Valve Performance Testing Requirements

1. When a valve of a certain specification is manufactured in batches, an official agency should be entrusted to conduct the following performance testing: ① The opening and closing torque of the valve under working pressure conditions; ② The detection of the flow resistance coefficient of the valve under pipeline water transmission conditions.
2. The valve should undergo the following tests before leaving the factory: ① When the valve is open, the valve body should withstand an internal pressure test that is twice the valve working pressure; ② When the valve is closed, both sides of the valve should withstand 11 times the valve working pressure. value, no leakage; but for metal-sealed butterfly valves, the leakage value is not greater than the relevant requirements.