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