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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Savings on Aramid Dust Bags

AJR is pleased to announce significant price reductions on dust collector filter bags constructed from made in the USA 14 oz. singed aramid felt. Owing to aggressive sourcing efforts, we are able to pass along 20% to 30% price reductions on dust bag pricing, depending on the bag configuration and size.


AJR offers your choice of end treatments, ground wires or grounding tabs, with dust bag styles to fit most current and legacy dust collector models in operation.

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