7.5 HP Compressor Receiver Tank

Size a receiver tank and pump-up time for a 7.5 HP compressor at a 100 to 125 PSI pressure band.

7.5 HP compressor receiver sizing

7.5 HP compressor receiver sizing is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Pump-up time and duty cycle

Pump-up time and duty cycle is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Usable stored air

Usable stored air is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Engineering summary

Governing parameters and computed results for 7.5 HP Compressor Receiver Tank.

Governing parameters and computed results for this calculation
Parameter Value
Compressor Scfm 27
Tank Gallons 80

Frequently asked questions

How do I size a receiver tank for a compressor?
Size the receiver so the compressor pumps up in one to five minutes: V = T·(C−D)·Pa / ΔP, where C is compressor output, D is shop demand, Pa is atmospheric pressure and ΔP is the cut-in to cut-out band.
What duty cycle should a shop compressor run at?
Keep the duty cycle at or below 70% so the compressor has recovery time between cycles. Duty cycle is demand divided by compressor output; a value above 70% means the compressor is undersized for the tool load.
Why does tool SCFM demand rise with supply pressure?
Most air tools consume more air at higher supply pressure because the motor runs faster. A 1 in impact wrench draws about 12 SCFM at 90 PSI but 15.6 SCFM at 125 PSI, so size the compressor for the pressure you actually run.