Disc valves and ball valves are how to distinguish from each other in appearance

The biggest difference in appearance between butterfly valves and ball valves:

1. The opening and closing parts of the butterfly valve are a plate, and the ball valve is a ball. The valve plate of the butterfly valve and the valve core of the ball valve are rotating around their own axis, and the sealing surface of the ball valve is spherical. To put it simply, one is to block with a ball, and the other is to block with a blade.

2. The butterfly valve is mainly composed of the valve body, valve stem, butterfly plate and sealing ring.

Compose. The valve body is cylindrical and axial.

Short length, built-in butterfly plate. Ball valve, the opening and closing parts (ball) are driven by the valve stem and rotate around the axis of the ball valve.

If you want to talk about the difference, the biggest difference is that the opening and closing parts of the butterfly valve are a plate, while the ball valve is a ball. They all work in rotational motion around their own axis!

<>1) The butterfly valve is composed of a valve body, a valve seat, a valve plate, and a valve stem, and all accessories are leaked on the outside and can be seen at a glance; The ball valve is composed of the valve body, the valve core (which is a round ball) and the valve stem, and the position of the valve core is in the valve body, and only part of it can be seen by the naked eye, so the sealing performance of the ball valve is better than that of the butterfly valve;

2) The structure of the butterfly valve is relatively simple, and the butterfly valve is generally used for low pressure, and the maximum pressure of the butterfly valve can only reach 64 kg. The structure of the ball valve is relatively complex, more resistant to high pressure, and the ball valve can reach up to 100 kg.

3) Butterfly valve is divided into soft seal and hard seal, soft seal butterfly valve is generally the center of the vertical plate, that is, the valve plate, valve seat, valve stem are in the center position, the maximum temperature of the soft seal butterfly valve is below 150 degrees, the pressure is below 16 kg, the hard seal butterfly valve can be divided into single eccentric, double eccentric, triple eccentric, we generally use more three eccentric, because the three eccentric according to its structure, the sealing performance is better, the pressure of the hard seal butterfly valve is less than 64 kg;

4) Ball valves can also be divided into soft seals and hard seals, the maximum temperature of soft seal ball valves can reach below 280 degrees and the pressure is below 64 kg, and the maximum temperature of hard seal ball valves can reach below 425 degrees and the pressure is below 100 kg.

There are many types of butterfly valves, including manual butterfly valves, electric butterfly valves, and pneumatic butterfly valves. Wait. In appearance, the valve body is generally biased, like a round cutting board. The ball valve body is basically long cylindrical in appearance, and most of the spools are spherical.

The ball valve sees that the valve is round, while the disc valve is generally a pair, and some can't see it.

The butterfly valve is oblate, and the ball valve is cylindrical, in fact, the names are very vivid.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Chaoda, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Ball valves and butterfly valves are both more commonly used valves. Some occasions can be universal, while others can only be used in one of them. The difference between the two is mainly due to the difference in structure and switching principle.

Compared with ball valves, butterfly valves have slightly worse sealing, but among large-diameter valves, they have advantages over ball valves; When used as a residual pair to regulate the flow rate, the butterfly valve has a small adjustment range, while the V-shaped regulating ball valve has accurate adjustment. In addition, in high-pressure pipelines, ball valves have an advantage over Vona butterfly valves.

Ball and butterfly valves.

The structure is completely different.

Conventional ball valves are O-type ball valves.

The main thing is that the ball core is round.

The V-shaped ball valve ball core is angled

Butterfly valves are available in soft and hard seals. There is a difference between the two different types of butterfly valves in terms of internal structure. Let me first tell you about the internal structure of the soft seal butterfly valve. Let's take a look at the picture first:

Internal structure of butterfly valve.

The soft seal butterfly valve is a very simple valve with a valve body, stem, plate, seat, and transmission. The inside of the valve body is a cylindrical channel with a butterfly plate inside. The sealing pair of a soft-seal butterfly valve is usually composed of a hard metal material and a non-metallic soft material.

