Between 0 ° -90 ° to 90 ° rotation, the valve in the fully open state. Butterfly simple structure, small size, light weight, and only consists of several parts. And just rotate 90 ° to quickly open and close, easy to operate , and the fluid control valve having a good characteristics. The butterfly valve in the fully open position, the butterfly plate thickness is only resistance of the medium flowing through the valve, thus generated through the valve, the pressure drop is small, it has a better flow control characteristics. Two sealing butterfly valve soft seal and metal seal. Soft seal butterfly valve, the sealing member can be mounted on the body or connected to the outer periphery of the disc.
Metal seal valve soft seal valve, long life, but it is difficult to completely seal. Metal seal can adapt to higher operating temperatures, the soft seal, the sealing temperature limit of the defect.stainless steel pneumatic cylinders
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