What is a U lined butterfly valve and what does U shaped mean in U flange butterfly valve

U-shaped lining butterfly valve, also known as U-shaped lining flap valve, is a special structure of regulating valve, which can be used for the on-off control of low-pressure pipeline media butterfly valve refers to the shut-off part (disc or butterfly plate) as a disc, rotating around the valve shaft to achieve opening and closing of a kind of 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.

Extension of knowledge points:

Features of U-lined butterfly valves:

1. Excellent two-way sealing performance and small torque value;

2. The flow characteristics of the U-lined butterfly valve tend to be straight, and the adjustment performance is good;

3. The lining connection is convenient to install, and it can be installed vertically and horizontally;

4. The diversity of sealing materials can be selected by users;

5. The U-lined butterfly valve valve can be used as a venting valve at the pipe end, with reliable performance;

6. The valve seat sealing ring and the valve body are organically combined as a whole, so that the valve has a long service life.

Here are some 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.

There are a lot of dirty things piled up in the pipeline, so that the butterfly valve is stuck, it is recommended that the butterfly valve be removed and take a look; There are also control butterfly valve signals and butterfly valve power supply, check the D-valve type code: butterfly valve;

3-valve transmission mode code: worm gear;

4-valve connection form code: flange;

1-valve structure code: vertical plate type;

X-Seat Sealing Face or Lining Material Code: Rubber;

16-Nominal pressure value:;

Q-Body Material Code: QT400-15.

It is because of the use of "U" type sealing ring, so it must also be the center line type, so it is also called: U type center line butterfly valve. It has nothing to do with flange or clamp type.

It refers to the valve body flange is U-shaped, also known as U-shaped clamp.

Because it is the center line, the inlet and outlet ends of the valve are exactly the same, so the pressure in both directions, because its sealing pair is made of rubber and metal, and it may also be rubber-to-rubber, so its sealing performance is good.

Because after it is opened at a certain angle, the butterfly plate and the valve body are only in contact with the upper and lower valve stems, and the butterfly plate and the valve body in other places have been completely separated, so its wear is small, and the opening and closing torque is not large.

Because its sealing pair is made of rubber and metal, it may also be rubber to rubber, so its temperature resistance is not very good, the best fluorine rubber in rubber can still withstand about 200 degrees, and nitrile and EPDM can only withstand about 100 degrees at most.

Because the thickness of the butterfly plate of this valve is not very thick, and the rubber lining is also very thick, the pressure bearing capacity is not very good, and it is not suitable for high-pressure pipelines.

This is my personal opinion and can only be used for reference.

The temperature is not high, it cannot exceed 120 degrees.

Advantages of the centerline butterfly valve

The centerline butterfly valve adopts the centerline sealing structure, and the centerline of the butterfly plate seal of the butterfly valve is consistent with the centerline of the valve body and the rotary centerline of the valve stem. The upper and lower ends of the butterfly plate near the stem are designed as two smooth planes, and are in close contact with the seat liner made of rubber to ensure that the medium does not leak from both ends; The outer edge of the butterfly plate is designed as a spherical outer edge, and the arc surface should be guaranteed to have a suitable surface roughness during processing, and the valve seat liner should be guaranteed to have a suitable surface roughness when the sealing surface is molded and formed. When the valve is closed, the butterfly plate rotates 0 900, and gradually compresses the seat liner made of rubber, so that the elastic force formed by the elastic deformation of the valve seat liner is used as the necessary sealing specific pressure to ensure the sealing of the valve.

The centerline butterfly valve is designed to reduce flow resistance

1) The channel is designed as a full-bore structure, which ensures the flow area of the valve and reduces the flow resistance when the fluid passes through the valve.

2) The butterfly plate adopts a saucer-shaped streamline design, which can not only ensure the stress strength of the center of the butterfly plate, but also ensure that the valve can obtain a large flow coefficient and a small fluid resistance coefficient.

3) The design of the valve seat seal ring is a soft sealing structure of rubber and resin skeleton (fixed sleeve), which is embedded in the valve body after being made. The part of the inner ring that is higher than the inner cavity of the valve body adopts a streamlined design to achieve the purpose of reducing the flow resistance.

Disadvantages of the midline butterfly valve

Because of its own structure, the centerline butterfly valve can only be made into a soft-sealed butterfly valve, so the centerline butterfly valve can only be used in a low-pressure and room-temperature working environment, and is not suitable for high-temperature and high-pressure working conditions.

The midline butterfly valve with the clamp lining is midline sealed, and the eccentric symmetrical butterfly valve is eccentrically sealed. The sealing structure is not the same. Its functions are the same as those used, and the medium of the trial is different.

The difference is that type A is a pair clamp, LT type is a single clamp, and the connection is different.

Take, for example, the model of a turbine hard-seated butterfly valve.

The model of the turbine hard seal flange butterfly valve is D343H-16C, and the model of the turbine hard seal clamp butterfly valve is D373H-16C.

The model of the turbine hard seal butt welding butterfly valve is D363H-16C, where D stands for butterfly valve, the first 3 represents the control mode is turbine, the middle 4 represents the flange, 7 represents the clamp, 6 represents the butt welding (welding), the back of the 3rd generation butterfly valve is a triple eccentric structure, H represents the sealing surface material is alloy steel, 16 represents the nominal pressure of 16 kg, and C represents the valve body material is carbon steel.

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 rotated around the valve shaft to open and close the closing part (disc or butterfly plate) as a disc.

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.

Butterfly valves can be divided into flanged butterfly valves, swafer butterfly valves and butt welding butterfly valves according to the connection method, and the models of these two butterfly valves are also different.

1. Name: Butterfly Valve: Code D

2. Control mode code: pneumatic-6; Electric-9; Turbo-3

3, connection code: flange-4; Pair clamp-7; Welding-6

4. Structural form code: midline type-1; double eccentricity-2; Three eccentricities - 3

5. Sealing surface material code: fluoroplastic-f; alloy steel-h; cemented carbide-y; Rubber-x

6. Nominal pressure code: 10 is 10 kg; 16 is 16 kilograms.

7. Body material code: carbon steel-C; ductile iron-q; Cast Iron-Z; Stainless steel 304-p; Stainless steel 316R

For example: D341F-10C centerline carbon steel turbine flange soft seal butterfly valve.

D672Y-25P Pneumatic Clamp Double Eccentric Hard Seal Butterfly Valve, 304 stainless steel.

D963H-10R Electric Triple Eccentric Butt Welded Hard Seal Butterfly Valve, Material 316, Pressure 10kg.

What exactly are you trying to ask?

The domestic butterfly valve model such as 500D37A1X3-10QB1500 indicates the butterfly valve size, 500 mm

d stands for butterfly valve. 3 means manual head operation, 7a means clamp connection. 1 indicates the center plate type. x3 represents the seat of EPDM. 10 means that the nominal pressure is a sphere, and b1 means a ball.

d—valve type code: butterfly valve;

3-valve transmission mode code: worm gear;

4-valve connection form code: flange;

1-valve structure code: vertical plate type;

X-Seat Sealing Face or Lining Material Code: Rubber;

16-Nominal pressure value:;

Q-Body Material Code: QT400-15.