The advantage of this butterfly valve is that its valve seat is made of non-metallic soft materials with certain strength, hardness and temperature resistance, so that when the butterfly valve is closed, the metal butterfly plate forms a good sealing performance by squeezing the non-metallic soft valve seat.

There are many kinds of butterfly valves, which are basically divided into two categories: midline and eccentric, if you understand the drawings, you can understand them all by looking at the drawings. Or take a look at the real thing.

The valve plate of the butterfly valve and the valve core of the ball valve are rotating around their own axis; The valve plate of the gate valve is lifted and lowered along the axis; Butterfly valves and gate valves can adjust the flow rate by the degree of opening; Ball valves do not facilitate this.

1. The sealing surface of the ball valve is spherical.

2. The sealing surface of the butterfly valve is an annular cylindrical surface.

3. The sealing surface of the gate valve is flat.

Gate valve: There is a plate in the valve body that is perpendicular to the flow direction of the medium, and the plate is lifted and lowered to achieve opening and closing.

Features: good sealing, low fluid resistance, small opening and closing force, wide range of uses, but also have a certain flow adjustment performance, generally suitable for large-diameter official roads.

Ball valve: A ball with an opening in the middle is used as the valve core, and the opening and closing of the ball is controlled by rotating the ball.

Features: The structure is simpler than that of the gate valve, the volume is small, the fluid resistance is small, and it can replace the role of the gate valve.

Disc valve: The opening and closing part is a disc-shaped valve that rotates around a fixed shaft in the valve body.

Features: Simple structure, small size, light weight, suitable for making larger diameter valves. Because there are still problems with the sealing structure and materials, it is only used for low pressure and for transporting water, air, gas and other media!

First, the reference is different.

1. Ball valve: the opening and closing parts (balls) are driven by the valve stem and rotate around the axis of the ball valve.

2. Butterfly valve: also known as flap valve, is a simple structure of the regulating valve, which can be used for the on-off control of low-pressure pipeline medium, and the butterfly valve refers to a kind of valve that is a kind of valve that is rotated around the valve shaft to achieve opening and closing.

Second, the characteristics are different.

1. Ball valve: the fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length. Simple structure, small size and light weight.

It is tight and reliable, and the sealing surface material of the ball valve is widely made of plastic, and the sealing performance is good, and it has also been widely used in vacuum systems. It is easy to operate, quick to open and close, and only needs to rotate 90° from full open to full closed, which is convenient for long-distance control.

2. Butterfly valve: The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switch, 90° reciprocating rotation, small driving torque, etc., and is used to cut, turn on and adjust the medium in the pipeline, and has good fluid control characteristics and closing sealing performance.

Third, the use is different.

1. Ball valve: It can be used for the regulation and control of fluids, among which the hard seal V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal seat of the hardfacing cemented carbide, especially suitable for media containing fibers and tiny solid particles. The multi-way ball valve can not only flexibly control the merging, diversion, and flow direction switching of the medium on the pipeline, but also close any channel and connect the other two channels.

2. Butterfly valve: The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline.

The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting.

The biggest difference between the ball valve and the butterfly valve is that the opening and closing parts of the butterfly valve are a plate, while the ball valve is a ball, and the valve plate of the butterfly valve and the valve core of the ball valve are rotating around their own axis; The valve plate of the gate valve is lifted and lowered along the axis; Butterfly valves and gate valves can adjust the flow rate by the degree of opening; Ball valves do not facilitate this.

The butterfly valve is characterized by fast opening and closing speed, simple structure and low cost, but the tightness and pressure-bearing capacity are not good. The characteristics of ball valves are similar to those of gate valves, but due to the limitations of volume and opening and closing resistance, it is difficult to achieve a large diameter.

The structural principle of the butterfly valve is especially suitable for making large-diameter valves, and the butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis at an angle of 0° 90°, and when it is rotated to 90°, the valve is fully open. Its structure is simple, the cost is low, and the adjustable range is large.

