Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve and actuator for operating valves and the like
Ball valve and method of assembly
Ball valve and seat assembly
Ball valve and seat assembly
Ball valve having a magnetic seat sealing device
Ball valve having improved seal means
Ball valve having retractable sealing member
Ball valve mechanism
Ball valve provided with a lock ring
Ball valve seat arrangement
Ball valve seat assembly having a removably mounted face seal in
Ball valve seat for high temperature service
Ball valve structure
Ball valve with a ceramic valve ball and ceramic seat rings