Determination of the number of static pressure life tests for fluorine-lined butterfly valves

1. Termination of the test When the following conditions occur, the test should be terminated: 1. During the sealing test inspection, the sealing performance cannot meet the standard requirements; 2. The valve stem packing cannot keep the seal, and other parts of the valve body leak; 3. The valve of the gate valve Rod, stem nut and other parts are worn, and the opening and closing operation cannot be performed normally or the opening and closing operation torque changes greatly, which does not meet the requirements of Section 1. 2-8>. Second, the number of static pressure life tests 1. After reaching the required number of tests, when the performance of the gate valve meets the standard requirements, the number of tests is the number of static pressure life tests. 2. During the test, if abnormal conditions occur or the performance does not meet the standard requirements, the number of opening and closing cycles corresponding to the termination of the previous inspection shall be the number of static pressure life tests.
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