Pneumatic pneumatic valve pneumatic valve stem choose to have any special requirements

manufacturing pneumatic valve parts of materials to choose according to the following factors:, pressure, temperature, and the properties of working medium. , force situation of the parts, and play a role in the structure of pneumatic valve. And has good manufacturability. , under the condition of meet the above conditions, want to have a low cost. Pneumatic valve pneumatic valve stem rod materials in the process of pneumatic valve opening and closing, pull, pressure and under torsional force, and direct contact with the media, and packing friction and relative movement between at the same time, so the pneumatic valve stem material must ensure that the specified temperatures have sufficient strength and impact toughness, has certain corrosion resistance and abrasion resistance, and good manufacturability. There are several commonly used pneumatic valve rod materials. A, carbon steel, low and medium temperature does not exceed ℃ for water and steam medium, generally choose A ordinary carbon steel. Used for medium and medium temperature not to exceed ℃ water, steam, generally choose quality carbon steel. Second, the alloy steel used for medium and high pressure, medium temperature not to exceed ℃ medium such as water, steam, oil, generally choose Cr ( Chrome steel) 。 Used for high pressure, medium temperature not to exceed ℃ medium such as water, steam, can choose CrMoALA nitriding steel. Used for high pressure, medium temperature not to exceed ℃ steam medium, generally choose molybdenum CrMoVA chrome vanadium steel. Three, acid-proof stainless steel used in medium and high pressure, medium temperature does not exceed ℃ of corrosive medium and weak corrosive medium, can choose Cr, Cr, Cr chromium stainless steel. When used in corrosive medium, can choose CrNi, CrNiTi, CrNiMoTi, CrNiMoTi stainless acid-resistant steel and PH - Mo precipitation hardened steel. Four, heat resistant steel used in medium temperature not to exceed ℃ high temperature pneumatic valves, can choose CrSiMo martensite heat-resistant steel and heat resistant steel CrNiWMo austenite size size.