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