Patent ID: 6793198
Filing Date: 2004-09-21
Classification: F16K

Abstract:
A valve plug head assembly comprising:(A) a means for holding a valve plug head to a valve plug stem, having a plug stem base and a plug stem base cavity, wherein said means for holding further comprises a plug head band, fitted between said valve plug head and a recess in a side wall of said plug stem base cavity, said plug head band having a first side and a second side and having said second side fitted inside said recess in said plug stem base cavity; and a band retainer fitted over said plug head band; said valve plug head having a generally flat surface extending across and located in said plug stem base cavity and held in contact by said means for holding with said plug stem base and said plug head having a general convex surface extending outward from said plug stem base and said plug stem base cavity to thereby provide a means for said valve plug bead to entirely close off a flow path through a valve assembly, and (B) a means for fastening said means for holding to said valve plug stems wherein said means for fastening further comprises a means selected from the group consisting of a bolt, a pin, a screw, a weld, a braze, and a clamp.