Filter bags last from 1 to 5 years depending on site conditions, typically 2 to 3 years, and the replacement time is set by differential pressure, emissions and bag condition rather than a fixed interval. When several of the signs below appear together, it is time to prepare for replacement.
What Determines Filter Bag Life?
Filter bag life depends on flue gas temperature and temperature swings, acid gases and moisture, dust properties and loading, cleaning interval and pressure, and differential pressure control. Even with the same material, bags last from 1 year to as long as 5 years depending on site conditions, typically 2 to 3 years.
What Else Should Be Reviewed at Replacement?
Scope of replacement: Mixing new and aged bags can cause uneven ΔP and gas distribution across compartments, so compare partial and full replacement.
Material review: If bag life was shorter than expected, find the cause and recheck your conditions with the material selection chart.
Cages and components: Inspect cages for corrosion and deformation, and check venturis and gaskets.
Depending on site conditions, filter bags last from 1 year to as long as 5 years, typically 2 to 3 years. It is better to set the replacement time by the ΔP trend and emissions than by a fixed interval.
If only a few bags are torn, should all of them be replaced?
Replace damaged bags immediately, and decide on the rest based on residual ΔP and sample condition. If the remaining life is similar across the unit, a full changeout may be planned around the maintenance schedule.
Can a used filter bag tell me its condition?
Yes. Comparing the air permeability and tensile strength of a used bag sample with a new bag helps assess how far it has blinded and lost strength.
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Head Office
Micro-one Co., Ltd. (head office and factory)
368 Yeongok-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31026, Republic of Korea Tel: +82-41-587-6911Fax: +82-41-587-6922Email: info@micro-one.kr
Dangjin Plant 2
1307 Tongjeong-ri, Seongmun-myeon, Dangjin-si, Chungcheongnam-do, Korea
Seoul Office
165 Gasan Digital 1-ro, Geumcheon-gu, Seoul (371-6, Gasan-dong)
