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