For facilities seeking a scalable, leak-free alternative to traditional plate and frame separation, ErtelAlsop Pak® Lenticular Filters represent the gold standard in depth filtration technology. As a distributor and OEM for premium filtration solutions, Purecowater provides these versatile modules to tackle rigorous solid-liquid separation challenges.
The Lenticular Pak® cartridge design marries the filtration efficiency of depth media with the convenience of a cartridge system. This article explores the specifications, media configurations, and operational benefits of integrating ErtelAlsop Pak® modules into your process line.
What is a Lenticular Pak® Filter?
Originally developed by ErtelAlsop, the Lenticular Pak® serves as an enclosed depth filtration system. Unlike flat sheet filters that are exposed to the environment, lenticular modules are stacked inside a sealed housing. This design eliminates edge leakage and external contamination, making it ideal for pharmaceutical, cosmetic, and food-grade applications.
The cartridge consists of stacked “cells”—individual lenses of depth filter media sealed together. These cells are assembled onto a rigid polypropylene core. The fluid path forces liquid through the media matrix, where particles are trapped by both mechanical sieving and electrokinetic adsorption (Zeta potential).
Key Features and Benefits
- Enclosed System: Prevents product loss and protects operators from exposure to hazardous fluids or fumes.
- High Solids Loading: The depth media matrix can hold a significant amount of particulate before requiring changeout, superior to surface filtration.
- Scalability: Modules are available in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells) to match flow rate requirements.
- Zeta Potential: many Pak® formulations utilize positively charged resins to attract negatively charged contaminants like haze, bacteria, and endotoxins.
- Rapid Changeout: Replacing a module takes a fraction of the time required to dress a plate and frame press.
Product Specifications
ErtelAlsop Pak® cartridges are highly customizable. Below are the standard specifications available through Purecowater.
| Feature | Specification |
|---|---|
| Diameters | 12-inch (30.5 cm) and 16-inch (40.6 cm) |
| Micron Ratings | 0.25 to 15 Microns (Nominal) |
| Cell Counts | 5 to 18 cells per module |
| Core Material | Polypropylene (Standard) |
| Gasket Options | Flat Gasket or Double O-Ring |
| Surface Area (12″) | Up to 1.8 m² (depending on cell count) |
Media Configurations: Zeta-Pak® vs. Disc-Pak®
Choosing the right media is crucial for optimizing your filtration process. Purecowater offers the full range of ErtelAlsop media formulations:
1. Zeta-Pak® (MicroMedia®)
The Zeta-Pak® is the industry workhorse. It incorporates cellulose, filter aids (Diatomaceous Earth or Perlite), and a wet-strength resin. This combination creates a strong positive Zeta potential, making it highly effective for removing haze and ultra-fine particles in beverages and biopharmaceuticals.
2. Disc-Pak® (AlphaMedia®)
The Disc-Pak® utilizes 100% cellulose media with no inorganic filter aids. This is the preferred choice for applications where mineral extractables (like DE) must be avoided. It is commonly used for dielectric oils, transformer oils, and delicate fragrances.
Common Applications
The versatility of the Pak® system makes it suitable for a wide array of markets. See where these modules excel:
| Industry | Target Applications |
|---|---|
| Food & Beverage | Distilled spirits, wines, syrups, cider, and soft drinks. |
| Pharmaceuticals | API purification, broth clarification, and large volume parenterals. |
| Botanical Extracts | Removal of waxes and lipids (dewaxing) using Zeta-Pak® media. |
| Chemical & Industrial | Clarification of lubricating oils, coolants, and chemicals. |
| Cosmetics | Perfumes, fragrances, and essential oils. |
Contact Purecowater for Sizing and Pricing
Whether you are replacing existing modules or engineering a new enclosed filtration skid, Purecowater engineering experts are ready to assist. We can help you determine the correct micron rating, media type, and housing configuration for your specific stream.