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The Advantage and Disadvantage of Butterfly Valve
- Oct 12, 2018 -


1. It is convenient and quick to open and close, labor saving, small fluid resistance, and can be operated frequently.

2, simple structure, small size, short structure length, small size, light weight, suitable for large diameter valves.

3, can transport mud, the least amount of liquid accumulated in the pipe mouth.

4, under low pressure, can achieve a good seal.

5, the adjustment performance is good.

6. The valve seat channel has a large effective flow area and a small fluid resistance when fully opened.

7. The opening and closing torque is small. Since the butterfly plates on both sides of the rotating shaft are basically equal by the medium, the torque is generated in the opposite direction, so the opening and closing is relatively labor-saving.

8. The sealing surface material is generally made of rubber and plastic, so the low-pressure sealing performance is good.

9, easy to install.

10. Flexible and labor-saving operation, manual, electric, pneumatic and hydraulic modes are available.


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

2. Poor sealing.

The butterfly valve can be divided into a bias plate type, a vertical plate type, a slant plate type and a lever type according to the structure.

Available in sealed form, both soft and hard. The soft seal type is generally sealed with a rubber ring, and the hard seal type is usually sealed with a metal ring.

According to the connection type, it can be divided into flange connection and clip type connection; according to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic and electric.