Advanced Depth Filtration for Industrial and Sanitary Applications
For industries requiring rigorous liquid filtration standards—from pharmaceutical production to botanical extraction and food and beverage processing—ErtelAlsop Pak® Lenticular Filters offer a premier solution. As a distributor for top-tier filtration technologies, Purecowater is proud to offer these high-performance depth filter modules designed to tackle complex solid and liquid separation challenges.
The ErtelAlsop Pak® cartridges, often referred to as lenticular modules, combine the precision of depth filter media with the convenience of a modular cartridge design. This enclosed system prevents leakage and atmospheric contamination, making it a superior alternative to traditional plate and frame filter presses.
What Are Pak® Lenticular Cartridges?
A “Pak” or lenticular cartridge is assembled from a stack of individual filter cells. Each cell consists of two sheets of depth filter media (such as MicroMedia® or AlphaMedia®) sealed together at the edges using a patented polypropylene process. These cells are stacked on a central core to form a unit that resembles a series of double convex lenses—hence the term “lenticular.”
These modules are engineered to fit into uniform housings, allowing for scalable filtration surface areas without changing the footprint of your equipment significantly. They utilize a tortuous path filtration mechanism to capture a wide range of particle sizes while maintaining high flow rates.
Key Features and Technologies
- Zeta Potential Retention: Many Pak® modules, specifically the Zeta-Pak® series, utilize electrokinetic adsorption (zeta potential) to remove ultra-fine particles, haze, and biological contaminants that are smaller than the mechanical rating of the filter.
- High Solids Loading: The depth media structure allows for significant contaminant holding capacity, reducing change-out frequency compared to surface filters.
- Scalability: Available in 12-inch and 16-inch diameters with varying cell counts (up to 18 cells per module) to suit different batch sizes and flow requirements.
- Leak-Free Design: The modules are sealed to prevent bypass, ensuring consistent filtrate quality.
Technical Specifications
ErtelAlsop Pak® filters are versatile and can be configured to meet specific chemical and thermal resistance needs. Below are the general specifications for the standard industrial and pharmaceutical lines.
| Specification | Details |
|---|---|
| Module Diameters | 12 inch (30.5 cm) and 16 inch (40.6 cm) |
| Micron Retention Range | 0.25 µm to 15 µm (Nominal) |
| Standard Cell Counts | 9, 12, 16, or 18 cells per module |
| End Cap Configurations | Flat Gasket, Double O-Ring (222/226 style) |
| Core Material | Polypropylene (Standard) |
| Gasket Material | EPDM (Standard), Silicone, Viton, Buna-N available |
| Filtration Media Options | MicroMedia® (Perlite/DE enhanced), AlphaMedia® (Cellulose), MicroClear® (Activated Carbon) |
Primary Applications
The versatility of the Pak® Lenticular Filters makes them appropriate for a wide variety of sectors. Their enclosed design is particularly beneficial where product hygiene or hazardous solvent containment is critical.
1. Botanical Extraction & Hemp Processing
Lenticular filters are the industry standard for winterization and wax removal. The Zeta-Pak® modules, containing diatomaceous earth, are highly effective at removing lipids and fine particulates from ethanol extractions without affecting the desired chemical profile.
2. Distilled Spirits and Beverages
Used extensively for chill haze removal and polishing filtration in spirits (whiskey, vodka, gin) and wine. The media ensures optical clarity and shelf stability by removing haze-forming proteins.
3. Pharmaceuticals and Cosmetics
For applications requiring strict purity, pharmaceutical-grade modules provide filtration for syrups, fragrances, and active pharmaceutical ingredients (APIs), ensuring compliance with rigorous safety standards.
4. Chemical and Utility Fluids
Effective for filtering insulating oils (dielectric fluids), removal of carbon from catalysts, and general clarification of varnishes and specialty chemicals.
Available Media Formats
- Zeta-Pak®: The workhorse of the line, providing maximum retention efficiency using wet-strength cellulose and filter aids (DE or Perlite). Ideal for sub-micron reduction.
- Bio-Pak®: Designed for biological reduction and critical applications.
- Disc-Pak®: Cellulose-based media for standard clarification duties.
- MicroClear®: Immobilized activated carbon media effectively removes color and odor without the mess of bulk carbon powder.
Upgrade Your Filtration System
Whether you are replacing traditional filter presses or upgrading existing lenticular housings, ErtelAlsop Pak® cartridges provide a reliable, high-efficiency solution. Purecowater can help you determine the correct micron rating, media type, and housing configuration for your specific process stream.
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