Pak® Lenticular Depth Filter Cartridges

ErtelAlsop Pak depth filter cartridges, also known as depth lenticular filter modules, are available in several configurations and options. Lenticular cartridges, or modules, are manufactured in 12 inch (30.5 cm) or 16 inch (40.6 cm) diameter and include from 5 to 18 stacked lenticular filter cells. A Pak® is assembled from varying numbers of filters cell. Each filter cell is comprised of a pair of Micro-Media, Alpha-Media or Micro-Clear depth filter media sheets where the edges of each pair is sealed by a patented process, using polypropylene. The assembled unit resembles a stack of double convex lenses, hence the term “lenticular.”

Lenticular filter cartridges are available in three construction formats:

  • Polypropylene cores and flat end cap gaskets
  • Polypropylene cores and double O-ring end cap gaskets

To meet the demands of various applications, depth filters can be supplied with options including water removal, pharmaceutical grade material, or polypropylene filter media.

Water removal is achieved using the ZetaDri-Pak lenticular filter cartridge for oil based products and with the AquaKv-Pak for transformer oil filtration in the electric utility industry. By providing a separate material to remove at least 84 ounces of water per 9-cell lenticular cartridge, this concept provides dual phase separation, removing not only water but also particulate contaminant. The ZetaDri or AquaKv option is available with any grade of media.

Polypropylene filter media can be used in place of the standard cellulose-based filter media for products that are not cellulose compatible. Manufacturing the cartridge with the polypropylene core style results in an entirely polymeric filter element with your choice of Buna-N, Neoprene, Viton, Silicon, or Teflon Encapsulated gasket.

Available ProductsFeaturesOptions
Zeta-Pak – High flow rate, positive electrical charge, and superior retention of ultrafine particles.
ZetaDri-Pak – Ability to capture free and emulsified water from your product.
Disc-Pak – 100% Cellulose – Filtration of liquids in the light to medium viscosity range.
Bio-Pak – Pharmaceutical grade media with double-O-ring gaskets.
AquaKv-Pak – For the retention of water contamination in transformer and turbine lube oils.
Highly Efficient Particle Retention
All Pak® lenticular cartridges utilize ErtelAlsop depth filter media, which provides a wide range of particle retention with high solids loading capacity. Nominal retentions range from 0.25 to 15 microns.

Sizes Available Over 300 precision dies are available to fit virtually any filter press.

High Solids Loading
The complex matrix of fibers and particles of filter aid create a structure which allows for greater concentration of particles than most surface retention filter media.
High Efficiency and Zeta-Potential
All ErtelAlsop filter media with filter aid and/or carbon exhibits a positive Zeta-Potential over a wide pH range. This allows for the removal of negatively charged particles smaller than the pore size of the filter media, providing additional solids loading capacity.

Wide Compatibility

Pak® lenticular cartridge elements use cellulose/filter aid media, polypropylene, stainless steel, and appropriate elastomers, which allow for excellent product compatibility. ErtelAlsop also offers the Pak® lenticular cartridge with polypropylene filter media, if cellulose or filter aid are not compatible with your product.

Diameter: 12 inch or 16 inch
Height: 7 1/2″ or 10 7/8″
Number of cells: 5 to 18
Media Formulation: Alpha-Media – 100% Cellulose, Micro-Media – Cellulose with filter aids and wet strength resin, Micro-Media: L Series – Celpure® High Purity Diatomaceous Earth, Micro-Media: XL Series  – Celpure® High Purity Diatomaceous Earth, Micro-Media: LXL Series – Celpure® & High Purity Cellulose, Micro-Clear – Cellulose, D.E. & Activated Carbon, Pharmaceutical Grade Media – Lot traceable back to the raw material suppliers.
Materials of Construction: Filter Media, Polypropylene, and Stainless Steel (optional)
Gasket End Cap: Double-O-Ring or Flat Gasket
Gasket Material: Viton®, Buna-N, Neoprene, EPDM, Silicone, and Teflon® Encapsulated