Importance

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Abstract

A dust collector includes a collector housing and a filter arrangement. The collector housing includes a hopper and has walls defining an unfiltered air plenum, a filter region, a filtered air plenum, an air inlet, and an air outlet. The air inlet has a first dimension across a widest portion of the air inlet. A filter arrangement is operably positioned in the filter region of the collector housing. Unfiltered air flows through the air inlet, into the unfiltered air plenum, through the filter arrangement, into the filtered air plenum and out through the air outlet. The hopper is located under the filter region in a position to catch particulate matter that falls by gravity from the filter arrangement and the unfiltered air plenum. The unfiltered air plenum includes a pre-separation region that is spaced both laterally and axially relative to the filter region. The pre-separation region is spaced laterally relative to the filter region at least 0.5 times the first dimension of the air inlet. The air inlet is spaced axially relative to a lowest portion of the filter region in a range of not greater than one time the first dimension of the air inlet. Methods of filtration include directing air to be filtered through an air inlet of a dust collector housing and into an unfiltered air plenum; directing at least some of the air into a pre-separation region of the housing; turning at least some of the air 180 degrees within the pre-separation region; directing the air through a filter arrangement and into a filtered air plenum; and directing filtered air out of the housing and through an air outlet.

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