Extended Life Filter Bags
Extended Life filter bags are available in polypropylene or polyester needlefelt ranging from 0.5-100 microns, and can have a lifetime of upto 5 times that of the equivalent standard filter bag.
Increased thickness of the filter media compared to that of the equivalent standard felt filter bag enables an increased retention of particles. In addition, the extended life filter media has a graded density structure i.e. progressively smaller particles are captured as the fluid follows a tortuous path through the media, stopping the filter bag from blinding prematurely. The result is a filter media with a higher dirt holding capacity, leading to increased filter bag lifetime.
Within the Extended Life series, Allied Filter Systems Ltd is uniquely able to offer a 0.5 micron polyester filter bag. The filter media has a special construction using a blend of micro denier and fine denier fibres, giving the finest filtration results of any needlefelt product available on the market.
Extended Life Filter Bag Brochure
As standard, the Extended Life filter bag is fully welded, maximising filtration efficiency by eliminating fluid bypass through needle holes or around traditional metal rings. The external surface has a special highly glazed finish, eliminating fibre migration into the filtrate.
Other benefits include:
- More efficient filtration process
- Minimisation of equipment downtime.
- Minimisation of engineer exposure to process liquids.
- Fewer bags to change and dispose of compared with standard felt filter bags – more environmentally friendly
- Excellent at removing deformable particles such as gels
- Conforms to EC food contact directives
Standard Filter Bags
Allied Filter Systems Ltd manufactures high quality liquid filter bags to fit standard size filter vessels, as well as custom designed products where requested. The constituent materials have been chosen for their purity, consistent high quality and repeatable performance. Filter bags are available in traditional stitched form or with a fully welded construction, and are fitted with a comprehensive choice of rings.
Sewn Needlefelt Filter Bags
Needlefelts are a versatile and cost effective media providing a high solid holding capacity for both non-deformable and deformable, gelatinous particles. By means of a depth filtration mechanism, particles penetrate and are captured throughout the depth of the filter media.
Fully Welded Filter Bags
All seams are welded rather than sewn, and combined with our positive sealing moulded Welseal (polypropylene or polyester) welded ring, no process liquid can bypass through needleholes caused by the sewing process or around a traditional metal ring. The Welseal ring forms a 360o hermetic seal between the filter bag and housing, ensuring that fully welded filter bags perform to a higher efficiency than a sewn equivalent.