1. During the use of pneumatic butterfly valve, it should always be kept clean. The transmission thread must be lubricated regularly. In case of any fault, it should stop using immediately and find out the cause to clear the fault.

2. The bolts of the packing gland shall be tightened evenly, and shall not be pressed into a skew state, so as to avoid being damaged and hindering the stem movement or causing leakage.

3. During installation, the valve can be directly installed on the pipeline according to the connection mode. In general, it can be installed at any position of the pipeline, but it needs to be convenient for operation and maintenance. Note that the medium flow direction of the stop valve should be upward under the longitudinal valve disc, and the lift check valve can only be installed horizontally.

4. When the pneumatic butterfly valve is used, it is only used for full opening or full closing, and it is not allowed to adjust the flow, so as to avoid erosion of the sealing surface and accelerated wear. The gate valve and upper thread stop valve are provided with back sealing device, and the hand wheel is screwed to the top position to prevent the medium from leaking from the packing.

5. Hand wheel shall be used for opening and closing of pneumatic butterfly valve. Do not use lever or other tools to avoid damage to valve parts. Turn the hand wheel clockwise to close, otherwise to open.