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The Stockpile · Pile 02 — The Parts

Air filters

Bags, cartridges and the pulse parts around them — for most major collectors.

3 min readUpdated Aug 2026

What’s on the shelf

Replacement filtration for the collectors that keep your plant breathing: filter bags and cages, pleated cartridges, and the pulse-system parts around them — solenoids and repair kits, diaphragm valves, timers, gauges and clamps. Stocked for Camfil Farr, Donaldson Torit, Imperial Systems, Pneumafil, RoboVent, UAS and more.

Ordering filters that actually fit

  • Match the collector, not the catalog. Make, model and bag count off the nameplate beat guessing from dimensions.
  • Media matters. Temperature, moisture and dust chemistry pick the media — polyester, aramid, PTFE-membrane and more. Tell us the application, not just the size.
  • Cages wear out too. Bent or corroded cages kill new bags early; inspect at every change-out.
  • Change-out labor available. Supervised bag change-outs are a core service — parts and labor from one call.

Bags dying early?

Bags that fail in months signal a design or operating problem — air-to-cloth pushed too high, wet pulse air, or abrasive inlet velocity. Diagnose before the next change-out; the diagnosis usually pays for itself in bag life.

Media selection at a glance

MediaContinuous temp (approx.)Best for
PolyesterTo ~275°FGeneral dry dust — the default workhorse
Aramid (Nomex®-type)To ~400°FHot processes — dryers, kilns, asphalt
PTFE membrane (on any base)Per base mediaFine, sticky or agglomerating dust; best cake release and emissions
P84®To ~500°FHigh temperature plus fine dust capture
FiberglassTo ~500°FVery hot gas streams — boilers, carbon black
Spunbond polyester (cartridge)To ~200°FCartridge collectors; washable variants for some dusts

Finishes matter too: singed, glazed, oleophobic/hydrophobic and antistatic treatments are chosen from the dust’s behavior. Send the collector model, the dust and the temperature — media selection is a two-minute conversation that prevents a premature change-out.

How bags fail (and what it tells you)

  • Holes low on the bag, inlet side: abrasion from inlet velocity — consider inlet baffling.
  • Blinded, heavy bags: moisture or oil — check compressed air quality and dew point in the housing.
  • Cage-pattern wear stripes: worn or bent cages flexing the fabric — replace cages, not just bags.
  • Brittle, discolored fabric: temperature excursion or chemical attack — media upgrade time.
  • One row leaking: failed pulse valve or seat gasket on that row — fix the valve, then the bags.

Change-out best practices

  • Trend DP before and after — a new set should settle into a stable break-in DP.
  • Inspect every cage; bent or corroded cages kill new bags early.
  • Seat snapbands fully — a half-seated band is a guaranteed leak path.
  • Dispose properly — the dust on the bags is the same dust your permit cares about. Our change-out service handles it.

Ordering checklist

  • Collector make and model (nameplate photo is perfect)
  • Bag dimensions — diameter × length — and top/bottom style (snapband, raw edge, ring)
  • Media and finish — or the dust + temperature and we’ll spec it
  • Quantity and cages — count the rows, and order cages if there is any wear doubt

Frequently asked questions

How do I know which media to order?

Send the collector make/model, the dust, and the operating temperature. Media selection is application engineering — a two-minute conversation prevents a premature failure.

Do you stock MERV-rated filtration?

Our ventilation systems carry MERV 15 efficiency — 99.9% on 0.3 to 0.5 micron, best in the industry for this equipment class. Collector media is specified per application.

Can you dispose of used filters?

Change-out service includes proper handling and disposal — important when the dust itself is regulated.

The ACT Group

Applied Conveyor Technology — bulk material handling experts. Dust control, conveyor services, silo cleaning, parts, and engineering.

© 2026 The ACT Group (Applied Conveyor Technology). All rights reserved.