Rubber joint consists of flange and a sphere carbon steel.Flange categorized forged and cast steel, forging is better than cast steel. General rubber sphere has two kinds of processing technology, mold and die. Gas model better. Choose according to their own actual situation. If they are for my own use pay attention to real benefit, it is recommended that the cast steel gas model, if it is a big engineering requirement is higher, suggest using the forging die. A few years ago are made of cast steel die hard, demand is not high, this can also be used.
