NAFCO | Choose the Right Material Valves According to Flow Media From: NAFCO- China Brass Valves and Brass Fittings China Manufacturers Many flow media have a certain corrosive; the same medium with pressure, temperature and concentration changes of its corrosivity is also different. Therefore, the material should be based on corrosion resistance, choose the appropriate valve for the medium. 1, Stainless Steel Valves Stainless steel valve resistance to atmospheric excellent, resistant to nitric acid and other oxidizing media, but also alkali, water, salt, organic acids and other organic compounds corrosion. But not resistant to sulfuric acid, hydrochloric acid and other non-oxidizing acid corrosion, nor resistant to dry hydrogen chloride, oxidative chloride and oxalic acid, lactic acid and other organic acids. Containing molybdenum 2% to 4% of stainless steel, such as Cr18Ni12Mo2Ti, its corrosion resistance than chromium-nickel stainless steel is more superior, its non-oxidiz