Pneumatic pneumatic - valve Adjustment of the pneumatic valve selection principle and applicable field

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. Butterfly pneumatic valve is closed ( Pneumatic disc or disc) For disc, revolve around pneumatic valve shaft to a pneumatic valve open and close, mainly in the line cut off and throttling effect. 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 is suitable for the generator, gas, natural gas, liquefied petroleum gas, city gas, such as hot and cold air smelting, chemical industry and power generation environmental protection engineering system in conveying all kinds of corrosive fluid pipe, non corrosive, used to adjust and block the flow of the medium. Butterfly pneumatic valve applicable occasions: butterfly pneumatic valve is suitable for flow control. Due to the adjustment of pneumatic valve in the pipeline 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, but should also consider closing butterfly plate consistence of pipeline medium under pressure. In addition, you must consider elastic pneumatic valve seat material at high temperature on the operating temperature limit. Adjusting the structure of the pneumatic valve length and smaller overall height, opening and closing speed, 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 to use, the most important thing is that correct selection of the size and type of pneumatic valve adjustment, making them properly, to work effectively. Usually, in throttling, adjust the control with mud medium, shorter demand structure, opening and closing speed ( / r) 。 Low voltage cutoff ( Small pressure difference) Pneumatic valve, recommended to choose a butterfly. In two position adjustment, reducing the channel, low noise, have spirit cave and gasification phenomenon, a small amount of leakage into the atmosphere, with abrasive medium, can choose butterfly pneumatic valve. Throttling under special working conditions, or seal strict, or serious wear and tear, low temperature, Cryogenic) When using the pneumatic valve adjustment such as operating conditions, need to use special design of triple eccentric metal sealing with conditioning or double eccentric butterfly pneumatic valve. Center line butterfly pneumatic valve is suitable for the requirements to seal completely, the gas leakage test is zero, the life the demand is higher, in - operating temperature ~ ℃ of fresh water, sewage, sea water, salt water, steam, gas, food, pharmaceutical, oil and all kinds of acid and alkali and other lines. Soft seal eccentric butterfly pneumatic valves open and close and is suitable for ventilation and dust removal pipe two-way adjustment, widely used in metallurgy, light industry, electric power, petrochemical industry system of gas pipeline and channel, etc. Metal to metal wire sealing double eccentric butterfly pneumatic valve is suitable for the urban heating, steam, water and gas, oil, acid and alkali, such as pipeline as regulation and river closure device. Metal to metal surface seal triple eccentric butterfly pneumatic valve except as large (pressure swing adsorption (psa) PSA） Gas separation device used program control pneumatic valve, also can be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, is the brake pneumatic valve, pneumatic valve up to now, the good alternatives. Adjustment principle of the selection of pneumatic valve, pneumatic valve, due to the adjustment relative to the brake pneumatic valve, pneumatic ball valve pressure loss is bigger, so is relaxed adapted to the pressure loss of pipe system, due to the adjustment of pneumatic valve can be used in flow control, thus in pipe flow control is required for selection, due to the adjustment structure of the pneumatic valve and the limitation of the sealing material, should not be used for high temperature, high pressure pipeline system. General working temperature under ℃, nominal pressure under the PN. , due to the adjustment of pneumatic valve structure is shorter in length, and can make large caliber, requiring short length in structure or large diameter pneumatic valves ( Such as the DN above) Pneumatic valve, appropriate chooses a butterfly. , due to the adjustment of pneumatic valve rotating ° alone can be turned on or off, so in on-off require fast appropriate chooses butterfly pneumatic valve.
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