FIS Series filter cartridges are manufactured using proprietary combinations of polyester and micro-fiberglass filter media to achieve the desired removal rating. The pleated filter media in the FIS Series cartridge is supported by epoxy coated wire to ensure mechanical stability. The use of synthetic and non-woven filter media results in significantly higher dirt holding capacity than similar cartridges that rely solely on cellulose filter media. As a result of their innovative design, FIS Series cartridges deliver higher flow rates at lower initial pressure drops and longer on-stream life cycles when compared to conventional cellulose filter cartridges of equal efficiency.

Electro-tin plated, spiral center cores and electroplated end caps are standard components. Special configurations are available with a rigid outer cage for increased mechanical strength.