1. All parts of the butterfly valve, whether manual, pneumatic, hydraulic, or electric, are strictly debugged before leaving the factory. When rechecking the sealing performance, the user should fix both sides of the inlet and outlet evenly, close the butterfly valve, and apply pressure to the inlet side. Observe whether there is any leakage on the outlet side. Before the strength test of the pipeline, the butterfly plate should be opened to prevent damage to the sealing pair.
2. Although the pneumatic butterfly valve has been strictly inspected and tested before leaving the factory, there are some products that automatically change the screw position during transportation, and need to be re-adjusted, pneumatically, hydraulically, etc., please read the instruction manual of the supporting drive device.
3. The opening and closing stroke of the control mechanism has been adjusted when the electric drive butterfly valve leaves the factory. In order to prevent the wrong direction when the power is turned on, the user first turns on the power manually to the half-open position after turning on the power for the first time, and then presses the electric switch to check that the direction of the indicator plate is consistent with the closing direction of the valve.