Performance test of pneumatic valves:

1.1 a valve specifications and batch manufacturing, authoritative institutions entrusted to test the performance of the following:

(1) the valve open-close torque under working pressure conditions;

(2) under working pressure conditions, to make sure that the continuous opening and closing the valve closed tight times;

(3) the flow resistance coefficient of valve in the pipeline condition detection.

1.2 the valve should be done before they go out the following tests:

Valve (1) under open conditions, the body should be 2 times the internal pressure of valve working pressure value detection;

(2) the closing of the valve, both sides respectively under 1.1 times work pressure valve value, no leakage; But the metal sealing butterfly valve, leakage nor a value greater than the related requirement.