• High efficiency filter media-0.25 to 15 microns nominal plus Zeta-Potential enhanced removal
• Materials of construction-filter media, polypropylene or stainless steel with choice of gasket material
• Media Formulations-100% cellulose, cellulose with DE filter aid and wet strength resin, cellulose with filter aid and activated carbon with wet strength resin
• Low extractables
• Enclosed filtration system-housing available in sanitary, industrial or ASME code design
• Steam sterilizable-ErtelAlsop's unique design and media formulation allow for steam sterilization. (Recommended steaming procedure)
• Scalable--Lab--Pilot--Production-using ErtelAlsop depth media, your filtration system can be scaled from lab all the way to production.

Pharmaceutical Grade Filter Media
ErtelAlsop's "P" grade media is manufactured in accordance with our Drug Master File located at the US Food and Drug Administration Center for Drug Evaluation and Research (CDER), providing the confidence you require when using ErtelAlsop Zeta-Pak® elements in your critical Pharmaceutical or Biotech applications. All Pharmaceutical grade Zeta-Pak® filter cartridges are supplied with a "P" certificate which states that the cartridges contained in that box conform with the information provided in our Validation Guide.

Paks® are available in a variety of configurations based upon the following variables:

• Media - Micro-Media®, Alpha-Media™, Micro-Clear™ (carbon), or Polypropylene, 19 grades in all!
• Diameter - 12" or 16"
• Height - 71/2" or 107/8"
• Add the AquaKv/Dri option for water removal (Up to 150 ounces per Pak®)
• Number of cells from 5 to 18 
• Pharmaceutical grades available
• Low Pyrogen grades available
• Double-O-Ring or Flat Gasket End Cap/li>
• Gasket Material - Viton®, Buna-N, Neoprene,EPDM, Silicone, and Teflon® Encapsulated

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Zeta-Pak®
The Zeta-Pak®, ErtelAlsop's depth filter cartridge for pharmaceutical processing provides relatively high flow rate, positive electrical charge and superior retention of ultrafine particles. From the downstream processing of biopharmaceuticals, human plasma fractionation and the bulk filtration of culture media to LVPs, SVPs, topicals and intermediates filtration, our Zeta-Pak® will provide the result your application requires.
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ZetaDri-Pak®
The ZetaDri-Pak® offers all the benefits of depth filtration plus the ability to capture free and emulsified water from your product. This 50 year old ErtelAlsop invention allows for easy changeout, low labor costs and optimized filtration area and cake space. Our 16 cell ZetaDri-Pak® holds a minimum of 148 ounces of water and allows the operator to simply monitor differential pressure to determine when the Paks® need to be changed. The ZetaDri-Pak® is available in all grades of ErtelAlsop media and can be utilized in various applications where water is a problem. From flavorings to oils, the ZetaDri-Pak® will provide the retention level your application requires.
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Disc-Pak®
The Disc-Pak® cartridge is specially formulated for the precise filtration of liquids in the light to medium viscosity range. From applications such as lubricating oils, dielectric oils and coolants to syrups, beverages and perfumes, the Disc-Pak® may be used where particulate retention is the purpose of filtration. Disc-Pak® cartridges are available in several grades to allow retention down to 1 micron.
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Bio-Pak®
The new Bio-Pak® is ErtelAlsop's double-O-Ring lenticular depth filter cartridge. This filter element is for use in critical applications, providing the utmost assurance that no bypass will occur at cartridge sealing surfaces. It is the first US manufactured lenticular filter cartridge of its kind.
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AquaKv-Pak®
The AquaKv-Pak® was specifically designed and developed for the retention of water contamination in transformer and turbine lube oils along with the retention of particulate down to the sub-micronic level. This Pak® concept was created to incorporate the particulate retention capabilities of the Disc-Pak® along with the enhanced capacity for the retention of free and dissolved water. The AquaKv-Pak® demonstrates mechanical shutoff when fully saturated with water. Particle retention does not effect water-holding capacity, which has been documented at up to 120 ounces per full 9-cell Pak®. The AquaKv-Pak® and an ErtelAlsop enclosed Pak® system can recondition dielectric fluids to meet or exceed ASTM and manufacturers standards.
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Sak-Pak®
The Sak-Pak® is a Fullers Earth or Activated Carbon containing filter element developed by ErtelAlsop as a clean, cost-effective, simple alternative to the traditional means of cake filtration. The Sak-Pak®, when used in an ErtelAlsop Pak® housing, provides a portable enclosed environment. Sak-Paks® are most effective when used after a filtration run through an ErtelAlsop Disc-Pak® or AquaKv-Pak®. The ideal filter system would flow from the supply tank through a Disc-Pak®/AquaKv-Pak® into a second supply tank and back through the Sak-Pak®. Final filtration should be done through another Disc-Pak®/AquaKv-Pak® to remove any stray Fullers Earth or Activated Carbon and ensure containment of particulate matter. The Fullers Earth Sak-Pak® is used in applications where neutralization of oil is the desired goal. An Activated Carbon Sak-Pak® is used when decolorization and/or deodorization are necessary.
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