Do you want to control the 220v pneumatic exhaust brake butterfly valve? The disadvantage of rubber sealed butterfly valve is that when it is used for throttling, cavitation will occur due to improper use, which will cause rubber seat peeling, damage, etc. For this reason, metal sealed butterfly valves have been developed internationally, reducing the cavitation area. In recent years, China has also developed metal sealed butterfly valves, and in Japan, comb shaped butterfly valves with cavitation resistance, low vibration and low noise have also been developed in recent years.
Generally, the service life of the seal seat is 15-20 years for rubber and 80-90 years for metal under normal conditions. However, the correct selection depends on the operating conditions. The relationship between the opening of the butterfly valve and the flow basically shows a linear proportional change. If it is used to control the flow, its flow characteristics are also closely related to the flow resistance of the piping. For example, the diameter and form of the valves installed in the two pipelines are all the same, while the pipeline loss coefficient is different, the flow of the valves will also be very different.
、 However, if the water hammer is eliminated, a water hammer absorber or a slow closing check valve must be installed. Only the butterfly check valve with slow closing function has the function of waterproof hammer. However, the sealing of butterfly valves generally uses flexible materials, which is also very difficult to use in high-temperature and high-pressure pipelines. In contrast, the sealing of the pneumatic butterfly valve is better than that of the butterfly valve. The characteristic of this check valve is to limit the flow direction of the medium, so that the medium will flow in one direction. Generally, swing type and lift type are used. Therefore, before use, we need to understand in detail so that we can better select pneumatic butterfly valves. Of course, this is also a secret function, of course, we also need to understand.
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