A fluid seal assembly for a rotary valve comprising a valve housing having a cylindrical valve opening and {TAIL ~ a rotary valve sleeve} in {HEAD ~ said valve opening} 
A fluid seal assembly for a rotary valve comprising a valve housing having a cylindrical valve opening and { TAIL ~ a rotary valve sleeve } in { HEAD ~ said valve opening }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD