Ball valve for shutting off pipes, having a floating spherical plug and radially displaceable seat rings

摘要

Ball valve (10) for the alternate shutting off of pipes (20), having a welded housing (11) with a floating spherical plug (12) welded in and having spherical seating surfaces (19) which are associated with the opposing pipe inlets (16) of the pipes (20). The floating spherical plug (12) can be moved axially into metal-to-metal sealing contact with the spherical seating surfaces (19). Assigned to the spherical seating surfaces (19) are axially displaceable seat rings (18) which can be moved freely in a radial direction. The seat rings (18) can be displaced axially with pressure rings (27, 28). <IMAGE>