Butterfly valve is suitable for flow regulation. As the butterfly valve in the pipeline pressure loss ratio is relatively large, should also consider the closure of the butterfly plate under the pressure of the pipeline medium of sturdiness. In addition, consideration must also be given to the limitation of the working temperature of resilient seat materials at elevated temperatures. Butterfly valve structure length and overall height is small, open and close speed, and has good fluid control characteristics, butterfly valve structure principle is most suitable for the production of large diameter valves. When the butterfly valve is required to be used for control flow, the most important thing is to select the size and type of butterfly valve correctly so that it can work properly and effectively.
Usually, in throttling, regulating control and slurry medium, the structure length is short and the speed of opening and closing is fast (1/4 rpm). Low voltage cut-off (small pressure difference), recommended selection of butterfly valve.
In the double position adjustment, necking channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive media, you can choose butterfly valve.
In special conditions under the condition of throttling regulation, or require strict sealing, or wear serious, low temperature (deep cold) and other operating conditions under the use of butterfly valve, the use of special design Metal seal belt adjustment device three eccentric or double eccentric dedicated butterfly valve.
The centerline butterfly valve is suitable for the complete sealing, the gas test leakage is zero, the life requirement is higher, the working temperature is in the 10 degree $number degree fresh water, the sewage, the seawater, the brine, the steam, the natural gas, the food, the medicine, the oil and the various acid-base and other pipeline.
The soft seal eccentric butterfly valve is suitable for the bidirectional opening and adjusting of the ventilation and dedusting pipe, and is widely used in the gas pipelines and waterways of metallurgy, light industry, electric power and petrochemical system.
Metal wire seal double eccentric butterfly valve for the city heating, gas, water and other gas, oil, acid and alkali pipelines, as a regulator and throttle device.
Metal to metal surface sealing three eccentric butterfly valve in addition to the large PSA (PSA) Gas separation Device program control valve use, but also widely used in petroleum, petrochemical, chemical, metallurgy, power and other fields, when the gate valve, cut-off valves good replacement products.