Automatic valve common fault

Automatic valve failure and prevention methods: 1, one of the spring-type safety valve failure, sealing surface leakage. The reasons are: â‘  between the sealing surface debris; â‘¡ sealing surface damage. This failure to rely on regular maintenance to prevent. Fault two, the sensitivity is not high. The reasons are: â‘  spring fatigue; â‘¡ spring improper use. Spring fatigue, no doubt should be replaced. Spring misuse, the user does not pay attention to a nominal pressure spring-loaded safety valve, there are several pressure sections, each pressure section has a corresponding spring. Such as the nominal pressure of 16 kg / cm 2 of the safety valve, the use of pressure is 2.5 ~ 4 kg / cm pressure section, the installation of 10 to 16 kg / cm 2 of the spring, although also make do with open, but suddenly high and low Very insensitive. 2, check valve common faults are: â‘  valve broken; â‘¡ media backwards. Caused by the valve is broken because: before and after the check valve medium pressure is close to balance and mutual "see-saw" state, the valve flap often flap and some brittle materials (such as cast iron, brass, etc.) made of Disc is broken. Prevention is to use the valve for the tough material check valve. The reasons for the media back flow are: â‘  sealing surface damage; â‘¡ clip into the impurities. Repair the sealing surface and remove impurities to prevent backflow. The above descriptions of common faults and prevention methods can only serve as a stimulating effect. In actual use, other faults may also be encountered. In order to prevent the occurrence of valve faults actively and flexibly, the most fundamental one is to be familiar with its structure, Material and action principle. This article Keywords: valve

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