Advanced Depth Filtration for Critical Applications
For industries requiring precision, reliability, and high solids loading capacity, ErtelAlsop Pak® Lenticular Filters represent the gold standard in depth filtration technology. As a robust solution distributed by Purecowater, these lenticular cartridges (also known as modules) are designed to tackle complex filtration challenges in pharmaceuticals, food and beverage, chemicals, and botanical extraction.
The Pak® system combines the superior retention capabilities of depth filter media with the ease of use of a cartridge format. Whether you are dealing with haze removal in spirits, particulate removal in cosmetics, or critical dewaxing in botanical extracts, the ErtelAlsop Pak® series offers a scalable and leak-free solution.
How Lenticular Filtration Works
The term “lenticular” refers to the lens-like shape of the filter cells. An ErtelAlsop Pak® cartridge is constructed from multiple stacked filter cells. Each cell consists of two discs of depth filter media sealed around the edges using a patented polypropylene molding process. This design maximizes surface area within a compact footprint, resembling a stack of double convex lenses.
Unlike surface filters that trap particles only on the outer layer, these depth filters utilize a complex matrix of fibers and particles to trap contaminants throughout the thickness of the media. This results in:
- High Solids Loading: Ability to hold significant amounts of contaminant before blinding.
- Zeta Potential: Electrokinetic adsorption to capture particles smaller than the micron rating (specific to Zeta-Pak®).
- Structural Integrity: The rigid core and sealed edges prevent bypass, ensuring consistent filtrate quality.
Product Variants & Media Types
ErtelAlsop offers distinct media formulations to suit specific compatibility and performance needs. The two primary configurations available through Purecowater include:
1. Zeta-Pak® (MicroMedia®)
The Zeta-Pak® is the workhorse of the series. It utilizes MicroMedia®, which is composed of cellulose, diatomaceous earth (DE) or perlite, and a wet-strength resin. This combination creates a media with a positive zeta potential, making it highly effective at attracting and holding negatively charged particles like bacteria, haze, and sub-micron colloids.
- Best For: Botanical extracts (dewaxing/lipid removal), biopharmaceuticals, distilled spirits, and haze removal.
- Key Benefit: Combines mechanical sieving with electrokinetic adsorption.
2. Disc-Pak® (AlphaMedia®)
The Disc-Pak® utilizes AlphaMedia®, a 100% cellulose formulation. It contains no inorganic filter aids (like DE or perlite) and no resins. This makes it ideal for applications where mineral extractables are a concern or where chemical purity is paramount.
- Best For: Dielectric oils, syrups, fragrances, and light-to-medium viscosity fluids.
- Key Benefit: Pure cellulose construction preserves active ingredients without altering taste or odor.
Technical Specifications
Below is a detailed breakdown of the configurations and operating parameters for the ErtelAlsop Pak® series.
| Specification | Details |
|---|---|
| Diameters Available | 12-inch (30.5 cm) and 16-inch (40.6 cm) |
| Micron Ratings | Nominal ratings from 0.25 µm to 15 µm |
| Number of Cells | Typically 5 to 18 cells per module (16-cell is common) |
| Core Material | Polypropylene (Stainless steel hardware available for housing) |
| End Cap Configurations | Flat Gasket or Double O-Ring |
| Gasket Materials | EPDM, Buna-N, Silicone, Viton |
| Surface Area | Allows for high flow rates relative to footprint |
Applications by Industry
The adaptability of the Pak® cartridges allows them to replace traditional Plate & Frame filters in many scenarios, reducing change-out time and preventing leakage.
| Industry | Typical Applications | Recommended Media |
|---|---|---|
| Botanical Extraction | Winterization, wax removal, lipid reduction | Zeta-Pak® (MicroMedia) |
| Food & Beverage | Polishing syrups, haze removal in spirits, soft drinks | Zeta-Pak® or Disc-Pak® |
| Pharmaceuticals | Clarification of broths, pre-filtration for membranes | Zeta-Pak® (Pharma Grade) |
| Utilities / Industrial | Dielectric coil oils, coolants, lubricating oils | Disc-Pak® (AlphaMedia) |
Why Choose ErtelAlsop Pak®?
Transitioning to lenticular modules offers significant operational advantages. The enclosed system eliminates the external leakage often associated with filter presses, creating a safer and cleaner working environment. Furthermore, the wide range of available “grades” ensures that you can dial in the precise retention efficiency required for your specific process fluid.
Key Benefits Summary:
- Scalability: Methods developed on laboratory-scale lenticular discs can be directly scaled to full production modules.
- Efficiency: Zeta potential enhances the capture of fine particles that mechanical straining alone would miss.
- Chemical Compatibility: Polypropylene components and various gasket options ensure compatibility with solvents, alcohols, and aqueous solutions.
Ready to upgrade your filtration process?
Purecowater is your trusted partner for ErtelAlsop filtration solutions. Whether you need sizing advice or replacement modules, our team is here to assist.