The material, application scenario and maintenance conditions have a great impact on the service life of filter . The details are described as follows:
I. Air cleaner
Pre-filtered
1. Shelf life: 1-3 months (Paper frames ~1 month, plastic/ wooden frames up to 6 months)
2. If the final resistance is twice the initial resistance, then a replacement is required.
Medium-efficiency filtration
1.Service life: 2-5 months(Polyester fibre: 2-4 months Glass fibre: 3-5 months)
2. Use 3 cleanings and throw away.
HEPA filter (High efficiency particle air filter)
Service life: 1-3 years (1-3 years in standard clean rooms, 6-12 months in household air cleaners)
Replace when the final resistance is 2-3 times the original resistance.
II. Liquor filtration
Activated carbon filter
Lifespan: 6 months-3 years (municipal water treatment 2-3 years, industrial wastewater 6-12 months)
Too high flow rate or no back washing will reduce the life span.
RO membrane (reverse osmosis filter)
Service life: 1-5 years (Municipal sewage can be recycled for 3-5 years, high salinity wastewater for 1-2 years.)
Replacement shall be necessary if the desalination rate decreases by more than 15% or the water production by more than 30%.
Bag filter
The tank will last for 3-6 years and the filter bags should be changed every 6-12 months.
III. Factors Critical for Longevity
Environmental conditions: dust concentration, humidity, corrosiveness, etc. (e.g., the service life of filter elements in industrial workshops is 30%-50% shorter than that in ordinary offices).
Maintenance method: Regular cleaning/backwashing can extend the service life (if the filter element is washable, it only supports 2 cleanings).
Frequency of use: Equipment that runs constantly will require more frequent filter changes.
Pressure can be monitored by differential pressure monitoring (replace when ≥0.1MPa) or periodic testing (e.g. every 6 months for cleanrooms).
