Bag Filters

The dust-laden air (raw gas) flows through the inlet opening into the filter housing where it is strongly decelerated by the volume increase, causing coarser dust particles to be pre-separated. The raw gas flows through the filter bags from outside to inside, with dust particles being separated on the bag surface.

The cleaned air (clean gas) flows out of the separator through the clean gas outlet and is either returned to the workspace (recirculated air) or discharged outdoors (exhaust air), depending on the exhaust air quality.

A switchover device in the exhaust air line also enables alternating operation. The compressed air pulse cleaning is controlled by differential pressure or time via a programmable controller. The dust deposited on the filter elements is thus continuously cleaned off during operation and falls into the dust collection hopper. Here, the dust is disposed of either automatically or manually via a discharge device.

For 24-hour operation or large dust quantities, continuous disposal is carried out via a rotary valve or screw conveyor into the disposal container or big bags.

The SF series bag filters from WALTER can be equipped with appropriate safety technology for explosive or flammable dusts. Regulations such as ATEX, VDI etc. are of course taken into account.

The bag filters are available from 3,000 m³/h up to 60,000 m³/h. For higher air capacities, the separators are installed in parallel or manufactured according to customer specifications.