A floating valve assembly, operated by the shaft and aligned by {HEAD ~ the shaft}, is mounted on the outside of the housing on projections which flexibly support a valve stator containing {TAIL ~ vacuum ports} 
A floating valve assembly , operated by the shaft and aligned by { HEAD ~ the shaft } , is mounted on the outside of the housing on projections which flexibly support a valve stator containing { TAIL ~ vacuum ports }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL