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The Difference Between The Casting Body And The Forged Valve Body
Sep 29, 2017

Casting the valve body is the casting of the valve, the general casting of the valve pressure levels are relatively low (such as PN16, PN25, PN40, but also high pressure, can go to 1500Lb ,, 2500Lb), caliber most of the DN50 or more.

Forged Valve Body is forged out, are generally used in the pressure level of the pipeline, the caliber is relatively small, generally below DN50. 1. Valve casting:

1. Casting is the melting of the metal into a certain requirements of the liquid and poured into the mold, the cooling and solidification. After finishing to get a predetermined shape, size and performance of the casting (parts or rough) process. Modern machinery manufacturing The basic process of industry.

2. Casting production of rough cost is low, for the shape of complex, especially with complex cavity parts, can show its economy; at the same time it is more adaptable, and has a good overall mechanical properties.

(Such as metal, wood, fuel, molding materials, etc.) and equipment (such as metallurgical furnace, sand mixer, molding machine, core machine, sand machine, shot blasting machine, cast iron plate, etc. ) More, and will produce dust, harmful gases and noise and pollute the environment.

4. Cast a lot of types, according to the modeling method is divided into: ① ordinary sand casting, including wet sand type, dry sand and chemical hardening sand type. ② special casting, according to the shape material can be divided into natural mineral gravel as the main molding materials of special casting (such as investment casting, mud casting, casting workshop shell casting, negative pressure casting, solid casting, ceramic casting Etc.) and special casting materials (such as metal casting, pressure casting, continuous casting, low pressure casting, centrifugal casting, etc.) with metal as the main casting material.

5. Casting process usually includes: ① mold (the liquid metal to become a solid casting containers) preparation, according to the use of materials can be divided into sand type, metal type, ceramic type, mud type, graphite type, according to the number of times can be divided (Casting alloy) mainly cast iron, cast steel and cast nonferrous alloy; casting metal, ③ Casting treatment and inspection, casting processing, including removal of core and casting surface foreign body, remove the riser, shovel burr and pecking and other protrusions and heat treatment, plastic surgery, rust treatment and rough processing.

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