Hydraulic Pump - Required Shaft Power
Shaft power for a hydraulic pump delivering a given flow at a specific pressure - P = Q·p/η.
Hydraulic power
125.00kW
Shaft power
156.25kW
Formula, assumptions, and limits
Q in L/min, p in bar gives kW directly (600 factor). Piston pumps 88–92 % total eff; vane 80–85 %; gear 75–85 %. Derate 5 % for cold oil start.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Volumetric flow | L/min | pump spec | |
| Working pressure | bar | relief setting | |
| Overall efficiency | - | maker data |