152140 ⎘
Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary Plug valves;; Details; Features relating to lubrication for plugs with conical surfaces
AN IMPROVED CONICAL ELEMENT FOR GAS PASSAGE IN MULTI-STAGE GAS TAPS
#2Plug valve and methods
#3Plug member of gas valve
#4Plug member of gas valve
#5Plug valve with lubrication means
#6Plug valve and methods
#7Tank valve