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Sand Filters


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Yes. Maybe not those specific types, however.In the U.S., a company I've worked with uses filters similar to those (specifically: http://www.pall.com/main/aerospace-defense-marine/product.page?id=53117) in place of the PZUs. The PZUs are roughly 70% effective, while the larger filters are quite a bit more effective than that (though I don't have actual numbers).


EDIT: I'm not personally a fan because it means I can't use the hatch to get on top of the aircraft for routine maintenance.

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