Hydraulic, Pneumatic & Fluid Power Systems worked example
Pressure Drop with baseline line pressure at pump outlet of 250 psi: a worked example in hydraulic, pneumatic & fluid power systems
This scenario runs the pressure drop calculation on the strong side: baseline line pressure at pump outlet of 250 psi, with every other input held at its documented default. Use it when pressure drop in hydraulic, pneumatic and fluid power systems is being sized against an asset rating.
The inputs for this scenario
- Baseline line pressure at pump outlet: 250 psi (raised for this scenario; the documented default is 100)
- Fitting and valve restriction factor: 1.2 x (unchanged)
- Duty hours per shift: 8 hr (unchanged)
Working through the calculation
- Applying the documented formula (Pressure Drop load = input load × load factor) to the inputs above produces each figure below.
- At this operating point the engine returns 300 psi for total load, the number this scenario is built around.
- At this operating point the engine returns 37.5 psi / hr for hourly equivalent.
- At this operating point the engine returns 250 psi for input load.
- At this operating point the engine returns 1.2 x for load factor.
How this compares with the baseline
- Against the tool's baseline example, where baseline line pressure at pump outlet sits at 100 psi and the headline result is 120 psi, this scenario comes in 150% above the baseline at 300 psi.
- Use it when commissioning a circuit or trending a filter/hose as it ages, to quantify how much a restriction is costing you in pressure. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.
Results at a glance
- Total load: 300 psi (headline result)
- Hourly equivalent: 37.5 psi / hr
- Input load: 250 psi
- Load factor: 1.2 x
Run it with your numbers
- Every input above is editable in the live Pressure Drop calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.