Fully Welded Filter Bags

Allied Filter Systems Ltd. is a leading manufacturer of fully welded filter bags, which are available for applications requiring standard polypropylene or polyester felts, extended life felts or high efficiency media.

All seams are welded rather than sewn, and combined with either of our positive sealing moulded Welseal (polypropylene or polyester) welded rings, no process liquid can bypass through needleholes caused by the sewing process or around a sewn snap ring. The Welseal ring forms a hermetic seal between the filter bag and housing, eliminating any possibility of bypass around a steel ring, which is a potential source of product contaminaion. These features ensure that fully welded filter bags perform to a higher efficiency than a sewn equivalent.