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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.

Different Butterfly Valve Vs Ball Valve

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We all know that there are many kinds of ball valves, including this butterfly valve is one of them. Then the well-known difference between ball valve and butterfly valve is its opening and closing parts, the opening and closing parts of butterfly valve are plates, and the ball valve is a ball. They all rotate around one of their axes. Let’s go on and see what’s the difference between butterfly and ball valves.

Distinction One

Ball valves and butterfly valves have different cut-off modes: ball valves block the passage through the ball to achieve pipeline cut-off flow; butterfly valves rely on butterfly wings, laying the sealed pipeline will not flow.

Difference 2

The structure of ball valve and butterfly valve is different: ball valve is made of valve body, spool and stem assembly, only part of the parts can be seen in the body; butterfly valve is made up of valve body, seat, valve plate and stem, all parts are exposed outside. So it can be seen that the sealing of butterfly valve is not as good as that of ball valve. Speaking of sealing, butterfly valves are also divided into soft and hard seals. Butterfly valve structure is relatively simple, can only be used in low pressure environment, the maximum pressure is only 64 kg. Compared with ball valves, ball valves can be up to about 100 kilograms.

Distinction 3

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

Comparison of Butterfly Valve and Ball Valve

Advantages of butterfly valve 1: simple structure, small size, light weight; Disadvantage is that the use of pressure and working temperature is much smaller than the spherical valve range.

Advantages of butterfly valves 2: Good sealing can be achieved under low pressure; Disadvantage is that the sealing performance is much worse than that of ball valves.

Advantages of butterfly valve 3: It can transport mud, and has the least liquid in the pipe mouth, which is better than ball valve.

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

Butterfly valve dimensions and models

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The butterfly valve is a simple regulating valve, which is mainly composed of a valve body, a valve stem, a butterfly plate and a sealing ring. The valve body has a cylindrical shape with a short axial length and a built-in disc. The butterfly valve has the advantages of flexible operation and labor saving, and can be selected by manual, electric, pneumatic, hydraulic, and convenient installation, and is well received by everyone. I believe that many people don’t know much about the specifications and models of butterfly valves. Let’s take a look at the specifications and models of butterfly valves.

Butterfly valve advantages

  1. It is convenient, quick, labor-saving, and has low fluid resistance. It can be operated frequently.
  2. Simple structure, small size and light weight.

3, can transport mud

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

5, the adjustment performance is good.

Butterfly valve specifications and models

Model: D71X/F

Caliber: 40~800

Pressure: 1.6MPa

Material: cast iron, cast steel, stainless steel

Flanged butterfly valve

Model: D41X/D43H

Caliber: 50 ~ 1200

Pressure: 1.6MPa-4.0MPa

Material: cast iron, cast steel, stainless steel

Pneumatic hard seal butterfly valve

Model: D673H/D643H

Caliber: 50~2000

Pressure: 1.6MPa-4.0MPa

Material: cast iron, cast steel, stainless steel

Material: ductile iron, cast steel, alloy steel, stainless steel

The butterfly valve model indicates that the sequence code is generally: butterfly valve type code, butterfly valve transmission mode, butterfly valve connection form, butterfly valve structure form, butterfly valve sealing surface material or lining material, butterfly valve nominal pressure, butterfly valve body material, which is the most basic arrangement mode D341X. -16C.
The above is a brief introduction to the specification and model of the butterfly valve. It can be known from the above that the butterfly valve has a wide application range. The butterfly valve is widely used not only in general industries such as petroleum, gas, chemical, water treatment, but also for cooling of thermal power stations. water system. When installing the butterfly valve, you should pay attention to the valve flap to stop at the closed position. The opening position should be determined according to the rotation angle of the butterfly plate. The butterfly valve with the bypass valve should open the bypass valve before opening. I hope that the introduction of these butterfly valve specifications and models can help everyone.

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