Compressed-air calculator
Compressor flow test (load/unload)
A compressor’s actual in-service flow often differs from its datasheet: wear, fouling, intake conditions. The load/unload test measures it on site, without a flow meter, from a known volume and a stopwatch.
Enter the system volume, the pressures and the pump-up time: the calculator derives the delivered flow (isothermal compression assumption).
Flow test
Compressor flow from a load/unload test (isothermal compression in a receiver).
Result
- Total volume
- —ft³
- ΔP
- —psig
- Time
- —s
Compressor flow—SCFM
Isothermal compression: SCFM = (V · ΔP_abs · 60) / (P_std · t). P_std = 14.5 psia (1 bar abs).
Indicative estimates — validate all results before any technical decision.