Installation requirements for pneumatic butterfly valves:

 

1. Before installation, check that all parts of the butterfly valve are intact, the model is correct, there are no impurities in the valve body, and there are no blockages in the solenoid valve and muffler

 

2. Place both the valve and cylinder in the closed position.

 

3. Install the cylinder onto the valve (either parallel or perpendicular to the valve body), and check if the screw holes are aligned without significant deviation. If there is a slight deviation, rotate the cylinder block slightly and tighten the screws.

 

4. After installation, the butterfly valve should be debugged (under normal circumstances, the gas supply pressure is 0.4~0.6MPa). During debugging and operation, the solenoid valve should be manually operated to open and close (the solenoid valve coil can only be operated manually after losing power), and the opening and closing of the butterfly valve should be observed. If it is found during the debugging process that the valve is struggling to open and close at the beginning, but then returns to normal, the cylinder stroke needs to be reduced (adjust the stroke adjustment screws at both ends of the cylinder inward at the same time, run the valve to the open position, and then turn off the air source before adjusting), until the valve opens and closes smoothly and without leakage. It should also be noted that the adjustable muffler can adjust the opening and closing speed of the valve, but it cannot be adjusted too small, otherwise it may cause the valve to not move.

 

5. Before installation, it should be kept dry and not stored outdoors

 

6. Before installing the butterfly valve, check the pipeline to ensure that there are no foreign objects such as welding slag inside the pipeline

 

7. The manual opening and closing resistance of the butterfly valve body is moderate, and the torque of the butterfly valve matches the torque of the selected actuator.

 

8. The flange specifications for butterfly valve connection are correct, and the pipeline clamp flange is consistent with the butterfly valve flange standard. It is recommended to use butterfly valve specific flanges and not flat welding flanges.

 

9. Confirm that the flange welding is correct. After the butterfly valve is installed, do not weld the flange again to avoid burning the rubber parts.

 

10. The installed pipeline flange should be aligned and aligned with the inserted butterfly valve.

 

11. Install all flange bolts and tighten them by hand to ensure that the butterfly valve is aligned with the flange. Then carefully open and close the butterfly valve to ensure flexible opening and closing.

 

12. Fully open the valve and tighten the bolts diagonally with a wrench, without the need for washers. Do not tighten the bolts too tightly to prevent severe deformation of the valve ring and excessive opening and closing torque.