A so-called stainless steel valve is a valve, mainly made of stainless steel, which regulates the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. The types of stainless steel used in the body of a valve are 301, 304, 316, 304L and 316L. According to international standards, they also can be classified into CF8, CF3, CF8M and CF3M. There are all kinds of the stainless steel valves, such as gate valve, ball valve, butterfly valve, check valve, plug valve, needle valve, baiting valve, steam trap, air-operated valve and so on.
As far as we know, stainless steel is a common name for metal alloys that consist of 10.5% or more Chromium (Cr) and more than 50% Iron (Fe). The chromium content in stainless steel alloys is what generally prevents corrosion. It helps to procrastinate the iron to rust by oxygen and water. It works by reacting with oxygen to form a tough, adherent, invisible, passive layer of chromium oxide film on the steel surface. Besides, the additions, such as nickel are used to raise the general corrosion resistance required in more aggressive usage or conditions.
Because of these components, it is famous for its resistance to corrosion and staining, low maintenance, relatively low cost, and familiar luster and it is an ideal base material for a host of commercial applications, especially for valve application. On basis of properties of the stainless steel, stainless steel valve has the features of corrosion-proof, rust-proof, water-proof and durability.
Therefore, it is widely used in a lot of industries where the resistance to corrosion is required, such as chemical, petrochemical, oil, paper-making, mine, electricity, gas, food, pharmaceutical, water supply, mechanical equipment, electronic, urban construction and so on.
Nowadays, stainless steel valves have been the necessary products in all kinds of fields. However, there are only a few valve manufacturers who reach the international standard. So when people purchase this valve, they must require the seller to show the certifications for production. Through this way people can avoid buying the unqualified products. What’s more, this valve from Japan, Germany, U.S., U.K. and Shanghai in China are the better choices for purchasers, because most of them from the above places are in line with international standards. As for the famous brands, there are Kitazawa of Japan, Venn of Japan, Top of Germany, VTON of U.S. and Shanghai Xiandie valve in China.
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