Do pneumatic ball valves need to be pressure-tested?
Thread Content
According to 3518, is it necessary to conduct valve testing on pneumatic ball valves? Are there any friends who work in engineering?
Is it necessary to conduct a housing test similar to that for manual ball valves?
Whether it is a manual valve or a pneumatic valve, pressure testing of the housing and testing of the seat seal are necessary to be carried out before leaving the factory.
Self-control valves such as pneumatic valves require various tests to be carried out in the factory; they do not participate in any testing on the pipeline site. They are installed or reset only after the pipeline cleaning is completed. As a result, higher standards are applied to them, and any quality issues are not tolerated. That is why their price is also very high
Whether it is a pneumatic valve or a manual valve, they must undergo pressure testing before leaving the factory of the valve manufacturer, and only after passing such testing will they be released. However, some companies with strict requirements will also conduct random pressure tests on the valves after receiving them. It depends on how strict your company’s requirements in this regard are
Actually, the difference between manual valves and pneumatic valves is that pneumatic valves have an additional actuator compared to manual valves; however, they remain valves in essence, and all pressure testing requirements are the same. Both types must undergo shell pressure testing (at 1.5 times the nominal pressure) as well as sealing pressure testing (at 1.1 times the nominal pressure for high-pressure water, and at 0.6 MPa for low-pressure air). I’m not sure if you understand what I’m saying