Please show details, steps and where numbers are coming from.
The pump power is 3.73 kw. Its flow rate is 0.002 m3/s. Pipe inner diameter is 25 mm. The specific gravity of the hydraulic oil is 0.9. The height between point 1 and point 2 is 5 m. There is a pressure gage at point 2 (before the hydraulic motor inlet) and its gage pressure is 1800 kPa. Please find the head loss between point 1 and point 2.