Ball valves forging and casting casting difference: This is a traditional ball valve processing methods, it requires a complete melting, casting and other equipment, but also requires a larger plant and more workers, investment, process more complex production process, and pollution of the environment, workers' skill levels of each process directly affect the quality of the product, the ball capillary leak still can not completely solve the problem, but the rough allowance big waste, often in the process casting defects found it scrapped due to increased product cost, quality can not be guaranteed, this method should not be used factory. Forging method: This is another method used by many domestic enterprises valve, which has two processing methods: one is to use round off the heating spherical solid forged blanks, and then machining. The second is the cutting in a circular stainless steel plate on large presses molded to give hollow hemispherical blank, and then welded into ball blank is machined. Blank blank sphere of relations is not the raw material, it can also mean that a part of the finished product before the ball unfinished. Ball rough forging, casting and steel plate welded. Casting: Casting ball usually used to billet and other products; forged pieces: sawing or materials, under gas cutting and other methods, such as ceramics rough, rough room. Materials are provided: A105,304,304L, 316,316L, LF2,42CrMo, 1Cr13, F51, Mone1,17-4PH so on.