Introduction to ErtelAlsop Pak® Lenticular Filters
At Purecowater, we specialize in solving complex solid and liquid filtration challenges. Among our premier offerings are the ErtelAlsop Pak® Lenticular Filters, a sophisticated depth filtration solution designed to replace traditional plate and frame filters while enhancing particulate retention and ease of use.
The Zeta-Pak® and other Pak® configurations are industry workhorses, utilizing a stacked disc design that combines the superior filtration physics of depth media with the convenience of a cartridge format. Whether you are clarifying botanical extracts, distilling spirits, or protecting downstream reverse osmosis units, these filters offer a scalable and leak-free solution.
How It Works: The Science of Depth Filtration
Unlike surface filters that simply sieve particles based on pore size, ErtelAlsop Pak® modules utilize depth filtration. The media consists of a complex matrix of cellulose fibers, often impregnated with filter aids like Diatomaceous Earth (DE) or Perlite. This structure creates a tortuous path for fluid, trapping contaminants throughout the thickness of the media rather than just on the surface.
The Power of Zeta Potential
A defining feature of the Zeta-Pak® series is its Zeta Potential. The filter media is chemically modified to hold a positive electrokinetic charge. This allows the filter to attract and adsorb negatively charged particles—such as haze-forming proteins, bacteria, and endotoxins—that are often smaller than the physical pore rating of the filter media [clearsolutionscorp.com].
Key Features and Benefits
- High Solids Loading: The depth media structure absorbs more contaminants before fouling, extending service life.
- Leak-Free Design: Unlike plate and frame presses which can drip, the Pak® modules are sealed within a housing. The cells themselves use a patented edge-seal process using polypropylene to prevent bypass.
- User-Friendly Changeouts: Swapping out a lenticular module takes a fraction of the time required to service a filter press, reducing downtime and labor costs [gwkent.com].
- Versatile Media Options: Available with Micro-Media® (cellulose/DE/Perlite) for high efficiency or Micro-Clear® for specific applications.
Technical Specifications
Understanding the compatibility and sizing of your filter is crucial for system integration. Below are the standard specifications for the ErtelAlsop Pak® series tailored for applications ranging from pharmaceutical processing to food and beverage production.
| Specification | Details |
|---|---|
| Micron Ratings | 0.25 µm – 15 µm (Nominal) |
| Module Diameters | 12-inch and 16-inch |
| Standard Cell Count | 16 cells (custom configurations available, e.g., 5-18 cells) |
| End Cap Configurations | Flat Gasket, Double O-Ring (222/226 style) |
| Gasket Material | EPDM (Standard), others available upon request |
| Core Material | Polypropylene |
| Media Type | Cellulose, with DE or Perlite filter aids |
| Flow Rates | High flow capability dependent on micron rating and viscosity |
Primary Applications
The versatility of the Pak® Lenticular Filter makes it suitable for a wide array of industries. By leveraging different grades of media, these filters can tackle specific contaminants effectively.
1. Botanical Extracts & Hemp
In the extraction industry, removing waxes, lipids, and fine particulates is critical. The Pak® filters with DE are particularly effective here, as the large surface area maintains flow rate while the filter aid adsorbs lipid components without stripping desirable compounds [clearsolutionscorp.com].
2. Food & Beverage
For distilled spirits, wine, and beer, these filters provide excellent haze removal and polishing. They ensure product clarity and stability without affecting odor or taste.
3. Life Sciences & Pharmaceuticals
Used for the reduction of endotoxins and bio-burden, serving as an excellent pre-filter to protect expensive downstream membrane filters.
Why Choose ErtelAlsop Modules from Purecowater?
Purecowater provides not just the product, but the technical expertise to ensure it fits your process. The ErtelAlsop Pak® design dates back to 1942, representing decades of refinement in depth filtration technology. Whether you need a Double O-Ring seal for critical hygiene or a standard Flat Gasket for general use, we can guide you to the correct configuration.
If you are experiencing low flow rates, high turbidity, or frequent changeouts with your current system, upgrading to a value-added lenticular solution may be the answer.
Ready to optimize your filtration process?
Contact our team of experts to discuss sizing, micron ratings, and compatibility for your specific application.