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Differences Between a Ball Valve & a Butterfly Valve

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Everyone knows that there are many types of ball valves, including this butterfly valve. Then the well-known difference between a ball valve and a butterfly valve is its opening and closing member. The opening and closing member of the butterfly valve is a block plate, and the ball valve is a ball. They all rotate around one axis of their own. Let’s continue to see what is the difference between a butterfly valve and a ball valve.

Comparison between butterfly valve and ball valve
Advantages of butterfly valve 1: simple structure, small volume and light weight; disadvantages are that the range of using pressure and working temperature is much smaller than that of ball valve
Advantages of butterfly valve 2: good sealing can be realized under low pressure; the disadvantage is that the sealing performance is much worse than that of ball valve
Advantages of butterfly valve 3: it can transport mud with the least liquid accumulated in the pipe mouth, which is better than the ball valve
Advantages of butterfly valve 4: the structural principle of butterfly valve is more suitable for making large-diameter valve, widely used in oil, gas, chemical industry and other industries

Difference one
The cut-off method of ball valve and butterfly valve is different: the ball valve blocks the passage through the ball to realize the pipe cut-off flow; the butterfly valve relies on the butterfly wing, so the pipe will not flow if it is spread and sealed.

Difference two
The structure of the ball valve is different from that of the butterfly valve: the ball valve is composed of the valve body, valve core and valve rod assembly, and the body can only see some parts; the butterfly valve is composed of the valve body, valve seat, valve plate and valve rod, and all the accessories are exposed outside. Therefore, the tightness of butterfly valve is not as good as that of ball valve. When it comes to sealing, butterfly valves are also divided into soft sealing and hard sealing. Butterfly valve structure is relatively simple, can only be used in low-pressure environment, the highest pressure is only 64 kg. Compared with the ball valve, the maximum ball valve can reach about 100 kg.
Difference three

 

The working principle of the ball valve and butterfly valve is different: the ball valve has a 90 degree rotation action, only because its opening and closing parts are a ball, only need to operate 90 degree rotation to achieve opening or closing, which is most suitable for switching. But now v-ball valve can be used to regulate or control the flow. Butterfly valve is a kind of valve that uses disc type opening and closing parts to turn back and forth about 90 ° to open, close or regulate medium flow. It has a good function of regulating flow and is one of the fastest-growing valve varieties.

 

 

 

 

 

 

 

FAQ

What is a butterfly valve used for?
Butterfly valves are used where space is limited. Unlike gate valves, butterfly valves can be used for throttling or regulating flow as well as in the full open and fully closed position. The pressure loss through a butterfly valve is small in comparison with the gate valve
What is difference between ball valve and globe valve?
The main difference between these two types is the way they close. A globe valve uses a plug (stem) that closes against the flow, and a ball valve has a gate (ball) that closes across the flow. Globe valves are good for regulating flow, whereas ball valves are better for on/off control without pressure drop.
Why are ball valves so expensive?
This is due to the fast opening/closing of the ball valve that may cause a water hammer. Cost: A ball valve is generally more expensive than a gate valve of the same specifications. However, a ball valve is typically more durable and requires less maintenance compared to a gate valve.