Automatic valve

A.Spring safety valve

One failure, the sealing surface leakage. Reasons: ① sealing surface is sandwiched between the debris; ② sealing surface damage.

This failure to rely on regular maintenance to prevent. The second failure, the sensitivity is not high. Reasons: ① spring fatigue; ② springs used improperly.

Spring fatigue, no doubt, should be replaced. Springs used improperly, is one kind of user inadvertently spring safety valve nominal pressure, there are several pressure segments, each segment there is a corresponding one pressure spring. If the nominal pressure of 16 kg / cm 2 safety valve, working pressure is 2.5 to 4 kg / cm 2 pressure section, the installation of 10 to 16 kg / cm 2, spring, though it can improvise on, but fluctuated , very sensitive.

B.Check Valve

Common faults are: ① disc break; ② media back.

Causing the valve to do broken because: medium pressure valve before and after yet another is close to balance, "see-saw" state, the valve and valve seat do often beat, some brittle materials (such as cast iron, brass, etc.) made valve's Office was shattered. Prevention approach is the use of valve do as ductile material valve.

Medium back of reasons: ① sealing surface damage; ② sandwiched impurities. Fix the sealing surface and remove impurities, will be able to prevent backflow.

More about the common faults and prevention of the narrative, can only play a stimulating, practical use, will encounter other problems, to be flexible and proactive in preventing the occurrence of valve failure, the most fundamental one is familiar with its structure, materials and operation principle.

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve