What are the classifications of telescopic butterfly valves, and what are the characteristics of tel

1) Center seal butterfly valve.

2) Single eccentric sealed coal valve.

3) Double eccentric sealed butterfly valve.

4) Triple eccentric sealed butterfly valve (1) Soft sealed butterfly valve.

1) The sealing pair is composed of non-metallic soft materials to non-metallic soft materials.

2) The sealing pair is composed of metal hard material to non-metal soft material.

2) Metal hard seal butterfly valve. The sealing pair is composed of a hard metal material to a hard metal material. (1) Forced sealing butterfly valve.

1) Resilient sealed butterfly valve. The specific pressure of the seal is generated by the elasticity of the seat or disc when the valve is closed.

2) External torque seal butterfly valve. The sealing pressure is generated by the torque applied to the valve shaft.

2) Pressure sealing butterfly valve. The specific pressure of the seal is generated by the pressurization of the elastic sealing element on the seat or disc.

3) Automatic sealing butterfly valve. The sealing specific pressure is automatically generated by the pressure of the medium. (1) Vacuum butterfly valve. Butterfly valves with working pressures lower than those of the standard stack atmospheric calendar.

2) Low-pressure butterfly valve. Nominal pressure PN<1 6MPa butterfly valve.

3) Medium pressure butterfly valve. The nominal pressure pn is 2 5--6 4MPa butterfly valve.

4) High pressure disc valve. Butterfly valve with nominal pressure pn.

5) Ultra-high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa. (1) High temperature butterfly valve. T>450 C butterfly valve.

2) Medium temperature disc valve. 120 c<>

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.

The telescopic butterfly valve has the characteristics of compact structure, small size, light weight, low raw material loss, small stool size, fast power switch, 90° reciprocating rotation, small driving torque, etc., which is used to disconnect, access and adjust the material in the pipeline, and has good fluid control characteristics and closing sealing characteristics. When the telescopic butterfly valve is in the open position, the thickness of the telescopic butterfly touching the crude eggplant valve is the frictional resistance when the medium flows through the oil circuit plate, so the gas pressure formed through the valve is not large, so it has a strong flow monitoring characteristic. Elastic sealing valve, the sealing ring can be embedded in the oil circuit plate and near the attached butterfly plate.

The telescopic butterfly valve is made of metal and the valve is generally longer than the elastic sealed valve, but it is difficult to seal. Metal seals are adapted to relatively high operating temperatures, while elastic seals are limited by air temperature.

Butterfly Valves - Classification.

1. Classified according to the structural form: (1) central seal butterfly valve, (2) single eccentric seal butterfly valve, (3) double eccentric seal butterfly valve, (4) triple eccentric seal butterfly valve.

2 Classification according to the material of the sealing surface: (1) Soft seal butterfly valve. 1) The sealing pair is composed of non-metallic soft materials to non-metallic soft materials. 2) The sealing pair is composed of metal hard material to non-metal soft material.

2) Metal hard seal butterfly valve. The sealing pair is composed of a hard metal material to a hard metal material. 3. Classification according to sealing form: (1) forced sealing butterfly valve 1) elastic sealing butterfly valve.

The sealing specific pressure is generated by the elasticity of the valve seat or valve plate when the valve is closed, and the valve seat or valve plate is 2) plus torque to seal the butterfly valve. The specific pressure of the seal is generated by the torque applied to the valve shaft (2) Pressure seal butterfly valve. The sealing specific pressure is generated by the pressure of the elastic sealing element on the valve seat or valve plate.

The sealing specific pressure is automatically generated by the pressure of the medium.

4 Classification by working pressure (1) Vacuum butterfly valve. Butterfly valves with working pressures lower than those of the standard stack atmospheric calendar. 2) Low-pressure butterfly valve.

Nominal pressure PN<1 6MPa butterfly valve. 3) Medium pressure butterfly valve. The nominal pressure pn is 2 5--6 4MPa butterfly valve.

