Introduction to ErtelAlsop Pak Lenticular Filters
For industrial applications requiring superior haze removal, high solids loading, and a leak-free environment, ErtelAlsop Pak Lenticular Filters stand out as the premier solution in depth filtration. As a distributor for top-tier filtration technologies, Purecowater is proud to offer these advanced modules to tackle complex liquid clarification challenges.
The ErtelAlsop Pak® cartridge—commonly referred to as a lenticular filter module—offers the filtration precision of plate and frame filter presses but packaged in a convenient, enclosed cartridge format. This design revolutionizes the workflow for industries ranging from pharmaceuticals to food and beverage, providing a cleaner, safer, and more efficient filtration process.
What is a Lenticular Filter?
A lenticular filter module consists of individual filter cells stacked vertically. Each cell is constructed from two discs of depth filter media sealed around the edges. When assembled, these cells resemble a stack of double convex lenses—hence the term “lenticular.”
Developed originally by Alsop Engineering in 1942, this format effectively solves the limitations of traditional plate and frame filters. By enclosing the media in a sealed housing, users eliminate the leakage and exposure risks associated with open presses, while also drastically reducing change-out times from hours to minutes.
Key Operating Principle: Depth Filtration
Unlike surface filters that trap particles only on the top layer, ErtelAlsop modules utilize depth filtration. The media matrix, often composed of cellulose, Diatomaceous Earth (DE), or Perlite, traps particles throughout the thickness of the pad. Additionally, the media is treated with a wet-strength resin to impart a Zeta Potential (electrokinetic charge), which attracts and holds sub-micron particles like haze and colloids that are smaller than the mechanical rating of the filter.
Technical Specifications
ErtelAlsop Pak modules are highly versatile, available in various chemistries and configurations to fit existing housings. Below are the standard specifications for the Micro-Media® and Alpha-Media® series generally used in these Paks.
| Feature | Specification Details |
|---|---|
| Filter Type | Depth Filter / Lenticular Module |
| Available Diameters | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Micron Ratings (Nominal) | 0.25 µm to 15 µm |
| Configuration | Flat Gasket or Double O-Ring (DOZT) |
| Core Material | Polypropylene |
| Gasket Material | EPDM (Standard), silicone, Viton, etc. |
| Media Types | Micro-Media®, Alpha-Media®, Micro-Clear® (Carbon) |
| Cell Count | Typically 5 to 16 cells per stack |
Performance Features
1. High Solids Loading Capacity
The complex matrix of fibers and filter aids allows the Pak module to hold a significant amount of contaminants before reaching terminal pressure. This makes them ideal for secondary filtration or polishing steps where incoming fluids have varying turbidity.
2. Zeta Potential for Haze Removal
One of the standout features of the ErtelAlsop line, particularly the Zeta-Pak®, is the positive electrokinetic charge. This is crucial for applications like botanical extraction or beverage filtration, where negatively charged contaminants (such as lipids, haze proteins, or fine particulates) need to be removed to achieve “sparkle” and clarity.
3. Totally Enclosed System
For applications involving volatile solvents, API (Active Pharmaceutical Ingredients), or strict sanitary requirements, the enclosed housing of a lenticular system prevents atmospheric contact. This ensures operator safety and product sterility downstream.
Applications by Industry
The versatility of the Pak Lenticular Filter allows it to serve a wide array of industrial sectors. Whether clarifying chemical solvents or polishing high-end spirits, there is a media grade available.
| Industry | Primary Application | Benefit |
|---|---|---|
| Food & Beverage | Wine, Beer, Spirits, Cider, Corn Syrup | Haze removal, taste/odor neutrality, shelf stability. |
| Botanical Extracts | Hemp/Cannabis Oil, Essential Oils | Lipid/Wax removal (Winterization), decolorization. |
| Pharmaceuticals | API, Antibiotics, Cough Syrups | Sterile pre-filtration, particulate removal in sterile loops. |
| Chemicals | Solvents, Silicone, Resins, Inks | Clarification of viscous fluids, catalyst recovery. |
| Electric Utility | Transformer Oils (AquaKv-Pak®) | Removal of water, carbon, and sludge from insulating oils. |
Why Choose ErtelAlsop Pak Modules?
- Scalability: With over 300 media grades available, you can scale from a lab-size capsule to a full 16-inch multi-stack housing seamlessly.
- Compatibility: Available in Flat Gasket and Double O-Ring configurations, these modules fit most standard industrial lenticular housings.
- Efficiency: The graded density of the depth media ensures that larger particles are trapped on the surface while finer particles are captured internally, maximizing throughput.
Contact Purecowater for Filtration Solutions
Choosing the correct micron rating and media composition (Cellulose, DE, Carbon) is critical for your process efficiency. Purecowater specializes in diagnosing solid-liquid separation issues and supplying the exact ErtelAlsop configuration your system requires.
For inventory inquiries, sizing assistance, or to order ErtelAlsop Pak Filters: