How often should the screen of a brush-type self-cleaning filter be replaced?

How often should the screen of a brush-type self-cleaning filter be replaced?

Replacement intervals for the screen of a brush-type self-cleaning filter:

Normal conditions (industrial circulating water/clean water): 1–3 years for stainless steel screens; 6–12 months for standard metal/composite screens.

Moderate contamination (sediment/suspended solids): Inspect every 6–8 months, replace around 1 year.

Heavy contamination (oily/viscous impurities): Inspect every 3–4 months, replace at 6 months.

Severe conditions (hard particles/high temperature/corrosion): Inspect every 3 months, replace every 3–6 months.

Replacement criteria:

Pressure difference frequently exceeds limit (e.g., ＞0.08 MPa) with no improvement after cleaning.

Screen damage, deformation, permanent plugging, or material aging.

Deteriorated effluent quality or abnormal clogging of downstream equipment.