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