Performance Testing Requirements For Valves

1. When manufacturing a certain specification of valve in bulk, an official agency should be entrusted to conduct the following performance tests: ① the opening and closing torque of the valve under working pressure; ② Detection of flow resistance coefficient of valves under pipeline water delivery conditions.
2. Before leaving the factory, valves should undergo the following tests: ① When the valve is in an open state, the valve body should withstand an internal pressure test of twice the working pressure value of the valve; ② When the valve is closed, both sides bear 11 times the working pressure of the valve, without leakage; But for metal sealed butterfly valves, the leakage value should not exceed the relevant requirements.