What is the difference between cast iron valves and cast steel valves
Cast iron valves are mostly used in water supply and drainage pipelines, while cast steel valves are mostly used in fields such as petrochemicals.
The pressure rating of cast iron valves is below 1.6Mpa, while the pressure rating of cast steel valves is above 1.6Mpa. Therefore, cast iron valves are often used in low-pressure pipelines, while cast steel valves are used in medium and high-pressure pipelines. This is because the carbon content of cast iron and cast steel materials is different, and the carbon content directly affects the strength and plasticity of the steel.
1. The material of cast steel is shiny, while cast iron is dark and gray. The gray iron inside cast iron is different from ductile iron, and ductile iron is brighter than gray iron.
2. Cast steel castings have high density and particles are generally not visible to the naked eye. Both gray iron and ductile iron can see particles. Grey iron particles are larger.
3. The sound of collision in cast steel is "hard", while the sound of cast iron will be a bit muffled.
4. The surface of steel castings is rough, and the area of risers and gates is large, which must be removed by gas cutting. Cast iron is continuously cut by gas cutting.
5. The toughness of steel castings is similar to that of steel plates, while the toughness of cast iron is poorer.
The different valve body materials of cast iron valves and cast steel valves determine the different operating conditions of the two types of valves. So when selecting valves, we must pay attention to different working conditions and environments corresponding to different materials.