The phenomenon whereby dust is collected from the air stream and is then returned to the air stream. It occurs when dust is cleaned from the bag and then caught again by an upward moving air stream, which redeposits it on a bag.

In a dust collector with the filter elements suspended from the tubesheet, can velocity is the upward air stream speed calculated at the horizontal cross-sectional plane of the collector housing that passes through the bottom surface of the filters. 

The gas flow rate expressed in actual cubic feet per minute (ACFM) divided by the area of the filter element. For example, a 20 square foot filter element processing 2000 ACFM would have a face velocity of 100 feet per minute.

A US EPA standard that includes additional controls on particulates sized 2.5 micron and smaller.

Mechanical machine equipped with knives, which are used to cut down larger rolls to a smaller size.

Refers to the maximum amount of shrinkage or elongation that could be experienced when a fabric is exposed to operating temperatures on the upper edge of its temperature range.

To sew over a previously sewn seam or stitch to prevent the thread from unraveling.

Reversed flow through a filter medium to remove filtered solids.

A device usually consisting of a plate or series of plates which evenly distribute airflow and dust within a dust collector to protect filter bags from direct impingement of dust.

An air filtration structure utilizing fabric filter bags for the purpose of removing solid particulate from the gas stream; dust collector.