1. Defa should be kept dry before installation and not stored in the open air.
2. Check the pipeline before installing the butterfly valve to ensure that there is no foreign matter such as welding slag in the pipeline.
3. 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.
4. The flange specifications for butterfly valve connection are correct, and the pipe clamp flange conforms to the butterfly valve flange standard. It is recommended to use butterfly valve flanges instead of flat welding flanges.
5. Confirm that the flange welding is correct. After the butterfly valve is installed, the flange must not be welded to avoid scalding the rubber parts.
6. The installed pipe flange should be centered and centered with the inserted butterfly valve.
7. Install all flange bolts and tighten them by hand. It will be confirmed that the butterfly valve and the flange have been aligned, and then the butterfly valve will be opened and closed carefully to ensure flexible opening and closing.
8. Fully open the valve. Use a wrench to tighten the bolts in diagonal order. No washers are needed. Do not overtighten the bolts to prevent serious deformation of the valve ring and excessive opening and closing torque.
