The English name for an automatic roll filter is Automatic Roll Filter or Automatic Winding Filter.
How it works
A roll of filter media slowly advances when pressure differential across it rises, presenting fresh media automatically and discarding the dirty section into a take-up roll. This keeps pressure drop – and fan energy – nearly constant without manual change-outs.
Where it is used
- Spray booths and paint lines
- Cement, mining and bulk-material plants
- Power plants and turbine intake
- Commercial AHUs in dusty urban air
Related terms
- Automatic Roll Filter (most common)
- Automatic Winding Filter (alternative)
- Variable-air-volume roll filter
Frequently Asked Questions
What is another name for an automatic roll filter?
Automatic Winding Filter; both describe the self-advancing media roll that renews the filter surface automatically.
How does it clean itself?
It advances the media roll when pressure drop rises, exposing clean media and winding up the dirty section.
Where are roll filters used?
High-dust sites such as spray booths, cement and mining plants, power intake, and dusty commercial AHUs.
Selection criteria
Specify the media grade by dust loading and filter class (G4 to F9), and size the roll by face velocity – typically 1.5 to 2.5 m/s – so pressure drop stays in the designed band. A differential-pressure switch triggers the advance automatically, so the operator sets the change threshold rather than a fixed schedule.
Maintenance
Inspect the take-up roll capacity for the duty cycle, and keep a spare media roll on hand. In very greasy air, pair the roll filter with a pre-filter or a heat-recovery stage so the exchanger core stays clean.