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According to the official website of Shanghai Lidian solenoid valve, the second volume of the German standard DIN 2401-1977 "Pipeline Pressure Grade, Allowable Working Pressure of Steel and Cast Iron Pipe Components" is a relatively comprehensive pressure-temperature rating standard. Among them, the allowable working pressure of seamless pipes, welded pipes, flanges, valves, pipe fittings and bolts under different materials and different temperature conditions is listed. The standard includes 6 kinds of flange materials, 4 kinds of flange connection cast iron valve materials, 5 kinds of cast steel, and 5 kinds of forged steel, which are all original materials.
The steel is carbon steel and low alloy steel, excluding stainless steel. It is clearly specified in the standard that when other materials are selected that are different from the original material, the allowable working pressure is calculated according to the ratio between the strength characteristic value of the material used and the strength value of the original material at 20 specified in the standard. For the pressure-temperature rating of stainless steel materials, it is supplemented by ISO DIS70651 "Steel Flanges".
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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.
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It refers to the valve size standard, and the national standard and the German standard are not the same installation size.
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Free may not, paid can be connected:
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According to your prompts, I didn't understand too much, do you need the full text of these foreign and international standards, or do you have the full text of the standards but can't understand the content of these standards?
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German standards can. An electronic version of the German standard technical specifications can be purchased online.
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The DIN standard is a German standard, and it is estimated that foreigners will have to ask for this standard.
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The national standards of German valves should be European standards, and the design manuals of valves are generally in the design department of the valve company, which cannot be bought.
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Oubei Pump and Valve Technology Building should be able to buy.
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If you don't have it, I believe there is no other place!
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Germany Siemens**** Germany Gemu Valves Germany Arca Control Valve Company Germany Bort (Burkert) Germany Paivo International Industries Group (Power Station Valves) satisfied.
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Answer: 11I'd rather be fat and delicate than be the same thin.
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The Germans are buying valves in China, and now you want to buy German valves?
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Look for Ex valves, ** many German brands, and they are in stock.
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German valve Powerleader has a factory in Hangzhou.
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