I want to meet someone who bought a butterfly valve

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, Su Yan, 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.

I'm sorry, but I'm the one who sells butterfly valves.

Butterfly valve can be used for on/off control of low-pressure pipeline mediumButterfly valve refers to a kind of valve that is a disc that rotates around the valve shaft to achieve opening and closing.

Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals 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 butterfly valve not only has simple structure, small size, light weight, low material consumption, small installation size, small driving torque, simple and fast operation, but also has good flow regulation function and closing sealing characteristics at the same time, and is one of the fastest growing valve varieties in the past ten years.

Because the flow resistance of the butterfly valve in the pipeline is very large, attention should also be paid to the firmness of the butterfly plate to bear the material pressure of the pipe and the type when closing. In addition to this, it is important to consider the material of the elastic high-pressure gate valve at high temperatures to bear the operating temperature limit. The structure size and overall height of the butterfly valve are relatively small, the opening and closing speed is faster, and it has better fluid control characteristics, and the structural principle of the butterfly valve is more suitable for making large-diameter valves.

When the butterfly valve is specified for the use of flow control, the main thing is to choose the correct size and type of butterfly valve, so that it can be reasonably lifted and put into work.

We can often see various types of valves in our daily life, and different valves are very different, so what is a butterfly valve?

1. What is a butterfly valve?

It is a kind of simple structure of the control valve, usually used in the control of low-pressure pipeline medium switch, generally in the shape of a disc, around the valve shaft rotation can achieve the effect of the switch. Valves are usually used to control the switch of air, water, steam, oil and other media, and the appearance and use of different valves are also very different.

Second, how to maintain the butterfly valve?

1. There must be regular operation during daily operation to ensure that each valve in the butterfly valve can be smooth and easier to use, and this can avoid the valve rusting and stuck.

2. If there is a problem that the butterfly valve cannot be closed tightly, the butterfly valve should be opened, and then the stains in the butterfly valve should be cleaned up through the pressure inside, and then it can be closed. However, be aware that if there are too many stains inside the butterfly valve, then safety cannot be guaranteed.

3. Usually to avoid the butterfly valve being damaged, such as the chemicals or water vapor in the air will cause corrosion to them, so that its quality is reduced, in addition, the various parts of the butterfly valve must be cleaned up, so that it can maintain lubrication, so as to ensure normal operation.

3. What to do if the butterfly valve can't be opened?

Check whether the disc plate and the base of the butterfly valve are stuck by the item, if there is a way to clean it up, but if the butterfly valve has symptoms of corrosion, it is necessary to remove rust and clean it up, if it still has no effect, you need to contact professional workers to overhaul.

I conclude: the above is some information about the butterfly valve, from the above article we can see that the valve should also be maintained regularly when it is usually used, so as to ensure that it can operate normally, reduce the cost of follow-up maintenance, save more money and time, avoid a lot of unnecessary trouble, I hope to help you.

Valves are generally divided into automatic valves and drive valves, and automatic valves (such as safety valves, pressure reducing valves, steam traps, check valves) rely on the change of the pressure of the device or pipeline medium to achieve the purpose of opening and closing. Drive valves (gate valves, globe valves, ball valves, butterfly valves, etc.) are driven devices (manual, electric, hydraulic, pneumatic, etc.) to regulate the pressure, flow and direction of the medium in the pipeline.

Due to the different pressure, temperature, flow rate and physical and chemical properties of the medium, the control requirements and use requirements for the device and pipeline system are also different, so the functions of the valve are also different.

Butterfly valves. This classification method is divided according to the principle, function and structure, and is currently the most commonly used classification method in China. Generally, it is divided into: gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, throttle valves, safety valves, pressure reducing valves, trap valves, and regulating valves.

Classified by valve function:

Cut-off valve: The shut-off valve, also known as the shut-off valve, is used to turn on or off the medium in the pipeline. Cut-off valves include gate valves, globe valves, plug valves, ball valves, butterfly valves and diaphragm valves.

Control valves: Control valves include control valves, throttle valves and pressure reducing valves, which are used to regulate the pressure, flow and other parameters of the medium.

Check valve: Check valve, also known as check valve or check valve, is used to prevent the backflow of media in the pipeline. The foot valve of the suction off of the water pump also belongs to the category of check valves.

Safety valve: The function of the safety valve is to prevent the medium pressure in the pipeline or device from exceeding the specified value, so as to achieve the purpose of safety protection.

Diverter valves: Diverter valves include various distribution valves and traps, etc., which are used to distribute, separate or mix the medium in the pipeline.

Exhaust valve: The exhaust valve is an indispensable auxiliary component in the pipeline system, which is often installed at the commanding height or elbow to remove excess gas in the pipeline, improve the efficiency of pipeline use and reduce energy consumption.

