Advanced Depth Filtration with ErtelAlsop Pak® Lenticular Cartridges
For industries requiring high-purity liquid filtration with the ease of a closed system, the ErtelAlsop Pak® Lenticular Filters offer a superior solution. Combining the proven efficiency of depth filter media with the convenient handling of a cartridge design, these modules are the modern standard for pharmaceutical, food and beverage, and industrial chemical applications.
At Purecowater, we supply the full range of ErtelAlsop Lenticular Pak® cartridges, designed to tackle complex solid and liquid filtration problems ranging from botanical extraction to sanitary pharmaceutical processing.
What is a Lenticular Filter?
The “Lenticular” design refers to the stack of double-convex filter cells that make up the cartridge. Unlike traditional plate and frame filters which can be labor-intensive and open to the environment, a Lenticular Pak® is a totally enclosed, pre-assembled unit.
Each module consists of stacked filter cells—typically ranging from 5 to 18 cells per unit—sealed using a patented polypropylene edge process. This design provides a massive surface area for depth filtration within a compact footprint. The result is high solids loading capacity and exceptional particle retention without the leakage or drip-loss often associated with filter presses.
Key Features and Benefits
- Scalability: Available in 12-inch (30.5 cm) and 16-inch (40.6 cm) diameters, allowing for linear scalability from pilot testing to full-scale production.
- Versatile Media Options: Modules can be outfitted with various ErtelAlsop media grades, including MicroMedia® (with filter aids), AlphaMedia® (100% cellulose), and MicroClear® (immobilized activated carbon).
- Zero Drip Loss: The enclosed housing design ensures zero fluid loss, making it ideal for processing expensive fluids like syrups, spirits, and essential oils.
- Sanitary & Industrial Configurations: Available with Flat Gasket or Double O-Ring end caps to fit diverse housing requirements.
Product Specifications
Designed to fit a wide range of housings, the Pak® cartridges allow for precise filtration across nominal retention ratings. Below are the standard specifications for these modules:
| Specification | Details |
|---|---|
| Diameter Sizes | 12″ and 16″ |
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| Cell Count | 5 to 18 cells per module |
| End Cap Configurations | Flat Gasket, Double O-Ring (Plug-in) |
| Core Material | Polypropylene (Standard), Stainless Steel (Optional) |
| Gasket Materials | EPDM, Viton, Silicone, Buna-N |
Available Series and Applications
ErtelAlsop manufactures specialized versions of the Pak® to suit specific industry needs. Choosing the right series ensures optimal throughput and compatibility.
Zeta-Pak® (General Purpose & Pharma)
The workhorse of the product line, Zeta-Pak® utilizes the MicroMedia® series, incorporating high-purity cellulose and filter aids (like Diatomaceous Earth) to provide heavy solids loading and excellent haze removal. Ideally used in:
- Pharmaceuticals and Biotechnology
- Distilled Spirits (removing haze without stripping flavor)
- Food and Beverage Processing
Disc-Pak® (All-Cellulose)
Constructed from 100% AlphaMedia® cellulose, the Disc-Pak® is free from inorganic filter aids. It is perfect for applications where mineral extractables must be minimized.
- Dielectric Oils
- Cosmetics and Perfumes
- Protein Solutions
Bio-Pak® (High Purity)
Designed for critical applications, the Bio-Pak® features a completely stainless-steel-free construction with a double O-ring seal. This ensures positive sealing and prevents bypass, critical for sterilizing-grade pre-filtration.
MicroClear® (Activated Carbon)
These modules contain immobilized activated carbon, allowing for adsorption applications (such as color or odor removal) without the mess of handling bulk carbon powder.
Why Choose Lenticular Over Plate & Frame?
While plate and frame filters are effective, switching to a Pak® Lenticular system significantly reduces change-out time and labor costs. The enclosed housing protects operators from exposure to process fluids and prevents external contamination—a critical factor in cleanroom environments and hazardous chemical processing.
Whether you require the high flow rates of the 16-inch modules or the precise polishing of a 12-inch stack, Purecowater works directly with OEMs to provide the exact configuration your facility requires.
Do you need assistance selecting the correct micron rating or media type for your application? Purecowater is here to help you optimize your filtration process.