Preferably, the valve member is compressed within the chamber to provide the resilient bias required to move the valve member into {HEAD ~ sealing engagement} with {TAIL ~ the valve seat} 
with
Preferably , the valve member is compressed within the chamber to provide the resilient bias required to move the valve member into { HEAD ~ sealing engagement } with { TAIL ~ the valve seat }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL