What are the main varieties of butterfly valves? What are the types of butterfly valves?

The main varieties of butterfly valves are: ordinary butterfly valves, soft-sealed butterfly valves (PTFE, rubber sealing rings, the leakage is very small), eccentric butterfly (two eccentric or triple eccentric), high-temperature butterfly valves, high-pressure butterfly valves, low-torque butterfly valves, etc. The valve plate of butterfly valve is flat shape, S-shaped, fishtail shaped, etc.

1. Classification according to structural form.

1) Center seal butterfly valve.

2) Single eccentric sealed butterfly valve.

3) Double eccentric sealed butterfly valve.

4) Triple eccentric sealed butterfly valve.

2. Classification of sealing surface material.

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.

3. Classification according to the sealing form.

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.

4. Classified according to 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. Classified according to working temperature.

1) High temperature. T>450 °C butterfly valve.

2) Medium temperature butterfly valve. 120 c3) room temperature butterfly valve. A 40c4) cryogenic butterfly valve. A 1005) ultra-low temperature butterfly valve. T "A 100 °C butterfly valve.

6. Classified according to the connection mode.

1. Clamp-on butterfly valve.

2. Flanged butterfly valve.

3. Lug butterfly valve.

4. Welded 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, 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 the user's stove.

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 changing rapidly, and the rankings may vary by time and region. For the latest ranking information, it is recommended to refer to industry reports, professional institutions or market research data for more detailed and accurate information.

1. According to the national standard standard, there are 6 kinds of butterfly valves: national standard butterfly valve, American standard butterfly valve, German standard butterfly valve, Japanese standard butterfly valve, British standard butterfly valve, German standard butterfly valve.

2. According to the sealing form, butterfly valves are divided into two types.

1) Forced sealing butterfly valve.

1) Resilient sealed butterfly valve. The seal specific pressure barrier is caused 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.

3. According to the working pressure, there are 5 kinds of butterfly valves.

1) Vacuum butterfly valve, a butterfly valve whose pressure is lower than the standard atmospheric pressure.

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

3) Medium pressure butterfly valve, pressure PN2 5--6 4MPa butterfly valve.

4) High pressure butterfly valve, pressure PN10--80MPa butterfly valve.

5) Ultra-high pressure butterfly valve, butterfly valve with pressure PN>100MPa.

Fourth, according to the driving mode, there are 4 kinds of butterfly valves, electric butterfly valves, pneumatic butterfly valves, hydraulic butterfly valves, and manual butterfly valves.

5. According to the structural form, there are 4 kinds of butterfly valves: central seal butterfly valve, single eccentric sealed butterfly valve, double eccentric sealed butterfly valve, and triple eccentric sealed butterfly valve.

6. According to the material of the sealing surface, there are 2 kinds of butterfly valves

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.

7. According to the working temperature, there are 5 kinds of butterfly valves

1) High temperature, T>450 °C butterfly valve.

2) Medium temperature butterfly valve. 120 c3) room temperature butterfly valve. A 40c4) cryogenic butterfly valve. A 1005) ultra-disturbing cryogenic butterfly valve. T "A 100 °C butterfly valve.

8. According to the connection method, there are 5 kinds of butterfly valves: clamp butterfly valve, flange butterfly valve, lug butterfly valve, welded butterfly valve, and clamp butterfly valve.

1. According to the national standard standard, there are 6 kinds of butterfly valves: national standard butterfly valve, American key dry standard butterfly valve, German standard butterfly valve, Japanese standard butterfly valve, British standard butterfly valve, German standard draft Chang butterfly valve. 2. According to the sealing form, butterfly valves are divided into two types.

1) Forced sealing butterfly valve. Sold (2) Pressure-filled sealed butterfly valves. 3) Automatic sealing butterfly valve.

There are many imported butterfly valve brands on the market, and some of the main ones are listed below:

1.Siemens: Siemens is a globally recognized conglomerate with several sub-brands, including Siemens' Industrial Automation & Drive Technology division for high-quality butterfly valve products.

2.Belkin: Headquartered in Zurich, Switzerland, Belkin is one of the world's leading manufacturers of intelligent control systems and actuators, including all types of butterfly valves.

3.Eaton: Eaton is an Ohio-based company that manufactures and sells a wide range of automation control equipment, such as butterfly valves, pneumatic actuators, and more.

4.Dewitte: Dewitte is a Belgian-based company that specializes in the design and production of various types of butterfly valve products.

5.Armstrong: Armstrong is a Toronto, Canada-based company that provides a wide range of piping system solutions and manufactures high-quality butterfly valves and other fluid control equipment worldwide. Gao's.

The above are only some of the imported butterfly valve brands, there are many other high-quality brands on the market to choose from. When purchasing, users should evaluate and choose according to their own needs and actual conditions.