The difference between ball valve and butterfly valve

The well-known difference between the ball valve and the butterfly valve is its opening and closing parts, the opening and closing parts of the butterfly valve are a plate, and the ball valve is a ball. They all rotate around one of their axes. Let's continue to look at the differences between butterfly valves and ball valves.

Distinction I

The cutoff methods of ball valve and butterfly valve are different: the ball valve realizes the cutoff flow of pipeline by blocking the channel through the ball; Butterfly valve depends on the butterfly wing, spread the sealing pipe will not flow.

Distinction two

Ball valve and butterfly valve structure is different: ball valve can only see some parts; All parts of the butterfly valve are exposed. So it can be seen that the sealing of the butterfly valve is not as good as that of the ball valve. The butterfly valve structure is relatively simple, can only be applied to low pressure environment, the highest is only 64 kg of pressure. Compared with ball valves, ball valves can reach up to about 100 kilograms.

Distinction III

The working principle of the ball valve and the butterfly valve is different: the ball valve has a 90-degree rotation action, just because his opening and closing part is a ball, only need to operate 90 degrees of rotation can be opened or closed, the most suitable for the switch. But now the V-shaped ball valve can be used to adjust or control the flow. The butterfly valve is a kind of valve that uses the disc type opening and closing parts to rotate about 90° to open, close or adjust the flow rate of the medium, and has a good function of regulating the flow rate, which is one of the fastest developing valve varieties

Butterfly valve and ball valve comparison

The advantages of butterfly valve 1: simple structure, small size, light weight; The disadvantage is that the use of pressure and working temperature than the ball valve range is much smaller

Advantages of butterfly valve 2: good sealing can be achieved under low pressure; The disadvantage is that the sealing is much worse than the ball valve

The advantage of butterfly valve 3: it can transport mud and accumulate the least liquid in the pipe mouth, which is better than the ball valve

Advantages of butterfly valve 4: The structure principle of butterfly valve is more suitable for large diameter valves, widely used in petroleum, gas, chemical and other industries