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Structural Characteristics of Butterfly Valve

  • 2021-05-03 21:03

The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect, and adjust the medium in the pipeline. The fluid control characteristics and closing and sealing performance.

    The butterfly valve can transport mud, and the accumulation of liquid at the pipe mouth is minimal. Under low pressure, good sealing can be achieved. Good adjustment performance.

    The streamlined design of the butterfly plate makes the fluid resistance loss small, which can be described as an energy-saving product.
 

    The valve stem is a through-rod structure, after quenching and tempering, it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the butterfly valve is opened and closed, the valve stem only rotates and does not move up and down, the packing of the valve stem is not easy to be damaged, and the sealing is reliable. It is fixed with the butterfly plate cone pin, and the extended end is designed to prevent the valve from breaking out, so as to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate is accidentally broken.

    The connection methods include flange connection, butt connection, butt welding connection and lug butt connection.

    The driving forms include manual, worm gear transmission, electric, pneumatic, hydraulic, electro-hydraulic linkage and other actuators, which can realize remote control and automatic operation.

 

    The disadvantages of butterfly valves are as follows:

    1. The working pressure and working temperature range are small.

    2. Poor airtightness. 

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