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