An actuator rod is axially movable by the diaphragm in {HEAD ~ response} to {TAIL ~ a predetermined pressure} in the cavity 
to
An actuator rod is axially movable by the diaphragm in { HEAD ~ response } to { TAIL ~ a predetermined pressure } in the cavity
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH