类别：Industry news 发布时间：2019-01-02 14:55:38 浏览：469 次
Because the butterfly valve in the pipeline pressure loss is relatively large. Approximately three times the gate valve, butterfly valves are used for flow regulation. Therefore, when selecting the butterfly valve, the pipeline system should be fully considered the impact of pressure loss, but also consider the closure of the butterfly plate to accept the pipeline medium pressure robustness. In addition, consideration must be given to the operating temperature limits accepted for resilient seat data at high temperatures. Butterfly valve structure length and overall height is small, open and close fast, 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 control flow, the most important thing is to choose the correct size and type of butterfly valve, so that it can work properly and effectively.
Throttling, regulating control and mud medium in general. Short structure length, fast opening and closing speed (1/4 turn) low pressure cut-off (small pressure difference) recommended butterfly valve.
A small amount of leakage into the atmosphere, dual adjustment, shrink mouth ground channel, low noise, cavitation and gasification phenomenon. When there is abrasive medium, butterfly valve can be selected. Or the requirements of airtight, special working conditions throttling regulation. Or wear seriously, low temperature (cryogenic) and other working conditions when using the butterfly valve, it is necessary to use a special design of metal sealing belt adjustment device with three eccentric or double eccentric special butterfly valve.
The middle line butterfly valve is used in the fresh water, sewage, sea water, brine, steam, natural gas, food, medicine, oil products and all kinds of acid and alkali and other pipelines with requirements of complete sealing, zero leakage of gas test, high life requirements and operating temperature of -10 degrees to 150 degrees.
Widely used in metallurgy, light industry, electric power, petrochemical systems gas pipelines and waterways. Soft closed eccentric butterfly valve is used for the ventilation and dust removal pipeline two-way opening and closing and adjustment.
As a regulator and throttling device. Metal to metal wire closed double eccentric butterfly valve is used in urban heating, gas supply, water supply and other gas, oil products, acid and alkali pipelines.
It can also be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, metal to metal surface closed three-eccentric butterfly valve in addition to as a large pressure swing adsorption (PSA gas separation device sequence control valve use. Gate valve, globe valve is a good alternative products.