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
