Why is circulated media higher than fresh media?

Reusable abrasive passes through the nozzle many times. Fresh demand is only the unrecovered or rejected fraction plus the initial system charge, so the circulated figure is not the purchase quantity.

What do I enter for once-through media?

Set recovery and separator yield to zero. The model then treats all circulated media as fresh make-up, which is the correct basis when spent abrasive is discarded after one pass.

Can this replace a trial blast?

No. Time a trial on the actual surface, media and nozzle to establish feed rate and accepted coverage. The estimate only multiplies rates you measured or quoted.

Does moisture loss count in separator yield?

Yes. Include every recovered pound that cannot return to production, including wet clumps, fines and contaminated material rejected at the separator.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Blast Media Consumption Calculator

Estimate the fresh abrasive a job needs after reclaim and separator losses. Enter area, accepted coverage rate, feed rate, recovery, separator yield and the initial charge; the model separates circulated from purchased media.

What this calculator does

Fresh abrasive a blast job needs after reclaim losses, separator rejection and the initial system charge.

Formula used

Active blast time (hr) = blast area (ft²) ÷ effective coverage rate (ft²/hr)
Media circulated (lb) = media feed (lb/min) × 60 × active blast time (hr)
Reusable media (lb) = circulated × recovery % ÷ 100 × separator yield % ÷ 100
Fresh media (lb) = initial charge + max(circulated − reusable, 0)

Inputs explained

Blast Area: Net surface area to be blasted, from drawings or takeoff.
Effective Coverage Rate: Accepted area per active nozzle-hour from comparable work.
Media Feed Rate: Measured abrasive flow while the nozzle is live.
Recovery Efficiency: Share of circulated media returned to the reclaim system.
Separator Usable Yield: Share of recovered media accepted as reusable after separation.
Initial System Charge: Fresh media to fill the pot, hopper and reclaim loop.

How to use the result

Best suited to bid material takeoff, blast room inventory planning, reclaim upgrade business case.
Does not predict profile, cleanliness or coating adhesion. Confirm media compatibility and allowable recycle count with the supplier.

Common questions

Why is circulated media higher than fresh media? Reusable abrasive passes through the nozzle many times. Fresh demand is only the unrecovered or rejected fraction plus the initial system charge, so the circulated figure is not the purchase quantity.
What do I enter for once-through media? Set recovery and separator yield to zero. The model then treats all circulated media as fresh make-up, which is the correct basis when spent abrasive is discarded after one pass.
Can this replace a trial blast? No. Time a trial on the actual surface, media and nozzle to establish feed rate and accepted coverage. The estimate only multiplies rates you measured or quoted.
Does moisture loss count in separator yield? Yes. Include every recovered pound that cannot return to production, including wet clumps, fines and contaminated material rejected at the separator.

Last reviewed 2026-10-01.