Butterfly Valve Advantages, Shortcomings?

Butterfly valve advantages:

1) simple structure, small size, light weight, especially for large diameter valves.

2) compared to other types of the same caliber valve, the lowest price; especially stainless steel valves, because the fluid medium is not in contact with the valve body, so only the use of stainless steel valve plate, supplies province, low prices.

3) open and close quickly, small flow resistance.

4) can be used for media with suspended solids, depending on the strength of the sealing surface can also be used for powder and granular media.

5) can be applied to the fluid two-way opening and closing and regulation, regulating performance, and widely used.

6) Low pressure can achieve a good seal.

Butterfly valve Disadvantages:

1) flow adjustment range is not large, when the open up to 30%, the flow will be able to reach more than 95%.

2) due to the structure of the butterfly valve and sealing material restrictions, not for high temperature, high pressure piping system. General operating temperature below 300 °, PN40 below.

3) due to the valve structure of the restrictions, sealing performance relative to the ball valve is poor, so the sealing requirements are not very high places.

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