Filter element of the boat frame high-efficiency filtration unit – Specific service life in high-humidity environments (by humidity range + operating conditions)
Conventional dry and clean environment (RH 40% – 60%, with intact pre-filter) Standard lifespan: 8 – 12 months
The unified lifespan in high-humidity environments is 50% – 60% of the regular working conditions, divided into three levels with specific durations:
1. Mild high-humidity: RH 60% – 70% (pharmaceutical wet workshop, ordinary clean room in the south, intermittent water vapor production)
Front-end primary + medium-efficiency regular replacement, with basic dehumidification
Lifespan: 5 – 6 months
Continuous 24-hour operation, pre-filter maintenance generally
Lifespan: 4 – 5 months
Feature: Pressure difference rises gradually, rarely condensation, only static electricity attenuation, slight accumulation of dust and hardening.
2. Moderate high-humidity: RH 70% – 85% (food cooking area, water treatment clean room, cold storage clean area)
Equipped with dehumidification unit, pre-filter inspected and replaced monthly
Lifespan: About 4 months
No strong dehumidification, large temperature difference in the morning and evening leads to condensation
Lifespan: 3 – 4 months
Feature: Dust encounters water to form lumps, slow absorption of moisture by sealing, pressure difference rises significantly within 1 – 2 months, occasional slight mold spots.
3. Severe high-humidity: RH > 85%, frequent condensation, continuous water vapor (soaking workshop, high-temperature cooking clean area, without dehumidification)
Special high-humidity glass fiber filter element, encrypted front-end filtration
Lifespan: 3 months
Ordinary standard glass fiber filter element, without dehumidification, 24-hour continuous operation
Lifespan: 2 – 3 months
Feature: Filter material expands upon water absorption, sealing degrades, mold rapidly proliferates, often reaching twice the initial resistance within less than 3 months, leakage in large areas is frequently detected during leak testing.
Four supplementary correction conditions (directly change lifespan)
Front-end filtration failure (primary / medium-efficiency not replaced for a long time): The above cycle is shortened by 30%
Daily intermittent operation for 8 hours: Lifespan is extended by 20% under the same humidity conditions
Frequent space fumigation and disinfection (hydrogen peroxide / formaldehyde): Water vapor accumulation causes corrosion, the cycle is shortened by 1 month
Intuitive comparison table (convenient for writing into equipment SOP)
| Environmental humidity | Standard frame high-efficiency filter cartridge lifespan | The main cause of failure |
| RH < 60% (dry standard) | 8 ~ 12 months | Simple dust accumulation and blockage |
| RH 60% – 70% | 5 ~ 6 months | Electrostatic attenuation, mild accumulation of dust and hardening of the board |
| RH 70% – 85% | 3 ~ 4 months | Dust clumps and the sealant has become soft due to moisture absorption. |
| RH > 85% (continuous condensation) | 2 ~ 3 months | Filter material expands, gets moldy, and the seal cracks, allowing air leakage. |
Important Reminder
The time provided is only for planning purposes. In high-humidity environments, a mandatory replacement must occur when the pressure difference reaches twice the initial resistance. If mold appears, water stains on the filter material, or PAO leak detection fails, regardless of how long it has been used, it must be replaced immediately.
