AM dust filters

Doug Barton dougb at dougbarton.us
Tue Aug 12 19:22:01 UTC 2014


On 08/12/2014 11:19 AM, Jason Lixfeld wrote:
> Hi,
>
> I'm interested in knowing what sorts of material folks use to make after-market dust filters for their various devices which wouldn't normally have any.  This seems to almost be a necessity when these kinds of devices are deployed in environments that are overly dusty and dirty (it should also be implied that these environments are all in-doors and would have less than ideal airflow and climate control).
>
> A material that is too dense will hider airflow and cause an immediate increase in inlet temperature, which would exacerbate a potentially threatening temperature situation in environments where the ambient temperature is already in the mid to high twenties and above (that's 77 - 86F+ for my American friends ;)).  A material that is not dense enough won't do a very good job at filtering.
>
> Do folks just hack up HEPA filters or something?

It sort of depends on what kind of stuff you're trying to filter out.

Panty hose actually makes a reasonably good filter for larger stuff, but 
Tom's question about how often are you going to service it comes into 
play, since you need to remove the debris that it catches periodically 
in order to avoid obstructing the air flow excessively.

OTOH, you also have to have some thought towards what are the benefits 
of not having the internals of the system coated with dust, vs. slightly 
reduced air flow.

Tom's suggestion of a pressurized cabinet is a good one of course, but 
that's not possible in all situations.

hth,

Doug



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