ErtelAlsop Pak Lenticular Filters: High-Efficiency Depth Filtration

Efficient filtration is critical for maintaining product purity in industries ranging from pharmaceuticals to food and beverage. At Purecowater, we specialize in solving complex solid and liquid filtration challenges. Among our premier depth filtration offerings are the ErtelAlsop Pak® Lenticular Filters. These cartridges provide a robust, sealed alternative to traditional plate and frame filters, combining high solids loading capacity with ease of operation.

What Are ErtelAlsop Pak® Lenticular Filters?

The ErtelAlsop Pak® product line consists of depth filter cartridges—often referred to as modules—constructed from stacked lenticular cells. This technology, originally invented by Alsop Engineering, revolutionizes depth filtration by packaging the media into a totally enclosed, disposable format.

Each module is assembled from varying numbers of filter cells (typically 5 to 18 stacks). The cells are composed of double convex pairs of depth filter media (such as MicroMedia® or AlphaMedia®) sealed together using an over-molding process. This design resembles a stack of lenses, giving the filter its “lenticular” name.

Why Switch from Plate & Frame to Lenticular?

While plate and frame filters have been the industry standard for decades, they present challenges regarding leakage, cleaning labor, and exposure to the environment. The Pak® Lenticular design addresses these issues:

• Closed System: Prevents fluid loss and protects the product from external contamination.
• Rapid Change-out: Modules can be replaced in minutes rather than the hours required to dress a filter press.
• Scalability: Available in 12-inch and 16-inch diameters to fit various flow rate requirements.
• Zero Bypass: Precision-engineered gaskets and sealing ensure all liquid passes through the media.

Product Series and Media Options

ErtelAlsop offers distinct series of Pak® cartridges tailored to specific chemical compatibilities and filtration goals. Below is a breakdown of the primary options available through Purecowater.

Series Name	Media Composition	Primary Characteristics
Zeta-Pak®	Cellulose, Diatomaceous Earth (DE) / Perlite, Resin	The industry “workhorse.” High positive zeta potential for removing ultra-fine particles, haze, and mist. Ideal for biologicals and beverages.
Disc-Pak®	100% Cellulose (AlphaMedia®)	Mineral-free. Best for applications sensitive to silica or DE. Commonly used for dielectric oils, fragrances, and organic extracts.
Bio-Pak®	Pharmaceutical Grade Media	Designed for critical pharmaceutical applications requiring low extractables and high purity.
MicroClear®	Immobilized Activated Carbon	Standardizes carbon treatment without the mess of loose bulk carbon. Used for color correction and odor removal.

Technical Specifications

Understanding the technical capabilities of the Pak® Lenticular Filters helps in selecting the right module for your housing and process flow.

Micron Ratings (Nominal)	0.25 µm to 15 µm
Module Diameters	12-inch (30.5 cm) and 16-inch (40.6 cm)
Number of Cells	Typically 5 to 16 cells per module (customizable)
End Cap Configurations	Flat Gasket or Double O-Ring (standard industry fitments)
Core Material	Polypropylene (Standard)
Gaskets	Butt weld, flat gasket, or molded O-rings available in various elastomers

Common Applications

Due to the versatility of the media—ranging from carbon-impregnated to pure cellulose—ErtelAlsop Pak® cartridges are utilized across diverse sectors:

• Food & Beverage: Filtration of distilled spirits, syrups, soft drinks, and chill-haze removal in beer and wine.
• Pharmaceuticals: Clarification of broths, removal of lipids, and protection of downstream sterile membranes.
• Cosmetics: Polishing perfumes, colognes, and essential oils to ensure crystal clarity.
• Chemical & Utility: Maintenance of dielectric oils for transformers (using Disc-Pak®) and filtration of process chemicals.
• Botanical Extraction: Winterization and wax removal from ethanol or hydrocarbon extracts.

Contact Purecowater for Filtration Solutions

As a distributor for top-tier filtration brands, Purecowater ensures you get the exact specifications required for your operational success. Whether you are sizing a new housing or looking for replacement depth modules, our team is ready to assist.