ErtelAlsop Pak Lenticular Filters: Advanced Depth Filtration

For industries demanding superior fluid purity and process efficiency, ErtelAlsop Pak Lenticular Filters represent the gold standard in depth filtration technology. As a distributor for top-tier filtration solutions, Purecowater is proud to offer these versatile modules, designed to tackle the most challenging solid/liquid separation problems.

The ErtelAlsop Pak® system bridges the gap between traditional plate and frame filters and modern cartridge convenience. By utilizing a totally enclosed design, these filters eliminate leakage and external contamination, making them ideal for pharmaceuticals, botanical extractions, and food and beverage applications.

What is a Pak Lenticular Filter?

ErtelAlsop’s Zeta-Pak® and Pak® lenticular cartridges are depth filter modules constructed from premium Micro-Media®. Unlike surface filters that only trap particles on the exterior, these lenticular modules utilize a thick, porous matrix to trap contaminants throughout the entire depth of the media. This results in high solids loading capacity and exceptional retention of ultra-fine particles, hazes, and lipids.

The modules are composed of lenticular cells—stacked discs of filter media—that are edge-sealed and assembled into a cartridge format. This design allows operators to easily load and unload the filters into a housing, significantly reducing downtime compared to changing out dozens of individual sheets in a plate press.

Feature	Benefit
Totally Enclosed System	Prevents product loss, protects operators from exposure, and ensures sanitary processing.
Zeta Potential	Electrokinetic attraction captures particles smaller than the mechanical pore size (e.g., haze, endotoxins).
Scalable Design	Same media used in lab-scale and large-scale plate filters, allowing for easy scale-up.
Pre-Impregnated Media	Available with Diatomaceous Earth (DE) or Perlite for specific filtration goals without the mess of loose powder.

Key Applications and Industries

The versatility of the Pak lenticular design makes it a “workhorse” across various sectors. The modules are particularly valued where high flow rates must be balanced with strict retention efficiencies.

Botanical Extraction and Hemp Processing

In the botanical extract market, removing waxes, lipids, and fine particulate is critical for product clarity and quality. The Zeta-Pak® series, often impregnated with Diatomaceous Earth (DE), acts as an efficient dewaxing agent. The large surface area allows for high throughput, while the DE aids in selective adsorption of unwanted lipids without stripping desirable compounds [clearsolutionscorp.com].

Pharmaceuticals and Life Sciences

For applications requiring strict bio-burden reduction, the enclosed nature of the lenticular housing ensures a sanitary environment. These filters are used for the clarification of syrups, serums, and other viscous biological fluids.

Food & Beverage

From distilled spirits to sugar syrups, ErtelAlsop filters provide haze removal ensuring the final product is polished and shelf-stable. The media is designed to have virtually no effect on the odor or taste of the liquid.

Technical Specifications

Understanding the specifications is crucial for selecting the right module for your housing. ErtelAlsop Pak modules are compatible with most standard lenticular housings on the market.

Specification	Details
Micron Ratings	0.25 µm to 15 µm (Common ratings: 1.0, 2.5, 5.0 µm)
Diameters	12 inch (1.8 m² area) and 16 inch (3.6 m² area)
End Configurations	Flat Gasket or Double O-Ring
Core Material	Polypropylene (Standard), Stainless Steel (Optional)
Gasket Material	EPDM, Nitrile, Viton, Silicone
Media Types	Cellulose, Micro-Clear® (Carbon), Micro-Media® (DE/Perlite)

Why Choose ErtelAlsop?

ErtelAlsop has been a leader in depth filtration since the 1940s [ertelalsop.com]. Their commitment to continuous improvement has led to innovations like the Zeta-Pak®, which provides one of the greatest retention efficiencies in the industry. Whether you need a simple flat gasket seal or a double O-ring specifically designed for solvent resistance, the variety of configurations ensures compatibility with your specific process stream.