ErtelAlsop Pak® Lenticular Filters: Specification & Product Guide

For industries requiring high-performance depth filtration without the mess and exposure of traditional methods, ErtelAlsop Pak® Lenticular Filters set the standard. Available through Purecowater, these advanced filter modules combine the precision of depth media with the convenience of a totally enclosed, easy-to-change cartridge system.

Whether you are filtering botanical extracts, pharmaceuticals, distilled spirits, or industrial fluids, the ErtelAlsop Pak® series offers a scalable and hygienic solution. This guide illustrates the technical specifications, media options, and operational benefits of switching to lenticular technology.

What are Lenticular Pak® Cartridges?

ErtelAlsop Pak® cartridges, also known as depth lenticular filter modules, are essentially a stack of depth filter sheets assembled into a convenient unit. Instead of manually loading individual sheets into a Plate & Frame press, operators load a single module inside a housing.

Each module consists of stacked filter cells (typically 12-inch or 16-inch diameters). A single cell is formed by two discs of filter media sealed at the edges, resembling a double convex lens. This design maximizes surface area and solids loading capacity within a compact footprint.

Key Advantages Over Plate & Frame Filters

• Totally Enclosed System: Prevents product exposure to the environment, reducing contamination risks and product loss.
• Rapid Change-Out: Modules can be replaced in minutes rather than hours, significantly reducing downtime.
• Scalability: Over 300 precision dies are available, allowing processes to scale from lab pilot testing to full production seamlessly.
• Leak-Free Design: Edge sealing via a patented polypropylene process ensures zero bypass.

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Types of Pak® Media Formulations

Selecting the right media is crucial for optimization. ErtelAlsop offers distinct series based on the fluid viscosity and the nature of the contaminants.

1. Zeta-Pak® (The Workhorse)

The Zeta-Pak® series incorporates mineral filter aids like Diatomaceous Earth (DE) into the cellulose matrix. This creates a rigid, porous structure ideal for trapping ultra-fine particles and removing hazes.

• Best For: Botanical extracts (removing waxes/lipids), pharmaceuticals, and general food & beverage applications.
• Feature: High positive zeta potential enhances the removal of negatively charged sub-micron particles.

2. Disc-Pak® (All-Cellulose)

The Disc-Pak® utilizes AlphaMedia™, which is 100% cellulose and contains no removing mineral aids or resins. This is critical for applications where preserving the chemical integrity of the active ingredients is paramount.

• Best For: Dielectric oils, perfumes, syrups, and light-to-medium viscosity fluids.
• Feature: Pure cellulose construction ensures no inorganic extractables.

Technical Specifications

Review the data below to determine the compatibility of ErtelAlsop Pak® filters with your current system setup.

Feature	Specification Details
Diameters Available	12-inch (30.5 cm) and 16-inch (40.6 cm)
Micron Ratings (Nominal)	0.25 µm to 15 µm (Common: 1, 2.5, 5, 10 µm)
Cell Count per Module	5 to 18 cells (Standard is often 16 cells)
Gasket / End-Cap Styles	Flat Gasket or Double O-Ring (222/226 style)
Gasket Materials	EPDM, Buna-N, Viton, Silicone, PTFE Encapsulated
Core Material	Polypropylene (Stainless steel options available)
Max Operating Temp	Typically up to 180°F (82°C) depending on polymer supports

Common Applications

Thanks to the versatile media options, ErtelAlsop Lenticular Filters are deployed across a wide range of industries served by Purecowater:

Need Help Selecting the Right Module?

Choosing between Zeta-Pak® and Disc-Pak® or determining the correct micron rating requires technically vetting your process fluid. Purecowater is here to assist with sizing and compatibility.

Ready to improve your filtration efficiency?