The differences between forged valves & casted valves
Forging and casting are two main ways to manufacture industrial valves. Both methods require the application of high temperature to steel raw materials and machining work at the end of the process to obtain the final product.
Casted valves are made from liquid form of metal. The solid metal is melted into liquid and poured into molds. When it cools and solidifies, the casting is taken out from the mold to further machining. Compared to forgings, there easily appears internal or external defectiveness on castings.
When is the casted valve preferred?
-Large size valves.
-Valves with complex shape and structure.
-Special alloy valves.
are created by shaping metals and alloys when they're in solid state. Compared to castings, forgings offer perfect uniformity of chemical composition and structure. They are stronger and more reliable than castings.
When is the forged valve preferred?
-Small size valves.
-Valves with high pressure and temperature.