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Bag Filters & Cartridges

Bag Filters & Cartridges
Product Code : SWE-Bag Filter
Brand Name : SWE
Product Description

Cartridge filter - Bag filter

A Bag-filter works by the principle of micro-filtration. The liquid is purified in bags by passing small permeable pores. Bag-filters can be used for large amounts of water.

The sizes of these pores are between the 1-200 micron

The capacity depends on the surface area from the bags. Bigger systems can clean up to more than 500 m3 /h (multi bag-filters)

  • There are special bags for various chemicals

  • The choice of cartridge filter depends on the application. Cartridge filters are preferable for systems with contamination's lower than 100 ppm, that is to say with contamination levels lower than 0.01% in weight.

Cartridge filter can be surface or depth-type filter: depth-type filters capture particles and contaminant through the total thickness of the medium, while in surface filters (that are usually made of thin materials like papers, woven wire, cloths) particles are blocked on the surface of the filter.

Surface filters are best if you are filtering sediment of similar-sized particles. If all particles are i.e. five micron, a pleated 5-micron filter works best because it has more surface area than other filters. Compared with pleated surface filters, depth filters have a limited surface area, but they have the advantage of depth.

It can be generally stated that if the size of filter surface is increased, higher flows are possible, the filter last longer, and the dirt holding capacity increases. Cartridge filters are normally designed disposable: this means that they have to be replaced when the filter is clogged.

Bag filters are in general frequently used for dust removal in industrial applications. The flow can be from the outside to the inside of the filter (that means, the separation of particles happens on the external surface of the filter) or the other way around, depending on the application. The particles are normally captured on the internal surface of the bag filter.

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