Service life of high-efficiency filters (HEPA)
Normal use: 1 to 2 years
Harsh environment / High dust: 6 to 12 months
Critical clean areas (sterile, high requirements): recommended not to exceed 1 year
1. The actual lifespan is determined not by time, but by these 4 indicators
Satisfy any one of them, it must be replaced; it cannot be used any longer:
Final resistance reaches twice the initial resistance
(The most critical indicator, mandatory for GMP)
DOP/PAO leak test fails (leakage rate > 0.01%)
Filter paper is damaged, blackened, damp, moldy, or yellowed
Use time exceeds 2 years (regardless of pressure difference, it is recommended to force replacement)
2. Tips for extending lifespan (very practical on-site)
Primary and secondary filters should be replaced on time (generally 1–3 months)
Avoid high humidity, water leakage, and direct spray from water jets towards the air outlet
Daily cleaning only wipe the diffusers, do not wipe the high-efficiency filter paper
Regularly record the pressure difference and observe the upward trend
3. Summary (can be memorized directly)
The theoretical lifespan of high-efficiency filters is 1 to 2 years,
In practice, it is replaced when the pressure difference ≥ 2 times the initial resistance, DOP leak test fails, or it has been used for 2 years
The first three conditions will be considered as the criterion, and forced replacement is required.