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