1. The element content of the two materials is different, and the biggest difference is the carbon content.
2. Carbon steel valve (cast steel valve) is divided into low carbon steel, medium carbon steel, high carbon steel, etc., the higher the pressure resistance, the stronger the temperature resistance.
3. Cast iron valves are divided into gray cast iron, malleable cast iron, nodular cast iron, vermicular cast iron and alloy cast iron. These casting special gray cast iron plasticity is the worst, generally only used for drainage system and other low pressure, room temperature pipe use.
4 carbon steel valve (cast iron valve) can be manufactured high pressure valve and high temperature resistance valve, the pressure can be 1.0MPa~42MPa. The temperature ranges from -20℃ to 425℃. Cast iron valves can only be manufactured for low pressure valves. The pressure ranges from 0.1MPa to 1.6MPa, and the temperature ranges from -° C to 120 ° C.
5 general carbon steel valve (cast steel valve) paint is mainly sprayed and is paint, and cast iron valve is basically most of the painted, black, also have paint.
6. The seal of cast iron valve is basically copper seal T and body seal T structure, and the seal of carbon steel valve (cast steel valve) is basically stainless iron H seal.
7. Cast iron valve is easy to break, when the flange is too tight, it will also break, and it is easy to break in transportation. This is rarely the case with carbon steel valves and cast steel valves.
8. Carbon steel valve (cast steel valve) can be welded, cast iron valve can not be welded.
9. The cost difference between the two valves is relatively large, and the cost of cast iron valve is lower.
10. The use of cast iron can only be used with low pressure, room temperature conditions, such as urban construction, basement drainage, irrigation and other systems. And carbon steel valve (cast steel valve is more widely used in power plants, chemical industry, smelting, coal mining, etc., can also be used for urban construction, basement drainage, irrigation and other pipeline system, medium range is more extensive, can be used for water, steam, oil, etc.
11. Cast iron can be used in the casting process, and carbon steel can be used in the casting process, forging process, welder can be.
