The highlight of the soft-sealed butterfly valve, the soft-sealed butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. When the soft sealing butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The soft sealing butterfly valve has two sealing types: elastic sealing and metal sealing. Elastic sealing valve, the sealing ring can be inlaid on the valve body or attached to the periphery of the butterfly plate. Valves with metal seals generally have a longer life than valves with elastic seals, but it is difficult to achieve a complete seal. The metal seal can adapt to higher working temperature, while the elastic seal has the defect of being limited by temperature.
In the case of two-position adjustment, narrow passage, low noise, cavitation and vaporization, a small amount of leakage into the atmosphere, and abrasive media, soft-sealed butterfly valves can be selected. When throttling adjustment is required under special working conditions, or strict sealing is required, or the soft-seal butterfly valve is used under severe abrasion, low temperature (cryogenic) and other working conditions, it is necessary to use a specially designed metal seal with a three-eccentric or double-eccentric adjusting device Special soft sealing butterfly valve for ground.
