Hydraulic Valve Body Commonly Used Material
Hydraulic valve body commonly used material
1. Grey cast iron
Gray cast iron valve for its low price, wide application and application in various fields of industry. They are usually used in the case of water, steam, oil and gas as a medium and are widely used in chemical, printing and dyeing, oiling, textile and many other industrial products with little or no effect on iron pollution.
Applicable to the working temperature between -15 ~ 200 ℃, the nominal pressure PN ≤ 1.6MPa low pressure hydraulic valve body.
2. Black heart malleable cast iron
Applicable to the working temperature between -15 ~ 300 ℃, the nominal pressure PN ≤ 2.5MPa in the low-pressure hydraulic valve body. Applicable medium for water, sea water, gas, ammonia and so on.
3. Ductile iron
Ductile iron is a kind of cast iron, this cast iron, lumps or spherical graphite to replace the gray cast iron in the flake graphite. This change in the internal structure of the metal makes it more mechanical than ordinary gray cast iron, and does not damage other properties. Therefore, the hydraulic valve body made of ductile iron is more pressure than the hydraulic valve body made of gray cast iron. Applicable to the working temperature between -30 ~ 350 ℃, the nominal pressure PN ≤ 4.0MPa in the low-pressure hydraulic valve body.
Applicable medium for water, sea water, steam, air, gas, oil and so on.
4. Carbon steel
(WCA, WCB, WCC) was originally developed for the production of cast steel to meet the production needs beyond the capacity of cast iron valves and bronze valves. However, due to the overall performance of carbon steel valve is good, and by the thermal expansion, impact load and pipeline deformation stress generated by the strong resistance, so that its use to expand, usually including the cast iron valve and bronze hydraulic valve body Working conditions.
Applicable to the working temperature between -29 ~ 425 ℃ between the high pressure hydraulic valve body. Which 16Mn, 30Mn for the temperature between -40 ~ 400 ℃, commonly used to replace ASTM A105. Applicable medium for saturated steam and superheated steam. High temperature and low temperature oil, liquefied gas, compressed air, water, natural gas and so on.