- pneumatic butterfly valve Adjustment of the pneumatic valve related knowledge and action

butterfly pneumatic valve ( English: butterflyvalve refers to the closing member ( Pneumatic disc or disc to disc, revolve around pneumatic valve shaft to a pneumatic valve open and close, mainly in the line cut off and throttling. Butterfly pneumatic valve opening and closing is a disc-shaped butterfly plate, the pneumatic valve body around its own axis of rotation, so as to achieve the aim of opening and closing or adjust. Butterfly pneumatic valve fully open to the barrier is usually less than °, pneumatic valve and butterfly butterfly pole itself has no self-locking ability, in order to butterfly plate positioning, in the pneumatic valve stem with worm gear reducer. The use of worm gear reducer, can not only make the butterfly plate with self-locking ability, make the butterfly plate to stop at any position, can also improve the aerodynamic performance of the valve. , industrial special high temperature the characteristics of the pneumatic valve adjustment ability, apply pressure range is higher also, large nominal diameter pneumatic valve, pneumatic valve body is made of carbon steel, pneumatic valve plate seal using metal ring instead of rubber ring. Large high temperature butterfly pneumatic valve USES the steel plate welding manufacturing, mainly used for the duct smoke and gas of high temperature medium. Butterfly pneumatic valve is made open-close circular disc and with the pneumatic valve rod rotation to open and close and regulating fluid channel of a pneumatic valve. Butterfly butterfly plate installed on the diameter of the pipe of pneumatic valve. In cylindrical channels of pneumatic valve pneumatic butterfly valve body and disc disc around the axis of rotation, rotation Angle for ° ~ °, rotate to °, the pneumatic valve is fully open. Butterfly pneumatic valve, pneumatic valve also called flap is a simple structure of pneumatic valve regulation, at the same time can also be used for low pressure pipeline medium switch control. As chemical corrosion prevention of synthetic rubber in the application of the pneumatic valve butterfly butterfly which greatly improved the performance of the pneumatic valve. Because the synthetic rubber has corrosion resistance, erosion resistance, dimension stability, and good resilience, easy forming, characteristics such as low cost, can choose according to different application requirements and different performance of synthetic rubber, in order to meet the butterfly working conditions of the use of pneumatic valve. Because ptfe ( PTFE with strong corrosion resistance, stable performance, not easy to aging, low friction coefficient, easy to shape, size stability, and can be filled, add the appropriate materials to improve the comprehensive performance, get better strength, lower friction coefficient the pneumatic butterfly valve sealing material, overcome the limitations of the synthetic rubber, thus represented by PTFE polymer materials and their filling modification of materials, has been widely used in pneumatic valve adjustment, so that the adjustment of the pneumatic valve performance is further improved, making the temperature and pressure is wider, reliable sealing performance, longer service life of pneumatic valve adjustment. In order to meet the high and low temperature, strong erosion, long-life industrial applications such as the use of the requirements, the metal sealing butterfly pneumatic valve got great development. With high temperature resistant, good low temperature resistance, strong corrosion resistance, strong erosion resistance, high strength alloy materials in the application of the pneumatic valve adjustment, make the metal sealing butterfly pneumatic valve in high and low temperature, strong erosion, long life and other industrial fields has been widely used, the large diameter ( ~ mm, high pressure, 。 MPa, wide temperature range ( - ℃ ~ the pneumatic butterfly valve, making the adjustment of the pneumatic valve technology reached a whole new level. Adjusting the structure of the pneumatic valve length and smaller overall height, opening and closing speed faster, and has good flow control characteristics. Adjusting the structure principle of pneumatic valve is best suited for production of large diameter pneumatic valves. When require butterfly pneumatic valve to control flow, when using one of the most important is the right choice of the specifications of the pneumatic valve and types, and making it work properly and effectively. Usually, in throttling and adjusting control and mud medium, demand structure length is short, the opening and closing speed and low pressure globe ( Pneumatic valve pressure difference is small, recommended to choose a butterfly. In two position adjustment, reducing the channel, low noise, have spirit point and evaporation phenomena, into the atmosphere of a small amount of leakage, with abrasive medium, can choose butterfly pneumatic valve. Throttling under special working conditions, or seal strict, serious wear and tear, low temperature, Under the working conditions of cryogenic etc. Butterfly pneumatic valve is suitable for flow control. Due to the adjustment of pneumatic valve in the pipe pressure loss is bigger, about three times the brake pneumatic valve, therefore, when choosing butterfly pneumatic valve piping system is affected by pressure loss should be considered, also should consider closing butterfly plate the strength of the pipeline medium under pressure. In addition, you must consider elastic pneumatic valve seat material at high temperature on the operating temperature limit.
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