WA Series Filter Bags
Allied Filter Systems has developed the water absorbent (WA) series for processes requiring water removal from hydrocarbons.
Available in both size 1 and 2 with a choice of either plastic or metallic rings, the WA series filter bag can reduce water content from several thousand ppm to acceptable levels in line with the needs of your process. As the filter media absorbs water by hydrogen bonding, the filter does not release water under pressure.
The standard construction of the filter bag has an inner polypropylene support layer, a super absorbent fibre water absorbent media central layer, followed by an outer melt blown polypropylene cover.
As an option, the WA series can be provided with an additional felt layer to provide enhanced particle removal efficiency and protection from premature blocking of the WA media.
Capacity based on size 2 filter bag:
Absorbency volume (DM water)
Absorbency volume (0.9% saline)
Chemical Compatability Guide
|Media / Collar Type||Acids||Alkali||Solvents||Oxidants||Recommend Maximum Operating Temperature (*C)|
|Bag Size||Diameter (inches/mm)||Length (inches/mm)||Surface Area (m2)||Volume (l)||Maximum Flow Rate (m3/hr)*|
*Flow rate depends on factors such as filter media type, micron rating, and fluid being filtered. All dimensions are nominal.
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.