4) High pressure butterfly valve. Butterfly valve with nominal pressure pn. 5) Ultra-high pressure butterfly valve.

Butterfly valve with nominal pressure PN>100MPa. 5 Classification according to working temperature: (1) High temperature butterfly valve. T 450 C butterfly valve (2) medium temperature butterfly valve.

120 C t 450 C butterfly valve (3) Normal temperature butterfly valve. A 40c t<; 120 C butterfly valve (4) cryogenic butterfly valve. A 100 t a 40 C butterfly valve (5) ultra-low temperature butterfly valve.

T 100 C butterfly valve 6 is classified according to the connection method: (1) pair clamp butterfly valve. (2) Flanged butterfly valve. (3) Lug butterfly valve.

4) Welded butterfly valve.

Structural classification of butterfly valves: centerline to clamp butterfly valves, centerline flange butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves, variable eccentric butterfly valves, soft seal butterfly valves, hard seal butterfly valves.

The drive classification of butterfly valves: handle, worm gear, electric, pneumatic, electromagnetic, electrohydraulic, electrohydraulic, hydraulic, gas-hydraulic.

There are clamp-type butterfly valves and flange butterfly valves, manual, pneumatic, electric, [Zhengzhou Xingyang Water Supply Equipment General Factory].

When it comes to the material of the valve body, the material of the raft, the rubber, the shaft, the price is also different.

A butterfly valve is a kind of valve that uses a round disc plate as an opening and closing part and rotates with the valve stem to open, close and adjust the fluid passage. The disc plate of the butterfly valve is installed in the diameter direction of the pipe. Earlier applications started with air volume regulation baffles on flues or chimneys, but also in low-pressure systems such as ventilation or air supply.

In recent years, the metal seal butterfly valve has developed rapidly, with the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance, and high-strength alloy materials in butterfly valves, the metal seal butterfly valve has been widely used in high temperature, low temperature, strong erosion and other working conditions, and partially replaced the globe valve, gate valve and ball valve.

There are many types of butterfly valves, which can be divided into the following four types according to the structural form (the position of the stem rotation centerline is different).

1. Central butterfly valve: the shaft of the valve stem, the center of the disc plate and the center of the valve body and the center of the valve body are in the same position;

2. Single eccentric butterfly valve: the shaft of the valve stem deviates from the center of the disc plate;

3. Double eccentric butterfly valve: the shaft of the valve stem deviates from the center of the disc plate and the center of the valve body;

4. Triple eccentric butterfly valve: on the basis of double eccentricity, the center line of the conical sealing surface and the center line of the valve body are deflected at an angle.

There are many ways to classify butterfly valves, and they are divided into soft seal butterfly valves and hard seal butterfly valves according to their sealing materials.

Soft Seal Butterfly Valve: The sealing pair is composed of non-metallic soft materials to non-metallic soft materials, or metal hard materials to non-metallic soft materials.

Hard Seal Butterfly Valve: The sealing pair is composed of a metal hard material against a metal hard material.

Difference Between Soft Seal Butterfly Valve and Hard Seal Butterfly Valve:

1. Soft seal butterfly valves are mostly centerline type hard seals, and most of them are single eccentric, double eccentric, and triple eccentric butterfly valve structures.

2. Soft seal is used in room temperature environment. Hard seals can be used in low temperature, normal temperature, high temperature and other environments.

3. The soft seal is used for low pressure-normal pressure, and the hard seal can also be used for medium and high pressure 4. The sealing performance of the soft seal and the triple eccentric hard seal butterfly valve is relatively good, and the triple eccentric butterfly valve can maintain a good seal in the high pressure and high temperature environment.

Because of their different characteristics, soft seal butterfly valves are suitable for two-way opening and closing and adjustment of ventilation and dust removal pipelines, water treatment, light industry, petroleum, chemical and other industries. Hard seal butterfly valves are mostly used in heating, gas supply, gas, oil, acid and alkali environments.