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Principle and structural characteristics of butterfly

点击次数:1474   发布时间:2015/8/22

Butterfly simple structure having a small size, light weight, material consumption province, small installation size, switch quickly, 90 ° reciprocating rotary drive torque characteristics of small, used to cut, turn, adjust the line of medium, good fluid control features and closed sealing performance. Butterfly valve in the fully open position, the disc thickness is only when the medium flows through the body resistance, produced by the valve pressure drop is small, it has a better flow control characteristics. Butterfly shells sealed and two metal seal types. Elastic sealing valves, seals can be mounted on the body or peripheral boards to Tip.

Stem is through rod structure, after quenching, with good mechanical properties and corrosion resistance, abrasion resistance. When the valve opening and closing the valve stem rotates not only for the lifting operation, the valve stem packing is not easy to destroy, reliable sealing. And disc taper pin fixed, extended end to prevent out design, in order to avoid the connection stem and disc stem the collapse of the accident when at fault.

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