The orifice means provides means to divide the pump flow in {HEAD ~ a suitable ratio} for providing a regulated portion and {TAIL ~ another remaining portion} 
for providing
The orifice means provides means to divide the pump flow in { HEAD ~ a suitable ratio } for providing a regulated portion and { TAIL ~ another remaining portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL