Bag filters, also known as "socks," are cost-effective air pollution control bags used in manufacturing plants to filter particulate matter and dust from incoming air streams.
Bag filters use a fabric filtration system consisting of bags with special filter media to capture, collect, and separate dust and particles of varying sizes from the air. Depending on the manufacturer and type, a baghouse dust collection system may have anywhere from 6 to hundreds of baghouse filter bags.
Types of Baghouse Filter Media
Woven
Woven filters are standard for reverse air and mechanical vibration baghouses. The filters have a tightly woven fiber pattern with tiny gaps between the fibers. The smaller the openings, the smaller the particles the filter handles.
Nonwoven
Nonwoven filter media is best suited for removing very fine contaminants, aerosols, and dust. The filters are bonded together by a mechanical or chemical process.
Pleated filter bags
Pleated filter bags are efficient because they have a greater surface area and require a lower air-to-fabric ratio. They have lots of space in the deep pockets of the woven fabric to hold dust.
Felt Filter Bags Felt filters capture particles by impact (they act as a target for particles) and intercept them. They are arranged irregularly from each other to provide more target space to capture any form of matter that tries to pass through them.
