The butterfly valve is normally 90 ° from fully open to fully closed? The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. And it can be quickly opened and closed only by rotating 90 °, which is simple to operate? The opening and closing parts of the gate valve are the gate, and the movement direction of the gate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed?,? Adjustment and throttling are not allowed. The gate has two sealing surfaces. The advantages of the gate valve are: small fluid resistance, less effort in opening and closing, unrestricted medium flow direction, no flow disturbance and no pressure reduction

Test and adjustment of pneumatic butterfly valve
1. The manual, pneumatic, hydraulic and electric parts of butterfly valve have been strictly debugged before leaving the factory. When rechecking the sealing performance, the user should evenly fix both sides of the inlet and outlet, close the butterfly valve, apply pressure to the inlet side, and observe whether there is leakage at the outlet side. Before the strength test of the pipeline, the disc should be opened to prevent damage to the sealing pair.
2. Although the pneumatic butterfly valve has been strictly inspected and tested before delivery, some products have automatic screw displacement during transportation, which requires readjustment, pneumatic, hydraulic, etc. Please read the operating instructions of the supporting drive device.
3. The electric drive butterfly valve has adjusted the opening and closing travel of the control mechanism before delivery. In order to prevent the power supply from being connected in the wrong direction, after the first power supply is connected, the user should first turn on the manual switch to the half open position, and then press the electric switch to check that the direction of the indicator plate is consistent with the closing direction of the valve.