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.

and under the condition of meet the above conditions, want to have a lower cost. Pneumatic valve stem material



pneumatic valve rod 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.

material has the following several kinds of commonly used pneumatic valve rod. A, carbon steel,



for low and medium temperature not to exceed ℃ water, steam medium, generally choose A ordinary carbon steel.

used for medium and medium temperature not to exceed ℃ water, steam, generally choose quality carbon steel.

2, 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 in high pressure, medium temperature not to exceed ℃ medium such as water, steam, can choose CrMoALA permeability

nitrogen steel.

used in high pressure, medium temperature not to exceed ℃ steam medium, generally choose molybdenum CrMoVA chrome vanadium steel.

3, 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.

4, heat-resistant steel

used in medium temperature not to exceed ℃ high temperature pneumatic valves, can choose CrSiMo markov body heat resistant steel and CrNiWMo austenite heat resistant steel.