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Description:Valves are available in gate three bonnet designs. The first design is the bolted bonnet with male-female joint, spiral wound gasket, made in F304L/graphite. Ring joint gaskets are also available on request. The second design is the welded bonnet, with a threaded and seal welded joint. On request a full penetration strength welded joint is available. The third design is the pressure seal bonnet, with a threaded and pressure seal bonnet joint.