I will provide you with the most core, standard, and directly applicable version that can be incorporated into the SOP / training materials – the factors that truly affect the filtration efficiency of the high-efficiency filter, only presenting the key points and omitting the unnecessary details.
1. 7 key factors affecting filtration efficiency
1. The quality of the filter itself (the most fundamental)
Insufficient filter material grade (H13/H14 are truly efficient)
Filter paper has pinholes, damage, or flaws
Poor sealing glue and frame craftsmanship
→ Directly leads to non-compliance with filtration efficiency standards.
2. Whether the installation seal is intact (extremely influential)
Leakage of the frame and sealing strip
Improper installation, with gaps
Inadequate filling of the liquid tank glue and bubbles
→ Air passes directly through without filtration, resulting in the failure of the filtration effect.
3. Whether the front-end filtration is normal (primary and secondary efficiency)
Long-term failure to replace, blockage, or damage of primary and secondary efficiency filters
Large particles of dust directly reach the high-efficiency filter
→ The high-efficiency filter quickly gets clogged, the resistance rises, the air volume decreases, and the filtration effect deteriorates.
4. Usage time and blockage degree
Excessive use
Resistance reaching more than twice the initial resistance
Decreased air volume, uneven airflow
→ The filtration effect significantly decreases, and the cleanliness does not meet the standards.
5. Filter paper damage, moisture absorption, mold growth
Infiltration, high humidity, condensation
Mold growth, softening, or damage of the filter paper
Impact, pressing, or wiping
→ The filtration structure is damaged, and the efficiency directly fails.
6. Airflow organization and air volume
Insufficient or excessive air volume
Airflow short circuit, vortex
Inappropriate installation of the air outlet
→ The actual filtration effect does not meet the design standards.
7. Maintenance and operation norms
Rough disassembly
Cleaning the filter paper
Reversing air blowing
Secondary pollution of dust during cleaning
→ Cause hidden leaks and efficiency decline.