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