How to write the American standard and the national standard copper gasket on the 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.

In fact, the application of copper gasket is not clear in the standard, it is not like metal winding gasket asbestos mat has a clear code. If it is a standard specification, you can write for example: American Standard RF 2" 150LB Write the standard on the back Just write the material There is a gasket problem++369643049 hehe.

The American standard and the national standard are just casual words.

The valve industry in this world is based on the European system and the American system, and the European system is based on the meter kilogram system.

The American embodiment is a system based on the inch pound.

China's industry was built on the basis of Soviet industry, which in turn was built on the basis of Germany. This system is the embodiment of Europe.

The American system came from the British, and later became more and more scientific with the development of American industry.

At present, there is only one standard for defining valve pressure in the world. Therefore, the American system is much more complete than that of Europe.

As for the calculations you mentioned, I don't know what they are, but the values in the standards are all developed and modified over many years through countless experiments conducted by the American National Standards Institute.

There are no special specifications between American standard valves, German standard valves, and national standard valves, which are nothing more than the difference between production standards and pressure levels, and the material of the valve body and the material of the internal parts are easy to say, nothing more than cast iron, cast steel, stainless steel, etc. Taking the American standard as an example, the American standard pressure level is from 125LB to 2500LB (or 200PSI to 6000PSI), and the standard main API, ANSI, commonly known as API, ANSI valves are American standard valves; The pressure of German standard valves is usually PN10 to PN320, using DIN standard; If it is a flange connection valve, the corresponding flange standard should also be used. The world's main valve standards are also the American Standard Petroleum Association API Standard, the American National Standard ANSI, the German Standard DINs, the Japanese Standard JIS, the National Standard GB, the European Union Standard EN, and the British Standard BS.

If the valve is marked with GB, it represents the national standard, DIN is marked, it represents the German standard, and if it is ANSI, it represents the American standard.

Each standard valve has a different shape

The shape of each standard valve is different, and there is a mark on the valve, you take a closer look.