When a valve is manufactured in batches of a certain specification, an authoritative organization should be entrusted to carry out the following test:
Table of Content
Performance tests
Opening and closing torque of valve under working pressure
Under the condition of working pressure, the continuous opening and closing times of the valve can be guaranteed to be tightly closed.
Detection of the flow resistance coefficient of the valve under the condition of pipeline water delivery
Valve test before leaving the factory
When the valve is open, the valve body should withstand the internal pressure detection of twice the working pressure value of the valve.
When the valve is closed, both sides are subjected to 11 times the working pressure value of the valve, and there is no leakage; but the leakage value of the metal-sealed butterfly valve is not greater than the relevant requirements.