Can this size the dust collector fan?

No. Fan and ventilation design needs hood, enclosure, duct velocity, pressure loss, air cleaner and stack data plus the applicable hazard analysis.

Why show uncaptured mass?

It closes the mass balance and highlights particulate not represented as collected. It is a check figure, not a compliance threshold or emission limit.

Does OSHA specify these percentages?

No. OSHA governs ventilation and safe operation; the operating percentages must come from equipment data and site measurements for your process.

What if the dust may be combustible or toxic?

Stop using a planning result as a design decision and obtain a qualified hazard and exposure assessment before changing the system.

Abrasive Blasting, Shot Peening & Surface Prep calculator

Abrasive Blast Dust Collector Mass-Loading Calculator

Estimate collected dust mass and hopper service frequency from media breakdown plus coating and scale removed. Enter feed rate, breakdown, removed material, capture efficiency, loaded hours and hopper capacity.

What this calculator does

Captured dust mass and hopper service frequency from media breakdown and removed coating or scale.

Formula used

Media fines (lb) = feed (lb/min) × 60 × hours × media breakdown % ÷ 100
Removed material (lb) = removed coating and scale (lb/hr) × hours
Captured dust (lb) = (media fines + removed material) × capture efficiency % ÷ 100
Hopper change-outs = ceiling(captured dust ÷ hopper service capacity)

Inputs explained

Media Feed Rate: Abrasive mass sent to the nozzle while loaded.
Media Breakdown to Fines: Share of circulated media becoming dust-sized fines.
Coating and Scale Removed: Combined coating, rust and scale mass removed per loaded hour.
Mass Capture Efficiency: Whole-system fraction of generated particulate captured.
Loaded Operating Interval: Nozzle-loaded hours represented by the estimate.
Hopper Service Capacity: Collected dust mass at the planned service fill.

How to use the result

Best suited to hopper service planning, waste-container sizing, media-breakdown comparison.
Not a ventilation fan, duct or hood design calculation. Not a combustible-dust hazard or exposure assessment.

Common questions

Can this size the dust collector fan? No. Fan and ventilation design needs hood, enclosure, duct velocity, pressure loss, air cleaner and stack data plus the applicable hazard analysis.
Why show uncaptured mass? It closes the mass balance and highlights particulate not represented as collected. It is a check figure, not a compliance threshold or emission limit.
Does OSHA specify these percentages? No. OSHA governs ventilation and safe operation; the operating percentages must come from equipment data and site measurements for your process.
What if the dust may be combustible or toxic? Stop using a planning result as a design decision and obtain a qualified hazard and exposure assessment before changing the system.

Last reviewed 2026-10-01.