a main spring in said main valve chamber with one end bearing against said main valve means and {HEAD ~ its other end bearing} against {TAIL ~ said body} and tending to force said main valve means away from said seat, 
a main spring in said main valve chamber with one end bearing against said main valve means and { HEAD ~ its other end bearing } against { TAIL ~ said body } and tending to force said main valve means away from said seat ,
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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH