What are Bag Filters?
A bag filter, is a form of air filtration media used within manufacturing units. The purpose bag filters, as with any filter, is to ensure the removal of impurities from the overall solution; in this instance ensuring the air filtered is purified from oils, dust and dirt contamination.
Think of a filter bag as a ‘sieve’ that is letting air pass through, and stopping any other particles transferring through the conveyor system.
To ensure that your bag house dust collection units are running at maximum efficiency, pleated bag filters are used due to their long-lifespan and high filtration surface area.
The Difference Between Pleated Bag Filters and Standard Bag Filters
Between both pleated bag filters and standard bag filters there are differences in usage, material and performance.
Pleated bag filters are up-to three times larger in cloth area, which allows the bag house to collect more contaminant, but also negates the need to invest in a larger bag house for the filter bag.
You will also find that pleated bag filters do not use a filter cage due to their one-piece design.
Pleated filters in comparison to standard filter bags also use caps at the bottom to prevent leakage.
Furthermore, pleated bag filters are used at ‘surface’ level, whereas standard bag filters are used as a depth filter solution.
The difference here is that depth filters capture any contaminant throughout the whole medium of the filter media, and are made using different materials to a bag filter (surface filter).
Understanding Air Filtration in manufacturing units
In dust collection systems within industries such as; cement, limestone etc. all manufacturing units have dust collection/extraction systems where pleated or standard bag filters are installed.
All of the dust (smaller particles of cement, dust and limestone) that are generated throughout the manufacturing process are sucked into the bag house and the filters arrest those particles so they are not thrown in the atmosphere.
This process serves two purposes:
How Bag Filters are Made
Choosing the Media
Pleating the Bag Media
Producing the Filter Core
As the filter core is produced, the inner and outer metal core of the filter is manufactured in using a CNC machine for precision control.
Bonding the Filter Media to the Casing
The Advantages of Using Pleated Filter Bags Over Standard Filter Bags
Pleated filter bags offer more filtration than traditional filter bags. They have a larger filtration surface area, and filtration capacity.
Additionally, pleated bag filters have a longer lifespan; two-to-three times the amount of standard bag filters due to the treatment of the filter media.