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Baghouse Filter Area Calculator

Work out baghouse filter area instantly with clear inputs, formula shown and shareable results.

About Baghouse Filter Area Calculator

Filter area is gas flow per minute divided by the air-to-cloth ratio, which is the filtration velocity. Pulse-jet baghouses run 1.0-1.5 m3/m2/min, reverse-air 0.5-0.9 and shaker units 0.5-0.7. Exceeding the design ratio drives dust into the fabric, raising pressure drop and shortening bag life.

Formulas

Filter area

Area (m2) = gas flow (m3/min) / air to cloth ratio

Bag count

Bags = ceil(area / (pi x bag diameter x bag length))

Worked example

With the default values below, Baghouse Filter Area Calculator returns Bags Required of 369. Change any input above and every figure here is recalculated in your browser.

Inputs used

Gas Flowminimum 0 m3/hour
50,000 m3/hour
Air To Cloth Ratiominimum 0 m3/m2/min
1.2 m3/m2/min
Bag Diameterminimum 0 mm
150 mm
Bag Lengthminimum 0 m
4 m

Results

Bags Required
369
Filter Area Required
694.44
Filter Area Per Bag
1.8850
Actual Air To Cloth Ratio
1.1981

Step by step

  1. 1Values used
  2. 2Filter area
  3. 3Bag count
  4. 4Bags Required= 369
  5. 5Filter Area Required= 694.44
  6. 6Filter Area Per Bag= 1.8850
  7. 7Actual Air To Cloth Ratio= 1.1981

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Particulate abatement performance is a permit condition. Filter design and bag selection must account for gas temperature, chemistry and moisture to avoid failure.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Particulate abatement performance is a permit condition. Filter design and bag selection must account for gas temperature, chemistry and moisture to avoid failure.

Frequently Asked Questions

What happens if the air-to-cloth ratio is too high?

Higher pressure drop, dust penetration into the fabric, bag abrasion and blinding, and reduced collection efficiency. Bag life can fall from years to months.

Should compartments be allowed for offline cleaning?

Yes. Sizing must consider the ratio with one compartment isolated for maintenance, otherwise the remaining cloth is overloaded whenever a compartment is taken offline.

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Baghouse Filter Area Calculator – Calculate Bags Required