There are many kinds of materials for valve body, which are suitable for different working conditions.
1, grey cast iron, suitable for working temperature between -15 ~ +200 ℃, nominal pressure PN ≤ 1.6MPa low pressure valves.
2,Black malleable cast iron, applicable to the working temperature between -15 ~ +250 ℃, nominal pressure PN ≤ 2.5MPa low pressure valves.
3,Ductile cast iron, suitable for working temperature between -30 ~ +350 ℃, nominal pressure PN ≤ 4.0MPa medium and low pressure valves.
4, carbon steel (WCA, WCB, WCC), applicable to the operating temperature of -29 ~ +425 ℃ between the medium and high-pressure valves, of which 16Mn, 30Mn operating temperature of -40 ~ +450 ℃, often used in place of ASTMA105.
5, low-temperature carbon steel (LCB), suitable for operating temperature between -46 ~ +345 ℃ low-temperature valve valve.
6, alloy steel (WC6, WC9), applicable to the operating temperature of -29 ~ +595 ℃ between the non-corrosive medium of high-temperature and high-pressure valve; WC5, WC12 applicable to the operating temperature of -29 ~ +650 ℃ between the corrosive medium of high-temperature and high-pressure valve.
7, austenitic stainless steel, suitable for working temperature between -196 ~ +600 ℃ corrosive medium of the valve.
8, Monel alloy, mainly applicable to valves containing hydrogen and fluorine media.
9, cast copper alloy, mainly applicable to the working temperature of -273 ~ +200 ℃ between the oxygen pipeline valve.
The above list is the valve body of commonly used materials in the broad categories, specific materials in each category, there are many different grades, a variety of different grades and apply to a variety of different pressure levels. Therefore, in the selection of valve body materials, should be based on different uses and different pressure levels, to determine the valve body materials suitable for the needs of the working conditions.
In addition, the valve body materials are titanium alloy (titanium valve), aluminium alloy (aluminium valve); plastic (plastic valve); ceramic (ceramic valve) and so on.