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来自一线选型与制造人员的实用笔记：怎么挑滤芯、什么时候该加预分离、如何让手上的滤筒用得更久。

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2026年9月24日

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.

2026年9月10日Spark 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.

2026年8月28日Cartridge 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.

2026年8月6日Sizing 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.

2026年6月18日KNT-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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