Analysis of leakage of common direct actuated solenoid valve

In the case of leakage prevention, the structure and performance of the direct actuated solenoid valve is more reliable than the pilot solenoid valve. In practical application, the leakage of the direct actuated solenoid valve is one of the common failures. The leakage of the direct actuated solenoid valve is caused by the sealing face seal and the unsevere welding of the core component tube.
The direct actuated solenoid valve has its own advantages compared with the pilot solenoid valve. The design structure of the stepwise direct actuated solenoid valve is mainly to ensure the smooth lifting of the valve core, and to separate a part of the pressure by increasing the pilot hole in advance to solve the problem of insufficient suction of the solenoid valve core component. When a hole is added, the pilot type solenoid valve has a possibility of leakage.
Direct actuated solenoid valve
1. There are many kinds of elastic seal material, such as fluoro rubber, three ethylene propylene rubber, polytetrafluoroethylene, etc. but the chemical and physical properties of these materials will change. Therefore, in the long term use, the dissolution of the sealed material is also the important reason for the leakage of the direct actuated solenoid valve. 1.
2. The machining accuracy of elastic seal industry, its machining accuracy will have a greater impact on the stability of the work in operation. In general, if we want to produce high-precision solenoid valves, the rich experience of technicians and the input of production equipment are essential conditions. For direct actuated solenoid valves. Machining accuracy is usually the problem of size and size. This is also one of the reasons for the leakage of direct acting solenoid valves.
3, metal sealing contact surface processing precision and structure design metal seal contact surface processing precision will affect the leakage of the solenoid valve, some tiny particle dust, etc. will be attached to the metal contact surface, the time will cause leakage for a long time. In addition to the structure of the solenoid valve, the more reasonable structure of the solenoid valve will improve the efficiency of the solenoid valve. On the contrary, it will have a negative effect on the leakage of the solenoid valve, such as the unstable work of the solenoid valve and the leakage of the solenoid valve.
4. The welding valve core component of the direct moving solenoid valve core component is generally small, argon arc welding and laser welding are required to be high. One is to guarantee the capacity and the quality. Of course, this material is also required to be high, corrosive medium, and the oxidizing medium will cause corrosion at the welding place, and the air tightness is very large. Influence。