What is the difference between cast valves and forged valves, and which one is better?
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At what size valves is cast steel used? At what age should forging be used?
One is a valve made by casting, and the other is a valve made by forging; obviously, the strength of the forged valve is greater than that of the cast one. Generally, valves with larger diameters are made from forgings.
Cast valves are valves that are produced through casting processes. Generally, cast valves have relatively low pressure ratings (such as PN16, PN25, PN40), although there are also high-pressure versions with ratings up to 1500 lb and 2500 lb); their diameter is usually above DN50. Forged valves are produced through forging; they are generally used in high-grade pipelines, have relatively small diameters, and are usually below DN50.
Choose the one with the best cost-performance ratio based on the specified pressure range. If asked which one is better, choosing the valve suitable for the highest pressure is the best option.
They said downstairs that the larger sizes are cast? Contradiction?