Advanced Depth Filtration for Critical Applications
For industries requiring high-purity filtration with efficient solids loading, ErtelAlsop Pak® Lenticular Filters represent a significant evolution in depth filtration technology. As a distributor and OEM partner, Purecowater provides these versatile modules to solve complex liquid filtration challenges ranging from botanical extraction to pharmaceutical processing.
The ErtelAlsop Pak® system offers the superior retention capabilities of ease-of-use depth filter media in a sealed, user-friendly cartridge format. This design eliminates the leakage and maintenance often associated with traditional plate and frame filter presses while maximizing surface area in a compact footprint.
What is a Pak® Lenticular Filter?
A “Pak” (or lenticular module) consists of multiple individual filter cells stacked vertically. Each cell is constructed from two discs of depth filter media sealed around the edges using a patented polypropylene molding process. These cells are stacked on a central core and compressed to form a robust cartridge unit.
The “lenticular” design facilitates a specific flow path: liquid enters the housing surrounding the module, passes through the media into the center of the discs, and exits through the central core. This structure allows for a high flow rate and excellent structural integrity.
Key Advantages
- Zeta Potential: Many formulations, such as the Zeta-Pak®, utilize media modified with a net positive charge (Zeta Potential). This allows the filter to electrokinetically attract and capture negatively charged sub-micron particles (like haze, bacteria, or pyrogens) that are smaller than the media’s physical pore size.
- Enclosed System: Unlike open filter presses, lenticular modules operate inside sealed housings, preventing product loss, reducing exposure to the atmosphere, and protecting operators from fumes or hazardous fluids.
- Scalability: Available in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells), allowing systems to scale from pilot batches to large industrial production easily.
Product Configurations and Media Types
ErtelAlsop offers distinct product lines tailored to specific viscosity, compatibility, and retention requirements. Choosing the right media formulation is critical for process optimization.
| Model Series | Primary Media | Primary Applications |
|---|---|---|
| Zeta-Pak® | Micro-Media®: Cellulose, Filter Aid (DE/Perlite), Resin Binder | The “workhorse” series. Ideal for botanical extracts, haze removal, chemicals, and general clarification. High Zeta Potential. |
| Disc-Pak® | AlphaMedia™: 100% Cellulose (No resins or fillers) | Used where purity is paramount and no extractables are desired. Excellent for dielectric oils, fragrances, and syrups. |
| Bio-Pak® | Pharmaceutical Grade Media | Critical pharmaceutical and biotech applications. Supplied with double O-ring seals to prevent bypass. |
| AquaKv-Pak® | Water Absorptive Media | Designed to remove free and emulsified water from transformer oils and lubricating fluids while filtering particulates. |
Technical Specifications
Purecowater supplies Pak® filters in standard industry sizes to fit existing housings or new installations. The specifications below outline the versatility of these modules.
| Feature | Specification Selection |
|---|---|
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| Module Diameters | 12 inch (30.5 cm) / 16 inch (40.6 cm) |
| End Cap Styles | Flat Gasket, Double O-Ring (222, 226 equivalent fits) |
| Core Material | Polypropylene (Standard) or Stainless Steel Straps |
| Gasket Materials | EPDM, Viton, Buna-N, Silicone, Teflon Encapsulated |
| Cell Count | Standard 16 cells (High Area), varies 5 to 18 |
Industry Applications
The versatility of the ErtelAlsop media allows these filters to serve a wide array of markets. Purecowater can assist in identifying the correct grade for your specific process stream.
- Botanical Extraction: Efficient removal of waxes, lipids, and biomass in ethanol or hydrocarbon extraction processes using Zeta-Pak modules impregnated with Diatomaceous Earth (DE).
- Food & Beverage: Clarification of syrups, distilled spirits, wines, and edible oils.
- Cosmetics: Polishing of fragrances, essential oils, and gels.
- Utilities & Power: Purification of transformer oils and coolants using water-absorptive AquaKv-Pak modules.
- Pharmaceuticals: API filtration, cell broth clarification, and removal of endotoxins.
Need Assistance with Filtration Sizing?
Selecting the right micron rating and media composition varies heavily based on fluid viscosity and solid load. Whether you need to replace existing lenticular modules or design a new filtration skid, Purecowater ensures you get the exact specification for your needs.