Like other fluid control equipment, the successful use of the valve depends on the user or the buyer to provide the details of the use of the site conditions. Without a valve supplier to say: "this valve is universal." Because the valve from the structure to the material vary widely, to make clear the use of the site in order to select the type of valve. In general, there are three reasons for the premature failure of the valve: corrosion, wear and thermal fatigue.
Media has a decisive influence on the valve selection. Fluid in some trace elements has a strong corrosive, some very dangerous, if ignoring the trace elements, compounds such as hydrogen sulfide and the like, and not suitable metal material selection, will shorten valve life; at the same time if the choice of the appropriate sealing mechanism, is likely to cause leakage of toxic substances. In addition, if the neglect of the fluid in the micro condensation of solids, the valve will increase the wear. Of circulating pump outlet check back valve laboratory tests showed that water adds 0.25% of gravel, valve wear rate will increase one times. So for the safe use of the valve, the fluid in the solid is a factor that can not be ignored.
Valve is also often because of thermal shock failure. Valve medium temperature swell and sag, hot and cold and can have a very high stress of the valve components, repeated thermal shock lead to valve material fatigue quickly, component failure, body cracking. Valve thermal fatigue problems with increasing pressure, the corresponding valve body wall thickness also increased.
Therefore, when the valve medium temperature change of hot, buyers must explain to supplier, otherwise, may cause valve safety. The correct operation of the valve life also has a great impact, there are surveys show that 50% of the valve damage caused by improper operation of the user. Lesson, future generations of teachers, not to mention valve damage caused by the production of huge losses, the light valve maintenance cost is very sad. According to the daily operation will save a lot of trouble. Hope that users can pay attention to avoid the above mentioned a few reasons to cause premature failure of the valve, so that the service life of the valve longer and more secure.
