What are the high pressure valves? Introduction to the material of high temperature and high pressur

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 globe valves, gate valves, and also flange connections and welded connections.

In order to improve the ability of ultra-high pressure valves to resist erosion and wear, corrosion resistant materials are usually selected:

1. Materials with high hardness.

2. Materials with acid etching resistant protective film.

3. Materials with high yield point and good stability.

4. Materials with high fatigue strength.

To improve the various properties of the material, one is to use alloying, and the other is to use appropriate heat treatment. The alloying method is to develop new materials with various special properties by changing the chemical composition of steel. The heat treatment method does not change the chemical composition of the steel, but applies different heating, heat preservation and cooling to the steel in the solid state to change the microstructure of the steel and improve the performance of the material.

1. Self-tightening sealing is used for the new structure.

Generally, when the ultra-high pressure relief valve is working, the valve disc receives an upward thrust under the action of medium pressure, and the higher the pressure in the system, the greater the upward thrust, and the lower the specific pressure of the sealing surface. And the valve is affected by the control pressure at the moment of closing, which has a great impact on the valve seat, which is easy to damage the sealing surface and reduce the service life of the valve. Self-tightening replaceable seat ultra-high pressure relief valve, the valve disc is not directly washed by the medium, reducing erosion wear.

When the valve is closed, the disc is only affected by the elastic force of the small spring, so that the impact force of the disc on the valve seat is very small, and the sealing surface is not easy to be damaged, which improves the service life of the valve. Due to its simple structure and reliable operation, it can ensure the stability of the valve when working under ultra-high pressure.

2. Wedge-shaped disc is adopted.

From the mechanical analysis, because the cone valve is a cantilever beam, under the impact of high-pressure and high-speed fluid, it is easy to produce vibration and fatigue fracture under high-frequency vibration. The spool of the wedge valve is formed by cutting the cylindrical spool on an inclined plane, the shape is equivalent to a Charpy beam from a mechanical point of view, because the lower end of the disc is close to the valve seat, so that the vibration of the disc is very small or difficult to vibrate, so compared with the cone valve, the stability of the wedge valve in the operation process is better.

In addition, the seat and outlet are designed in the shape of a venturi nozzle to reduce cavitation and flashing. Installing a flow limiting hole in front of or after the valve can absorb a part of the pressure drop, reduce the pressure drop before and after the valve, and weaken cavitation. If there is a flash phenomenon, it is not easy to use the bottom proximal side outflow direction.

The adoption of the new structure is an effective way to improve the life of the ultra-high pressure relief valve and the hydraulic pressure valve. However, the higher the pressure, the simpler the structure should be.

1.The types of valves generally do not conflict with the pressure absolutely, and the classification is also divided from a variety of perspectives; If you want to choose a high-voltage one, it mainly depends on the working conditions, what kind of function you think of, and the location of the installation.

2.There are many materials for valves, such as ceramics, plastics, glass, steel, etc., which also depends on the working conditions of the device you want to install the valve, such as the medium in the pipeline, the temperature of the medium, the operating environment, the general high-pressure valve is made of steel, such as carbon steel A105 WCB, stainless steel, F51, F91, CF8, CF3, CF8M, CF3M, CF3M, alloy steel F5, F11, F22, low temperature steel LF2, LF3, LCB, etc., The selection of these main materials and internal materials should be based on the above conditions as a reference basis.

3.The most famous manufacturers of high pressure in the domestic valve industry are Dalian Dagao Valve, China Nuclear Su Valve, Suzhou Neway, Shanghai Kaiweixi, Shenyang Shengshi, Tieling Valve, Harbin Boiler, Qingdao High School Valve, Lanzhou High School Pressure, etc. Hope it helps.

There are globe valves, gate valves, also divided into flange connection and welded connection, high-pressure valve commonly used material is 15crmog 15crmov, manufacturers, not very clear, relatively large manufacturers generally have production, Wenzhou Oubei there are a lot.

It is a flue gas butterfly valve, which can withstand a maximum temperature of 1000 degrees.

The valve (famen) is a control component in the fluid transfer system, which has the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief.

Valves for fluid control systems range from the simplest shut-off valves to the most complex valves used in automated control systems. 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. According to the material, the valve is also divided into cast iron valves, cast steel valves, stainless steel valves, etc.), chromium-molybdenum steel valves, chromium-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized and other valve materials.

Valve is a device used to control the direction, pressure, and flow of fluid in a fluid system, and is a device that makes the medium (liquid, gas, powder) in the piping and equipment flow or stops and can control its flow.

The valve is a control component in the pipeline fluid transportation system, which is used to change the channel section and the direction of medium flow, and has the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief. Valves for fluid control, from the simplest globe valves to the most complex automatic control systems used in a variety of valves, its varieties and specifications, valves from the very small instrument valve to the diameter of 10m for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluids, the working pressure of the valve can be from ultra-high pressure to 1000MPa, and the working temperature is from ultra-low temperature of -270 to high temperature of 1430.

The control of the valve can adopt a variety of transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electrohydraulic, pneumatic, spur gear, bevel gear drive, etc.; Under the action of pressure, temperature or other forms of sensing signals, it can act according to predetermined requirements, or simply open or close without relying on sensing signals, and the valve relies on a drive or automatic mechanism to make the opening and closing parts lift, slide, swing or slew movement, so as to change the size of its flow channel area to achieve its control function.

Whether it is resistant to high temperature mainly depends on the material of each part of the valve in contact with the medium, and has nothing to do with the type of valve.

What kind of valve is a gate valve with a high temperature resistance of 400 degrees?

Flue gas butterfly valve, which can withstand temperature of 1000 degrees.

It is suitable for high-temperature and high-pressure water in thermal power plants, petrochemical industry, metallurgy, etc., and water, steam, oil, and superheated steam at high temperature and high pressure in metallurgy.

On the road, cut off or turn on the medium.