The core steps of testing the function of a check valve include: sealing performance test, opening and closing test, pressure level test and reverse flow test. These tests are designed to ensure that the check valve can work properly under various working conditions and prevent fluid backflow.
First, the sealing performance test verifies whether there is good sealing between the valve disc and the valve seat, and checks for leakage by applying a certain pressure. If there is leakage, the seal may need to be replaced or the valve adjusted.
Second, the opening and closing test checks the reaction speed and sensitivity of the valve under fluid passage and reverse flow conditions to ensure that it can respond quickly in actual applications.
The pressure level test ensures that the valve can withstand the maximum working pressure of the system, which is the key to ensure that the valve can work properly under high pressure.
Finally, the reverse flow test simulates the reverse flow situation, checks the check effect of the check valve, and ensures that the valve can be reliably closed during reverse flow.
In addition, there are some auxiliary test items, such as appearance inspection, dimensional accuracy test, flow channel patency test, material compatibility test and durability test, which help to comprehensively evaluate the performance and reliability of the check valve.