Forged steel globe valve has three valve cover design form. The first one is bolted bonnet, according to this design in the form of valve design, the valve body and bonnet connection with bolts and nuts, spiral wound gasket (316 folders flexible graphite manufacturing ) sealed when customers have special requirements can be used to connect the metal ring. the second design is the welded bonnet, according to this design in the form of valve, the valve body and bonnet with a threaded connection, fully welded sealed. customers special requirements may also be connected through welding. the third is self-sealing valve cover, according to this design form design of the valve body and bonnet with its threaded connections, the internal pressure from tight ring seal .
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