The lifespan of a filter varies considerably depending on the material, application scenario, and maintenance conditions, as detailed below:
I. Air Filter
Pre-filter
1.Service life: 1-3 months(Paper frames last about 1 month, while plastic/wooden frames can last up to 6 months)
2. Replacement is required when the final resistance is twice the initial resistance.
medium efficiency filter
1.Service life: 2-5 months(Polyester fiber: 2-4 months; Glass fiber: 3-5 months)
2.It needs to be scrapped after 3 cleanings.
High-efficiency particulate air (HEPA) filter
Service life: 1-3 years(Standard cleanrooms: 1-3 years; household air purifiers: 6-12 months)
Replace when the final resistance reaches 2-3 times the initial resistance.
II. Liquid Filter
activated carbon filter
Service life: 6 months - 3 years(Municipal water treatment takes 2-3 years, industrial wastewater takes 6-12 months)
Excessive flow rate or insufficient backwashing will shorten the lifespan.
Reverse osmosis filter (RO membrane)
Service life: 1-5 years(Municipal sewage can be reused for 3-5 years, and high-salinity wastewater for 1-2 years.)
Replacement is required when the desalination rate decreases by more than 15% or the water production decreases by more than 30%.
Bag filter
The tank has a lifespan of 3-6 years, and the filter bags need to be replaced every 6-12 months.
III. Key Factors Affecting Lifespan
Environmental conditions : dust concentration, humidity, corrosiveness, etc. (e.g., the lifespan 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 : Continuously operating equipment requires more frequent filter replacements.
It is recommended to determine the pressure by differential pressure monitoring (replace when ≥0.1MPa) or regular testing (e.g., every six months for cleanrooms).
