ErtelAlsop Pak® Lenticular Filters

High-Performance Depth Filtration Solutions

For industries requiring rigorous liquid clarification and solids removal, ErtelAlsop Pak® Lenticular Filters represent a significant evolution in filtration technology. As a distributor and OEM partner, Purecowater provides these advanced depth filter modules to replace traditional, labor-intensive plate and frame methods with a sealed, user-friendly, and highly efficient system.

What is a Lenticular Filter?

The ErtelAlsop Pak® Lenticular Filter is a depth filtration cartridge designed to combine the superior filtration characteristics of filter sheets with the convenience of a cartridge format. Originally invented by Alsop Engineering, this technology utilizes an accordion-like stack of lenticular cells. Each cell consists of two discs of depth media (Micro-Media®) sealed around a polypropylene core.

Unlike surface filters that trap particles only on the outer layer, these depth filters utilize a tortuous path through a complex matrix of cellulose, wet-strength resin, and filter aids (such as Diatomaceous Earth or Perlite). This allows them to retain particles throughout the entire thickness of the media, resulting in high solids loading capacity and exceptional filtrate clarity.

Key Advantages

• Eliminates Leakage: The fully enclosed housing design ensures zero leakage, protecting operators from hazardous fluids and preventing product loss/oxidation.
• Rapid Change-out: Modules can be replaced in a fraction of the time required to dress a standard plate and frame press.
• Scalability: Housings can accommodate multiple stacked modules, allowing for vertical scalability with a minimal footprint.
• Zeta Potential: The media exhibits a positive electrokinetic charge (Zeta Potential), attracting and holding negatively charged ultra-fine particles smaller than the mechanical micron rating.

Technical Specifications

The Pak® Lenticular Filters are versatile and fit a wide range of housings. Below are the standard specifications available through Purecowater.

Specification	Details
Available Diameters	12 inch (30 cm) and 16 inch (40 cm)
Micron Ratings	0.25 µm – 15.0 µm (Nominal)
End Cap Configurations	Flat Gasket (DOE) or Double O-Ring (Plug-in)
Core Material	Polypropylene
Gasket Materials	EPDM, Viton, Silicone, Buna-N
Max Operating Temp	Typically up to 180°F (82°C) depending on gasket/media
Filter Area (approx)	Up to 1.8 m² per 12″ module; higher for 16″ variants

Lenticular vs. Plate & Frame Press

Many facilities are upgrading from open plate and frame presses to lenticular systems. The following comparison highlights why the ErtelAlsop Pak® provides a better operational experience.

Feature	Pak® Lenticular System	Plate & Frame Press
System Setup	Enclosed, Sanitary Housing	Open Frame (Drip Pan Required)
Change-out Time	Minutes (Modular Cartridges)	Hours (Individual Sheets)
Product Loss	Minimal (Housing Volume Only)	Moderate to High (Edge Leakage)
Fume Exposure	None (Closed Loop)	High (Open Atmosphere)

Applications

Because they combine high flow rates with the ability to remove haze and fine particulates, ErtelAlsop Pak® filters are the “workhorse” in many sectors:

• Pharmaceuticals: API processing, large volume parenterals (LVPs), and solvent clarification.
• Botanical Extracts: Removal of waxes, lipids, and color (using Carbon-impregnated media) for CBD/cannabis and herbal oils.
• Food & Beverage: Distilled spirits polishing, syrup clarification, and haze removal in wines and vinegars.
• Chemicals & Utilities: Transformer oil filtration (dielectric fluids), silicone processing, and specialty chemical manufacturing.

Ordering Information

ErtelAlsop Pak® filters come in various media grades, including the generic Zeta-Pak® and Micro-Media® series. Whether you need standard removal or activated carbon for color correction, we can specify the correct grade for your process stream.

Note: Proper housing selection is critical. We offer both vertical and horizontal housings, as well as sanitary designs.

Reference Sources: Clear Solutions Corp, ErtelAlsop.