The quality of the product is very important while the large-scale work of the national standard check valve produced by Daejeon Valve is carried out. Let the national standard check valve operate normally is the guarantee of continuous work. If you are in leisure, you can pass the quality inspection of the check valve through various test methods to achieve the purpose of safe work. So how is the check valve detected?
We generally divide the simplest method of detecting a check valve into three steps:
Open the check valve passage, fill the valve cavity with water (or kerosene), and increase the pressure required for the strength test to check the valve body, bonnet, gasket and packing for leakage.
Close the dead valve, pressurize to the nominal pressure on the check valve side, and check for leaks from the other side.
Reverse the check valve and test the opposite side. Through the above three simple steps, it can be analyzed whether the basic working state of the check valve is abnormal.
Of course, there are more complicated test methods. The methods pointed out below are for more complex potential problems. The steps can be basically divided into two steps:
Check valve test pressure nominal pressure from 0.4Mpa-32Mpa, these common pressure valves, valve strength test pressure is 1.5 times its nominal pressure. The valve seal test pressure is equal to 1.1 times the nominal pressure.
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