Optimizing Solid-Liquid Separation with ErtelAlsop Pak® Technology
In the complex world of industrial filtration, obtaining high solids loading capacity without sacrificing throughput is a constant challenge. ErtelAlsop Pak® Lenticular Filters answer this challenge by combining the precision of depth filtration media with the convenience of a modular cartridge design. Whether you are in the pharmaceutical, chemical, or food and beverage industry, these lenticular modules offer a sealed, hygienic, and efficient alternative to traditional plate and frame filter presses.
At Purecowater, we distribute top-tier filtration technologies, including the ErtelAlsop Pak® series, to help you tackle your most difficult separation problems.
What is a Lenticular Filter?
Lenticular filtration technology, originally invented by Alsop Engineering, bridges the gap between sheet filtration and cartridge filtration. A “Pak” consists of multiple filter cells stacked vertically. Each cell is formed by a pair of depth filter sheets (such as MicroMedia® or AlphaMedia®) sealed at the edges using a patented polypropylene process.
The resulting module resembles a stack of double convex lenses—hence the term "lenticular." This design maximizes surface area within a compact footprint, allowing for high flow rates and exceptional particle retention ranging from 0.25 to 15 microns. Unlike open plate and frame systems, these cartridges fit inside totally enclosed housings, preventing leakage and ensuring a sanitary environment for sensitive applications ertelalsop.com.
Key Benefits
- Enclosed System: Eliminates leakage and external contamination, crucial for pharmaceutical and hazardous chemical applications.
- High Solids Loading: The depth media matrix traps particles throughout its thickness, not just on the surface.
- Rapid Change-out: Modules can be replaced in minutes compared to the hours required for plate and frame presses.
- Scalability: Available in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells) to match process volumes.
Technical Specifications
ErtelAlsop Pak® cartridges are designed to retrofit into most standard lenticular housings. Below are the standard specifications for helping you select the right configuration for your process.
| Feature | Specification |
|---|---|
| Module Diameters | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Number of Cells | 5 to 18 stacked cells per module |
| Micron Retention | 0.25 to 15 microns (Nominal) |
| Gasket Configurations | Flat Gasket or Double O-Ring (Plug-in) |
| Core Material | Polypropylene (Standard) |
| Media Types | Cellulose, DE (Diatomaceous Earth), Perlite, Carbon, Wet Strength Resin |
Product Variations and Applications
Not all depth filtration needs are the same. ErtelAlsop offers specialized Pak® configurations tailored to specific industries.
1. Bio-Pak® (Pharmaceutical Grade)
Designed for critical pharmaceutical, biotech, and cosmetic applications, the Bio-Pak® features a Double O-Ring design and a rigid polypropylene core. It contains no stainless steel straps, eliminating potential metallic contamination. This format ensures positive sealing and integrity, making it ideal for the filtration of high-purity injectables and biologicals ertelalsop.com.
2. Zeta-Pak® (Industrial & Botanical)
The Zeta-Pak® incorporates filter aids like Diatomaceous Earth (DE) or Perlite within the cellulose matrix. It is known for its positive zeta potential, which electrokinetically attracts negatively charged contaminants like bacteria and fine haze. It is widely used in:
- Botanical Extracts: Efficient removal of waxes and lipids while maintaining high flow rates clearsolutionscorp.com.
- Chemical Processing: Clarifying oils, solvents, and paints.
- Food & Beverage: Haze removal in spirits, syrups, and flavorings.
3. Carbon-Pak®
For applications requiring adsorption, such as color or odor removal, these modules incorporate activated carbon directly into the filter sheet, eliminating the mess of loose carbon powder.
Pak® Cartridges vs. Plate and Frame Filters
While both technologies utilize depth filter sheets, lenticular cartridges offer significant operational advantages.
| Comparision | Lenticular Pak® Modules | Plate & Frame Press |
|---|---|---|
| Containment | Totatlly enclosed housing; no leakage | Open design; prone to drip/leakage |
| Change-out Time | Fast (15-30 mins); low labor | Slow (Hours); high labor intensity |
| Hygiene | High; easy to CIP/Steam | Difficult to clean thoroughly |
| Footprint | Compact vertical footprint | Large horizontal footprint |
Ready to Upgrade Your Filtration System?
Purecowater provides a comprehensive range of ErtelAlsop housings and Pak® modules to suit industrial, sanitary, and utility applications. Whether you need to replace existing media or engineer a new filtration skid, our team is ready to assist.