Re opening of the main valve is accomplished with {HEAD ~ the aid} of {TAIL ~ a bypass system} connecting the upstream side of the metering valve to the main valves first chamber 
of
Re opening of the main valve is accomplished with { HEAD ~ the aid } of { TAIL ~ a bypass system } connecting the upstream side of the metering valve to the main valves first chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH