Ball valve having an improved ball element design
Butterfly valve with plural-fence modulator plate
Change-over valve means for a hydraulic clutch of the marine pro
Disk valve
Eccentric rotary valve with control-improving wing member
Flow stabilized, retractable seal, double-block and bleed plug v
Low torque control valve
Non-locking tapered plug valve
Tapered plug valve
Valve ball configuration
Valve for closing the fluid passage of a well bore tubular membe