The seal also acting to retain the valve member within the housing and in which the housing defining end portions which extend axially away from the valve member at any position of {HEAD ~ the valve member} between {TAIL ~ the open and closed positions} 
between
The seal also acting to retain the valve member within the housing and in which the housing defining end portions which extend axially away from the valve member at any position of { HEAD ~ the valve member } between { TAIL ~ the open and closed positions }
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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL