An actuation member is disposed within the body and responsive to {HEAD ~ a fluid pressure} to cause {TAIL ~ the flow control member} to move between the first and second positions 
to cause
An actuation member is disposed within the body and responsive to { HEAD ~ a fluid pressure } to cause { TAIL ~ the flow control member } to move between the first and second positions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH