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Practical notes from the people who size and build the systems: how to choose an element, when to pre-separate, and how to get more service life out of the cartridges you already own.

8 articles

24 Sept 2026

When a longer cartridge pays for itself

Filter area is what keeps differential pressure down. Fitting a taller element is often cheaper than a bigger fan.

10 Sept 2026Spark catchers, and why they sit in front of the filterWelding, laser cutting and grinding throw hot particles into the duct. A spark catcher is the cheapest part of the system that protects the most expensive one.

28 Aug 2026Cartridge collectors and bag filters — where each one winsBoth are pulse-cleaned fabric filters. The decision usually comes down to footprint, cleaning energy and how the dust behaves.

6 Aug 2026Sizing a dust collector for a welding shopAir volume, capture distance and duty cycle decide the size of the unit — not the number of welding bays. Here is the arithmetic we run before quoting.

18 Jun 2026KNT-SE: what the venturi end cap actually doesThe four-lug ABS end cap on the KNT-SE carries an integrated venturi. It is the reason the cartridge cleans evenly from top to bottom.

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