Forged steel valve and cast steel gate valve difference, five perspectives for you

Forged steel valve and cast steel gate valve difference, five perspectives for you
Forged steel valve and cast steel gate valve look a word of difference, in fact, the difference between the two or very big, many people do not know how to choose under the circumstances of application, so forged steel valve and cast steel gate valve what is the difference? Here are five different perspectives from Like Valve. Help you master two gate valve features!

First, forging and casting are two different kinds of production technology
Casting: melt shape memory alloy filling concave die cooling. It is very easy to cause air holes in the middle of parts. After the metal material is heated and dissolved, it is poured into the sand mold or shell, and condensed into equipment after refrigeration.
Forging: mainly high temperature extrusion processing. Can optimize the crystal in the product. According to hammering and other methods, the metal material in the case of plastic becomes a product workpiece with a certain shape and size, and changes its physical characteristics.
Two, the whole process of forging and casting will cause the difference in the performance of raw materials
In the whole process of forging, metal materials through plastic deformation, has the effect of optimizing crystal, continuous laser cutting chemical fiber, so it is common in the production and manufacture of key parts of the wool embryo, such as shaft theory.
Casting has provisions on the production and processing of raw materials, pig iron, aluminum and other casting performance is generally good. Casting does not have many advantages of forging, but it can produce more complex zero, so it is common in the production of low mechanical properties of the structure of the vacancy. Such as CNC lathe housing
Three, forged steel valve and cast steel valve performance difference
1. Work pressure
Because of the difference of raw material properties, forged steel valve can bear larger impact force, plasticity, ductility and other structural mechanical properties higher than cast steel valve. Therefore, it can be applied in high pressure working conditions. Common working pressure levels for forged steel valves are: pn100.pn106.pn320.1500 LB~3500LB. The common nominal diameter of cast steel valve is N16.PN25.PN40, 150LB~900LB.
2, diameter
The aperture of forging valve is usually less than DN50 because of the high demand for mold shell and machine equipment in forging process.
3. Anti-leakage ability
Because the processing process of its own decision, casting in the production process is easy to cause trachoma, so compared with the forging process, the leakage prevention ability of the casting valve is not as good as the forging valve. And the overall forged valve, because its oil plate and flange is the overall mold shell forging, in the anti-leakage level is better than the general forged steel valve.
Therefore, forged steel valve is widely used in some areas with higher provisions on leakage prevention, such as natural gas, natural gas, crude oil, chemical plants and other fields.
4, exterior
Cast steel valve and forged steel valve in the appearance of the design is very easy to distinguish, generally cast steel valve is silver white, and forged steel valve is black gray.
Four, the main use of different
The actual selection of cast steel gate valve and forged steel valve depends on the working condition and natural environment. Can not generalize which industry with forged steel valve, which industry with cast steel valve. Should be selected according to the actual job. Generally speaking, cast steel valve can not be corrosion resistant, only for general pipelines, and forged steel valve can withstand high pressure, can be used for some high temperature processing plants, such as thermal power plants and chemical enterprises.
Five, the price
Generally speaking, the price of forged steel valve is higher than cast steel gate valve, so it is very important to choose gate valve according to the situation.