How to Judge if the Filter Cartridge of a Self-Cleaning Air Filter Needs Replacement?

Judge the replacement of the filter cartridge by three core dimensions: differential pressure data, physical condition and service life.

 Replace it immediately if any of the following conditions occurs, with simple and easy operation standards as follows:

Abnormal differential pressure (core criterion)

After the filter cartridge is properly backflushed or cleaned offline, the operating differential pressure of the equipment remains continuously higher than the set threshold (usually ≥1.2kPa),

 or rebounds rapidly after dropping. This indicates the filter material pores are blocked by dust and the filter cartridge fails to restore filtration performance.

Physical damage/aging (visually observable)

Visually inspect after opening the access door: replace immediately if the filter cartridge has perforated, torn or bulged filter paper, or thinned, powder-shedding filter material,

 as well as aged, cracked or fallen-off gaskets, which will directly cause dust leakage.

Abnormal dust caking/adhesion (failure of working condition adaptation)

Under high-humidity/high-viscosity dust conditions, hard dust caking forms on the filter cartridge surface and cannot be removed even after backflushing and professional cleaning, 

with persistently high filtration resistance. This means the filter material has lost dust-holding capacity.

Expired service life (routine replacement node)

Replace when reaching the preset service life based on working conditions: 1~2 years for normal low-dust conditions, 6~12 months for high-dust/high-humidity/high-viscosity conditions.

 Even if there is no obvious abnormality in differential pressure and appearance, replacement is recommended to avoid potential failure due to filter material aging.