Series PF

Penguin String Wound Cartridge Filters

Filter Pumps can tailor your filtration system to your specific needs and economics, whether it be for single pass or recirculation filtration. Our wound cartridges filters reject particles from as low as 0.5 microns to 150 microns and are available in standard lengths ranging from 3″ to 40″ or longer on special orders. We offer a standard nominal 1″ inside diameter and optional inside diameters of 7/8″, 1 3/8″, and 30mm. Our standard outside diameter is 2 1/2″ with optional outside diameters ranging from 2″ to 4 1/2″.

Penguin offers a wide selection of media such as FDA and utility-grade polypropylene, natural cotton, bleached cotton, and rayon. Along with polyester, nylon, modacrylic, and fibrillated. FPI offers your choice of core materials like polypropylene, tin-plated steel, 304 stainless steel, and 316 stainless steel so that you can select the appropriate combination for your filtration requirements.

Standard Polypropylene

Recommended for concentrated acids and alkalies, strong oxidizing agents, corrosive fluids, and gases. FDA and Non-FDA available — Consult factory. Easily incinerated to traces of ash. Excellent micro-organism  resistance. For use to 200˚F.

Bleached Cotton

Bleached to meet FDA standards for distilled water, beverages, vegetable oils, petroleum, fatty acids, and alcohols. For use to 300˚F. Poor micro-organism resistance.

Fibrillated Polypropylene “Electronic Grade”

Non-migrating slit film polypropylene-free of extractables recommended for use in ultra-pure liquids, electronics, and plating where non-leaching is critical. No extractables or sizing agents present. Chemical resistance equal to standard polypropylene. Low moisture adsorption and outstanding abrasion resistance. Lowest static propensity of any man-made fiber. High dry or wet strength.

Natural Cotton

For oils, water, paints, organic solvents, alcohols, and petroleum. Non-FDA applications. For use to 300˚F.


For strong acids, concentrated alkalies, and oxidizing agents. For use to 200˚F. Not recommended for organic solvents.

Heated Cleaned Glass Fiber

Traces of oil sizing removed by head cleaning, yielding virgin glass fiber. Recommended for high temperatures and high corrosion applications.  For use to 750˚F.


Chemical resistance similar to polypropylene, with higher temperature resistance. For use to 350˚F.


Fluid compatibility similar to bleached cotton, but with more coarse fibers, and less absorbent than cotton. Swells in aqueous solutions. For use to 300˚F.