Top coating on fabric to assist in the filtering operation.
A metal device used to fold moving fabric to a given shape automatically. Also prepositions the fabric.
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 device for moving air and dust through the system. If the fan is on the dusty side of the baghouse pushing the dusty air through the baghouse, it is called a positive system. If the fan is on the clean airside of the baghouse pulling the dusty air into the baghouse, it is called a negative system. (80% of all baghouses are negative systems.)
Food and Drug Administration.
Vertical seam in a filter bag, typically a nonwoven, which requires an overlap of the material.
A fabric produced by using barbed needles to interlock carded fibers and, if applicable, a woven base fabric.
Type and/or grade of fibers used in media.
FIELD (IN DEPTH)
An arrangement of bus sections perpendicular to gas flow energized by one or more high voltage power supplies.
An individual yarn, which interlaces with the warp yarn at right angles in a woven fabric. Also known as a pick or filling yarn.
Any material that assists in the separation of solids from liquids. Usually used on difficult filter applications.
Solids deposited on the filter media.
The ratio of differential pressure across the filters to velocity through the filters.
A measurement of how well a filter retians particles. Usually expressed as a percentage of retention of particles of a specific size by a filter.
The permeable barrier employed in the filtration process; the fabric on which the filter cake is built.
The end product of the filtration process; i.e., liquid exiting the filtrate outlet.
The volume of liquid that passes through a given area in a specified time. Usually expressed as gallons per square foot per minute (or hour).
A loop sewn into the bag to assist in the installation of the bag.
Physical (mechanical) or chemical fabric treatment to impart a desired surface property.
Fabrics treated with special chemical agents or finished to make them retardant or resistant to burning. Many fabrics achieve this property by using fibers that have this property built directly into the polymer.
The distance across a bag or slit roll measured perpendicular to long side.
The movement of filter media primarily during the cleaning cycles can lead to long term damage due to fiber-to-fiber abrasion. Also, new filter bags can be flexed (bent) by rough treatment during shipping and installation.
The speed at which a liquid flows and is measured in gallons or liters per minute. Flow rate of a liquid can be affected by the liquids' viscosity, differential pressure, temperature, and type of filter used.
Dust from a furnace. The term distinguishes the ash that flies from that which drops to the bottom.
Emissions from a process or control that occur at points other than stacks or vents.
Small solid particles formed by the condensation of vapors of solid materials.