Why is the control picture of pneumatic aluminum alloy wafer butterfly valve fluctuating?

For the daily guarantee of butterfly valves, we should also pay attention to the situation of lubricating oil. Because butterfly valves are used frequently, the frequency of wear is relatively high. If we want to reduce these wear when using butterfly valves and have a longer service life, it is very important to drop lubricating oil every day for maintenance of butterfly valves. 　　

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Sixth, in the process of disassembly or reassembly, it must be ensured that the parts on the sealing surface of the valve are not damaged, especially the non-metallic parts, for example, when taking out the O-ring, professionals can use special tools; Seventh, the bolt installation on the flange of the butterfly valve should follow the three principles of "symmetry, uniformity and step by step"; 　　

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