At Purecowater, we specialize in providing top-tier engineered solutions for solid and liquid filtration. Among our premier offerings are the ErtelAlsop Pak® Lenticular Filters. These depth filtration modules represent a significant evolution in industrial filtration, combining the efficiency of traditional plate and frame technology with the convenience and hygiene of a totally enclosed modular design.
What is a Lenticular Filter?
The lenticular filter module, often referred to as a “Pak,” was originally invented by Alsop Engineering in the 1940s. It revolutionized depth filtration by stacking filter discs inside a sealed housing. Today, ErtelAlsop continues to innovate this format, providing a versatile solution that is ideal for applications requiring high retention efficiencies and flow rates.
Unlike surface filters that trap particles only on the outer layer, Pak Lenticular Filters utilize depth filtration. The modules are constructed from Micro-Media® containing cellulose and filter aids like Diatomaceous Earth (DE). This structure creates a tortuous path for fluids, allowing for the entrapment of ultra-fine particles, removal of haze, and reduction of bio-burden via electrokinetic adsorption (zeta potential) [clearsolutionscorp.com].
Key Features and Benefits
For facilities looking to upgrade from messy plate and frame presses or standard cartridges, the ErtelAlsop Pak series offers distinct operational advantages:
- Totally Enclosed System: The sealed housing prevents leakage and protects the product from external contamination, making it ideal for sanitary applications in pharmaceuticals and food & beverage [ertelalsop.com].
- Scalability: Since the modules use the same media as ErtelAlsop’s filter sheets, processes can easily be scaled from lab testing to full production.
- Quick Change-Out: The modular design allows for rapid installation and removal, significantly reducing downtime compared to redressing a plate and frame filter.
- High Retention: Pre-impregnated with DE, these filters form a rigid, porous cake that effectively sieves out particulate matter without affecting the odor or taste of the liquid.
Zeta-Pak®: The Industry Workhorse
One of the most popular configurations we distribute is the Zeta-Pak®. This lenticular module is known for its superior retention efficiencies and robust construction. It is particularly effective for botanical extract filtration, where the large surface area allows for high flow rates while efficiently removing waxes and lipids [clearsolutionscorp.com].
Technical Specifications
Below is a breakdown of the standard specifications for ErtelAlsop Pak Lenticular Filters.
| Feature | Specification Details |
|---|---|
| Micron Ratings | Nominal ratings available including 1.0 µm, 2.5 µm, and 5.0 µm |
| Filter Media | Cellulose impregnated with Diatomaceous Earth (DE) or Perlite |
| Module Diameters | 12-inch and 16-inch standard sizes |
| End Configurations | Flat Gasket or Double O-Ring |
| Core Material | Polypropylene |
| Gasket Material | EPDM (standard), compatible with various solvents |
| Cell Count | Typically 16 cells per module |
Applications
The versatility of the Pak Lenticular design makes it suitable for a wide range of industries. Whether you are filtering distilled spirits or polishing pharmaceutical water, these modules ensure product integrity.
- Botanical Extracts: Excellent for lipid and wax removal in solvent-based extractions.
- Food & Beverage: Used for haze removal in juices, syrups, and beer.
- Distilled Spirits: Ensures clarity and stability in final products.
- Cosmetics: Purification of oils and lotions.
- Chemicals & Utilities: Filtration of dielectric oils and bulk chemicals [ertelalsop.com].
Housing Options
To complement the filter modules, we offer a variety of Lenticular Filter Housings available in vertical or horizontal orientations. The horizontal design, in particular, allows for ergonomic loading and unloading at waist height, eliminating the need for overhead hoists and reducing labor requirements [ertelalsop.com].
Ready to Optimize Your Filtration Process?
Purecowater is your trusted partner for ErtelAlsop filtration solutions. If you need assistance selecting the right micron rating, media type, or housing configuration for your specific application, our engineering team is here to help.