ErtelAlsop Pak® Lenticular Filters: The Workhorse of Depth Filtration

Purecowater is proud to feature ErtelAlsop Pak® Lenticular Filters, the industry standard for high-performance depth filtration. Designed to provide superior retention efficiencies and ease of use, these lenticular cartridges are the modern evolution of traditional plate and frame filtration methods.

Whether you are dealing with botanical extracts, pharmaceuticals, or food and beverage processing, the ErtelAlsop Zeta-Pak® and Micro-Media® series offer a totally enclosed, leak-free solution for tackling solid and liquid filtration problems.

What are ErtelAlsop Pak Lenticular Filters?

The Pak® Lenticular Filter module (often called a cartridge) utilizes the same high-quality depth filter media found in plate and frame filters but packages it in a convenient, sealed modular format. Invented by Alsop Engineering in the 1940s and continuously improved, these filters are designed for critical liquid processing applications [ertelalsop.com].

The cartridges consist of stacked filter cells (typically 16 per module) comprised of Micro-Media® or MicroClear® depth filter sheets. The edges are sealed using a patented polypropylene process, ensuring structural integrity and preventing bypass. This design allows for:

• High Solids Loading: The complex matrix of fibers and filter aid creates a structure capable of holding significant particulate loads.
• Enclosed System: Eliminates leakage and exposure associated with open plate and frame presses.
• Rapid Change-Out: Modules can be swapped in minutes, significantly reducing downtime compared to manual filter presses.

Product Specifications

The ErtelAlsop Pak series is highly versatile, available in various micron ratings and configurations to fit standard housing vessels. The Zeta-Pak® is known as the workhorse of the line, providing excellent zeta potential for retaining ultra-fine particles [store.clearsolutionscorp.com].

Specification	Details
Diameters	12 inch and 16 inch
Micron Ratings	0.25 µm – 10.0 µm (Nominal)
End Configurations	Flat Gasket, Double O-Ring
Core Material	Polypropylene
Gasket Material	EPDM (Ethylene Propylene Diene Monomer)
Filter Media	Cellulose impregnated with Diatomaceous Earth (DE) or Perlite
Cell Count	Typically 16 cells per module

These filters come pre-impregnated with Diatomaceous Earth (DE), which forms a rigid, porous “cake” that sieves out particulate matter without affecting the odor or taste of the liquid—a critical feature for food and beverage applications [store.clearsolutionscorp.com].

Key Applications

Due to their rugged construction and high flow rates, Pak lenticular filters are utilized across a wide spectrum of industries:

• Botanical Extraction: The large surface area and DE content efficiently remove waxes and lipids from extracts while maintaining high flow rates [store.clearsolutionscorp.com].
• Pharmaceuticals: Used for particulate removal and clarification in API production.
• Food & Beverage: Ideal for filtering spirits, syrups, and edible oils where taste integrity is paramount.
• Chemicals & Solvents: Polypropylene supports and EPDM gaskets ensure compatibility with numerous solvent types [store.clearsolutionscorp.com].
• Cosmetics: Clarification of perfumes and lotions.

Lenticular Filter Housings

To maximize the performance of Pak modules, they are paired with specialized lenticular housings. ErtelAlsop offers these in both vertical and horizontal configurations. The Horizontal Filter Housing is particularly notable for its “Lock and Load” system, which allows for single-person operation and easy loading of cartridges without overhead hoists [ertelalsop.com].

Why Choose Lenticular over Plate & Frame?

Feature	Lenticular Pak®	Plate & Frame
System Design	Totally enclosed	Open (potential for leakage)
Change-out Time	Minutes (Quick-change)	Hours (Manual disassembly)
Product Loss	Minimal	Higher retention in press

For more information on sizing, media selection, or housing compatibility, Purecowater is here to assist with your filtration requirements.