EEF Series

EEF SeriesString Wound Filter Cartridge

AJR Filtration proudly offers the EEF series of string wound filters, formerly sold under the Delta Pure name. EEF "Extremely Efficient Filtration" series string wound filters employ a 3-ply SMS polypropylene nonwoven final filter layer downstream of a wound pre-filter section. These filters remove a much higher percentage of fine particulate compared to traditional string wound filters – up to 99% of 0.5 micron particles.

Filter users with challenging fluids who need to remove particulates at or below 1 micron diameter, as well as those who want the economics and chemical compatibility of a string wound filter, have long relied on the EEF Series. Nominal removal ratings of 0.2, 0.5, 1, and 2 micron are available.

The EEF series of depth filters offer a choice of pre-filtration media and support cores. End fitting options allow the retrofitting of most filter housings. Precision winding geometry provides consistent and controlled pre-filtration to the downstream nonwoven final layer in order to achieve high dirt holding capacity. Cartridges are available in continuous lengths from 3” to 72” and diameters from 2" to 4.5”.


  • Wide range of materials to ensure process compatibility 
  • Variety of sizes and configurations to ensure proper sizing, fit, and sealing
  • High sediment holding capacity for longer time between filter changes
  • Efficient removal of particles < 1um
  • Continuous lengths up to 72"
  • Technical support
  • Fast lead times
  • Process water
  • Catalyst fines removal
  • Inks, paints, coatings
  • Carbon fines
  • Pre-filtration for membrane/ reverse osmosis (RO) systems
  • Food and beverage
  • Chemicals, acids, bases
  • Solvents, organics

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AJR Filtration has added string wound, melt blown, and carbon wrapped filter cartridges, formerly from Delta Pure Filtration to our product offering.  The expanded portfolio enhances AJR's position as a leading US manufacturer of high-quality engineered liquid and dust filtration products. All production and support operations continue under one roof in our West Chicago, IL filtration headquarters. Delta Pure part numbers will not change.  We look forward to serving your liquid filtration needs with more quality filter options, greater economies, and the convenience and simplicity of a single customer account. 

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