Baghouse Dust Collector Air-to-Cloth Calculator
Calculate pulse-jet baghouse filter cloth area, Air-to-Cloth (A/C) ratio, total bag count, interstitial can velocity, and cleaning air demand.
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Frequently Asked Questions
What is Air-to-Cloth (A/C) ratio and why is it so critical?
The Air-to-Cloth ratio (filtration velocity in ft/min) represents volumetric airflow divided by active filter cloth surface area: A/C = ACFM / sq ft. Operating with too high an A/C ratio packs dust deep into the woven felt matrix, leading to fabric blinding, skyrocketing differential pressure (ΔP), and drastically shortened bag life.
What is "can velocity" and how does it cause baghouse failure?
Can velocity is the upward interstitial gas velocity flowing between and around the vertical filter bags inside the housing. If can velocity exceeds 250 to 300 ft/min, dust blasted off the bags during a pulse cannot settle downward into the hopper; it is immediately re-entrained back onto adjacent bags, causing continuous high pressure drops.
What are typical bag fabric materials and temperature ratings?
Standard polyester felt is rated to 275°F (135°C). For higher temperatures, fiberglass is rated to 500°F (260°C), Nomex/Aramid to 400°F (204°C), Ryton/PPS to 375°F (190°C with acid resistance), and PTFE (Teflon) to 500°F with universal chemical resistance.