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Problem description: I need a full text introduction about butterfly valves, who is kind enough to provide it.

Analysis: 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 opening and closing or adjusting the valve is called butterfly valve. The butterfly valve is usually less than 900 when fully open to fully closed, the butterfly valve and the butterfly rod itself are not self-locking strong, in order to position the butterfly plate, a worm gear reducer should be installed on the valve stem.

The use of worm gear reducer can not only make the butterfly plate have the ability to lock itself, make the butterfly plate stop in any position, but also improve the operation performance of the valve.

The characteristics of the industrial butterfly valve can withstand high temperatures, the applicable pressure range is also high, the valve nominal diameter is large, the valve body is made of carbon steel, and the sealing ring of the valve plate is made of metal ring instead of rubber ring. The large high-temperature butterfly valve is made of steel plate welding, which is mainly used for flue air ducts and gas pipelines of high-temperature medium.

The advantages of butterfly valves are as follows:

1. It is convenient and fast to open and close, labor-saving, and has low fluid resistance, and can be operated frequently.

2. Simple structure, small size and light weight.

3. It can transport mud and accumulate the least liquid at the mouth of the pipeline.

4. Under low pressure, good sealing can be achieved.

5. Good adjustment performance.

The disadvantages of butterfly valves are as follows:

1. The range of operating pressure and working temperature is small.

2. Poor sealing.

According to the structural form, butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type. According to the sealing form, it can be divided into two types: relatively sealed type and hard sealed type. The soft seal type is generally sealed with a rubber ring, and the hard seal type is usually sealed with a metal ring.

According to the connection type, it can be divided into flange connection and clamp connection; According to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic and electric.

Attention should be paid to the following matters in the installation and maintenance of butterfly valves:

1. During installation, the valve disc should stop in the closed position.

2. The opening position should be determined according to the rotation angle of the butterfly plate.

3. For butterfly valves with bypass valves, the bypass valve should be opened before opening.

4. It should be installed according to the installation instructions of the manufacturer, and a solid foundation should be set for the butterfly valve with large weight.

Butterfly valves are also called flap valves.

It is a simple structure of the control valve, which can be used for the on-off control of low-pressure pipeline medium, and the butterfly valve refers to a valve that is a kind of valve that is rotated around the valve shaft to achieve opening and closing.

Because his valve body is more like a butterfly, it is named butterfly valve.

Quote Encyclopedia: Double Eccentric Butterfly Valve On the basis of the single eccentric butterfly valve, the most widely used double eccentric butterfly valve is further improved. Its structure is characterized by a deviation from both the center of the butterfly plate and the center of the body at the stem axis.

The effect of double eccentricity makes the butterfly plate quickly detach from the valve seat after the valve is opened, which greatly eliminates the unnecessary excessive extrusion and scratching phenomenon between the butterfly plate and the valve seat, reduces the opening resistance, reduces wear and tear, and improves the life of the valve seat. The significant reduction of scratching also makes the double eccentric butterfly valve also use metal seats, which improves the application of butterfly valves in high-temperature fields. However, because the sealing principle is a positional sealing structure, that is, the sealing surface of the butterfly plate and the valve seat is in linear contact, and the elastic deformation caused by the butterfly plate extrusion of the valve seat produces a sealing effect, so the closing position is very high (especially the metal seat), and the pressure bearing capacity is low, which is why people traditionally believe that the butterfly valve is not resistant to high pressure and has a large leakage.

Triple eccentric butterfly valve must be resistant to high temperatures, must use hard seals, but the leakage is large; To achieve zero leakage, it is necessary to use a soft seal that is not resistant to high temperatures. In order to overcome the contradiction of double eccentric butterfly valve, the butterfly valve was eccentric for the third time. Its structural characteristics are that at the same time as the axial position of the valve stem of the double eccentricity is eccentric, the conical axis of the sealing surface of the butterfly plate is deviated from the cylindrical axis of the body, that is to say, after the third eccentricity, the sealing section of the butterfly plate is no longer a true circle, but an ellipse, and the shape of the sealing surface is also asymmetrical, one side is inclined to the center line of the body, and the other side is parallel to the center line of the body.

The biggest feature of this third eccentricity is that it fundamentally changes the sealing structure, no longer a position seal, but a torsion seal, that is, it does not rely on the elastic deformation of the valve seat, but completely relies on the contact surface pressure of the valve seat to achieve the sealing effect, so it solves the problem of zero leakage of the metal valve seat in one fell swoop, and because the contact surface pressure is proportional to the medium pressure, the high pressure and high temperature resistance is also easily solved.