take a look at the sealing structure inside the solenoid valve. As can be seen from the diagram below, if impurities get into the solenoid valve, it will lead to poor performance of the valve or accelerated wear of the sealing surfaces, which in turn affects the valve’s functionality and reliability. The experience in installing solenoid valves shared by Changhui Instruments comes from field applications of solenoid valves in various industries, and all of it is related to cleanliness. http://yunrun.com.cn/upload/201910/31/201910310108000294.png Solenoid valve: yunrun.com.cn/tech/2764.html 1. Please install a filter in front of the solenoid valve to prevent impurities such as iron shavings and sealing materials from entering it. 2. For solenoid valves with metal seals, it is necessary to install a filter with a filtration accuracy of 5μm or lower after the air compressor, in order to prevent impurities such as carbon powder generated by the air compressor from entering the solenoid valve. 3. Before using the solenoid valve, be sure to purge the installation piping. 4. When installing the air supply pipe for the solenoid valve, make sure to leave 2 threads at the end of the thread to prevent sealing material from entering the pipe. 5. For ease of maintenance, please leave space for disassembly and maintenance when installing the solenoid valve, to facilitate its maintenance and removal during use. 6. When using a three-position center-sealed solenoid valve, it is necessary to consider not only the leakage of the solenoid valve itself but also the leakage at the pipe connections, speed control valves, cylinders, and so on. A leak from the exhaust port of a solenoid valve is not necessarily due to a leak in the solenoid valve itself; it could also be caused by a leak at the piston seal of the cylinder. Instrument technicians should pay attention to this detail when servicing solenoid valves. 7. The lubricating oil used for solenoid valves is 1# or 2# turbine oil (ISO VG32). Bearing lubricants and mechanical lubricants should not be used, as such oils can cause seals made of materials such as NBR to expand and deform, resulting in poor performance of the solenoid valve. 8. When using the pilot solenoid valve, be careful not to apply throttling on the primary side, to prevent excessive pressure drops that could cause incorrect operation of the valve spool. 9. Pay attention to the installation direction of the solenoid valve to prevent accidental activation due to vibrations. 10. After installing the solenoid valve and connecting the piping, be sure to clean the piping to prevent foreign objects and rust particles generated during piping from causing poor operation of the solenoid valve.