Ball valves are usually suitable for liquids and gases without particles and impurities, with low fluid pressure loss, good sealing performance and high cost. Comparatively speaking, the seal of a ball valve is a bit better than that of a butterfly valve. The ball valve seal is squeezed on the spherical surface for a long time by the valve seat, which must wear out faster than the hemispherical valve, and the seal of the ball valve is usually made of flexible materials, which is also difficult to use in high-temperature and high-pressure pipelines.

The sealing of butterfly valve is based on rubber, which is far from the metal hard sealing performance of hemispherical valves, ball valves and gate valves. After the hemispherical valve is used for a long time, the valve seat will also produce a trace of wear, it can be adjusted to continue to use, the valve stem and packing only need to rotate 90° during the opening and closing process, when there are signs of leakage, and then press the bolt of the packing gland a little, you can achieve no leakage at the packing, while other valves are still small leaks are barely used, large leaks to replace the valve.

The ball valve is operated under the tightening force of the valve seat at both ends in the process of opening and closing, it is larger than the opening and closing torque of the hemispherical valve, the larger the nominal diameter, the more obvious the difference between the opening and closing moments, and the opening and closing of the butterfly valve is to overcome the deformation of the rubber to achieve, and the torque is greater. The operation time of gate valves and globe valves is long and laborious.

Ball valve and plug valve are the same type of valves, only its closing part is a ball, and the ball rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of the medium.

The butterfly valve is composed of a valve body, a valve seat, a valve plate, and a valve stem, and all accessories are leaked outside, which can be seen at a glance; The ball valve is composed of the valve body, the valve core (is a round ball), and the valve stem, and the position of the valve core is in the valve body, and only part of it can be seen by the naked eye, so the sealing performance of the ball valve is better than that of the butterfly valve; The structure of the butterfly valve is relatively simple, and the butterfly valve is generally used for low pressure, and the maximum pressure of the butterfly valve can only reach 64 kg. The structure of the ball valve is relatively complex, more resistant to high pressure, and the ball valve can reach up to 100 kg.

Butterfly valves are divided into soft seal and hard seal, soft seal butterfly valve is generally the center of the vertical plate, that is, the valve plate, valve seat, valve stem are in the center position, the maximum temperature of the soft seal butterfly valve is below 150 degrees, the pressure is below 16 kg, hard seal butterfly valve can be divided into single eccentric, double eccentric, triple eccentric, we generally use more three eccentric, because the three eccentric according to its structure, the sealing performance is better, the pressure of the hard seal butterfly valve is less than 64 kg; Ball valves can also be divided into soft seals and hard seals, the maximum temperature of soft seal ball valves can reach below 280 degrees and the pressure is below 64 kg, and the maximum temperature of hard seal ball valves can reach below 425 degrees and the pressure is below 100 kg. Shanghai Zhongmei valve answers for you for reference.

Butterfly valve has simple structure, low cost, large adjustable range, ball valve is usually suitable for liquids and gases without particles and impurities, with small fluid pressure loss, good sealing performance and high cost.

Small-diameter ball selection valve, large-diameter butterfly valve.

The difference between the two valves is roughly known from the name. The cut-off of the ball valve is achieved by a ball in the valve, and the ball will not flow when it blocks the pipe, but will flow when it is removed. The cut-off effect of the butterfly valve relies on two or one butterfly wings, just like butterfly wings, or like a blade.

To put it bluntly, one is to block with a ball, and the other is to block with a blade.

The opening and closing parts (balls) are driven by the valve stem and rotate around the axis of the valve stem is a ball valve. A ball valve is a type of valve.

Valve is a general term for mechanical products with movable mechanisms that are used to control the medium in the pipeline. There are many kinds of valves, commonly used are globe valves, gate valves, ball valves, butterfly valves, check valves, plug valves, pressure reducing valves, safety valves, trap valves, throttle valves, float valves, etc.