What is the difference between cast iron gate valve and cast steel gate valve

Both cast iron gate valves and cast steel gate valves are commonly used types of gate valves. If you have some knowledge of valves, you should know that cast iron gate valves are mostly used in water supply and drainage pipelines, while cast steel gate valves are mostly used in petrochemical and other fields. So besides these, what is the difference between cast iron gate valve and cast steel gate valve? In this article, Bundor Valves will start with cast iron and cast steel, and introduce the difference between cast iron gate valves and cast steel gate valves.

The pressure rating of cast iron gate valves is below 1.6Mpa, while the pressure rating of cast steel gate valves is above 1.6Mpa, so cast iron gate valves are often used in low pressure pipelines, and cast steel gate valves are used in medium and high pressure pipelines. This is because the carbon content of cast iron and cast steel is different, and the carbon content directly affects the strength and plasticity of steel.

1. The cast steel material is shiny, the cast iron is dark and gray, the gray iron in the cast iron is different from the ductile iron, and the ductile iron is brighter than the gray iron.
2. The density of cast steel castings is high, and the particles are generally invisible to the naked eye. Particles can be seen in both grey iron and ductile iron. Gray iron particles are larger.
3. The sound of the collision of cast steel is "just", and the sound of cast iron will be a little dull.
4. The surface of the steel casting is rough, the riser and the gate area are large, and must be removed by gas cutting. Cast iron is continuously cut with gas cutting.
5. The toughness of steel castings is close to that of steel plates, while the toughness of cast irons is worse.

The different valve body materials of cast iron gate valve and cast steel gate valve are doomed to different working conditions of the two valves. Therefore, we must pay attention to different working conditions and environments corresponding to different materials when selecting gate valves. If you still have questions, you can consult Bundor Valves.