The Use Of Soft Seal Butterfly Valves

Scope of Application of Soft Seal Butterfly Valves
Soft sealed butterfly valves are suitable for flow regulation. Due to the significant pressure loss of a soft seal butterfly valve in the pipeline, which is approximately three times that of a gate valve, when selecting a soft seal butterfly valve, full consideration should be given to the impact of pressure loss on the pipeline system, as well as the robustness of the butterfly plate to withstand the pressure of the pipeline medium when closed. In addition, it is also necessary to consider the limitations of the working temperature that the material of the elastic valve seat can withstand at high temperatures. The structural length and overall height of soft seal butterfly valves are small, with fast opening and closing speeds, and good fluid control characteristics. The structural principle of soft seal butterfly valves is most suitable for making large-diameter valves. When soft sealing butterfly valves are required to control flow, the most important thing is to correctly select the size and type of soft sealing butterfly valves, so that they can work properly and effectively.
Usually, in throttling, regulating control, and mud media, short structural length and fast opening and closing speed (1/4 turn) are required. Low pressure cutoff (low pressure difference), it is recommended to use a soft sealing butterfly valve.
Soft sealed butterfly valves can be used for dual position adjustment, necked channels, low noise, cavitation and gasification phenomena, small leakage into the atmosphere, and corrosive media. When using soft sealing butterfly valves under special operating conditions such as throttling adjustment, strict sealing requirements, severe wear, low temperature (deep cold), etc., special designed metal sealing belt adjustment devices with three or two eccentricities are required for soft sealing butterfly valves. The midline soft sealing butterfly valve is suitable for fresh water, sewage, seawater, brine, steam, natural gas, food, medicine, oil, and various acid and alkali pipelines that require complete sealing, zero gas leakage during gas testing, high service life requirements, and operating temperatures between -10 ° C and 150 ° C. The soft sealing eccentric soft sealing butterfly valve is suitable for bidirectional opening and closing and adjustment of ventilation and dust removal pipelines, and is widely used in gas pipelines and waterways in metallurgical, light industry, power, petrochemical systems, etc. The metal to metal wire sealed double eccentric soft sealing butterfly valve is suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines, as a regulating and throttling device. Metal to metal face sealed triple eccentric soft sealing butterfly valves are not only used as program control valves for large pressure swing adsorption (PSA) gas separation devices, but also widely used in fields such as petroleum, petrochemical, chemical, metallurgy, power, etc. They are good substitutes for gate and globe valves.