As the electric butterfly valve has been used in the market for many years, the packing is mainly asbestos packing or graphite packing or PTFE V-type packing. These packing will be limited by the valve and subject to a factor. In the process of using the electric butterfly valve, the packing will be worn and the gap will increase with the increase of use times, and the increase of control times will lead to the wear of the packing in the valve, As a result of leakage and other problems, we need to replace the packing or reduce the wear caused by the opening and closing quantity. When selecting the packing, we need to pay attention to the advantages of each packing and choose the appropriate one. Ensure that the packing is compacted to achieve a hard and dense effect without being affected when the packing is worn and consumed. Using this method requires irregular inspection and maintenance of fillers, construction wear, etc.

The butterfly plate of the butterfly valve shall be installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis with a rotation angle of 0 ° - 90 °. When it rotates to 90 °, the valve is fully open. The butterfly valve is simple in structure, small in size and light in weight, and only consists of a few parts. The valve can be quickly opened and closed only by rotating 90 °, which is simple to operate. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has good flow control characteristics.