It is of great importance to equip the valve body with high strength. With defects in valve body, unexpected economic losses may occur someday after they are put in place. What’s more, it may put a period to the whole working system and take a exorbitant cost from the company, even the public.

When it comes to material outputting, media leakage is not allowed., so do other defects like cracks, loose pores, slags to the body, cover and other parts. Besides that, to ensure the perfect performance of these apparatus, valve producers have to do do strength test to every valve.

After all parts of the vale are assembled, the integrated piece will be send to do strength test. Usually, after rough machining, rough quality blanks and heat treated components will do intermediate strength test to spare unnecessary waste carried by all kinds of test failures. If all indicators are normal, further test are saved only if users insist..

The body strength tests are usually conducted under general temperature. And the testing pressure will be set 1.25 to 1.5 times higher than the nominal pressure. Valves are going to prove strong enough to pass the exam as long as these is no leakage within the allowed range. Another thing worth to be keep in mind is that air in the cavity should be output if the outputting material is water.

Those above speak loudly that strength test id of great meanings and values. You could never assure its quality when its not strong enough. Therefore it is sure that the strength test is and will be the most important project in the valve producing field.