Introduction to ErtelAlsop Pak® Lenticular Filters
In the world of industrial liquid filtration, the transition from open systems to enclosed, sanitary, and efficient solutions is critical for many manufacturers. ErtelAlsop Pak® Lenticular Filters represent a premier solution in depth filtration, offering the high solids-loading capacity of traditional plate and frame filters packaged in a user-friendly, sealed cartridge format. Available through Purecowater, these modules are designed to tackle complex filtration challenges across pharmaceutical, food and beverage, and chemical industries.
The Pak® cartridges are often referred to as lenticular filter modules. They consist of depth filter media sheets comprised of cellulose fibers, varying filter aids (such as Diatomaceous Earth), or activated carbon. These sheets are sealed together to form a stack of “cells” that resemble double convex lenses, creating a high surface area within a compact footprint [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
How Lenticular Filtration Works
Unlike surface filtration, which catches particles only on the top layer, depth filtration traps particulates throughout the thickness of the media matrix. The ErtelAlsop Pak® utilizes a tortuous path for the liquid, ensuring high retention efficiency and the ability to hold a significant amount of solids before needing replacement.
The modules are constructed by creating individual cells from pairs of die-cut media sheets. The edges are sealed—often using a patented polypropylene process—to prevent bypass. These cells are then stacked on a central core. This design directs liquid flow from the outside of the cartridge, through the media, and into the central core, ensuring that all fluid is treated effectively [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
Key Features and Benefits
- Enclosed System: Unlike plate and frame filters, lenticular modules operate inside a sealed housing. This prevents leakage, reduces exposure to the product, and creates a cleaner, safer work environment.
- High Solids Loading: The depth media structure allows for substantial contaminant holding capacity, leading to longer service life and reduced downtime.
- Scalability: With sizes available in 12-inch and 16-inch diameters and various cell counts (5 to 18 cells), systems can be scaled from pilot lab testing to full production [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
- Versatile Configurations: Modules are available with Flat Gasket or Double O-Ring end caps to fit a wide variety of housings options.
Comparison: Plate & Frame vs. Lenticular Pak®
| Feature | Plate & Frame Filter | ErtelAlsop Pak® Lenticular |
|---|---|---|
| System Design | Open (potential for drip/leakage) | Totally Enclosed (Sanitary) |
| Change-out Time | High (Labor intensive) | Low (Quick cartridge swap) |
| Media Utilization | Sheets | Stacked Modules (Same media specs) |
| Footprint | Large, heavy equipment | Compact vertical or horizontal housings |
Product Specifications
The ErtelAlsop Pak® line is highly customizable to meet specific process requirements. Below are the general specifications for the standard industrial and sanitary modules.
| Specification | Details |
|---|---|
| Micron Ratings | Nominal retentions from 0.25 µm to 15 µm [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/) |
| Module Diameters | 12-inch (30.5 cm) and 16-inch (40.6 cm) |
| Standard Cell Counts | Up to 16 cells (standard), ranging 5-18 cells depending on configuration [store.clearsolutionscorp.com](https://store.clearsolutionscorp.com/products/pak-lenticular-filter) |
| Gasket Material | EPDM (Standard), others available upon request |
| Core Material | Polypropylene |
| End Cap Configurations | Flat Gasket, Double O-Ring (e.g., Code 8 styling for sanitary fits) |
Available Media Formulations
The versatility of the Pak® cartridge lies in the wide range of available media grades:
- MicroMedia®: Incorporates cellulose not only with filter aids but also resin, providing excellent wet strength and zeta potential for capturing ultra-fine particles and haze. Ideal for pharmaceutical and botanical extracts [store.clearsolutionscorp.com](https://store.clearsolutionscorp.com/products/pak-lenticular-filter).
- AlphaMedia®: A pure cellulose media generally used for clarifying applications where no filter aids are required.
- MicroClear®: Contain activated carbon for adsorption applications, such as color or odor removal, without the mess of handling loose carbon powder [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
Common Applications
Due to their enclosed design and range of media grades, ErtelAlsop Pak® cartridges are utilized in diverse sectors:
- Botanical Extracts: Removal of waxes and lipids using Diatomaceous Earth (DE) impregnated media [store.clearsolutionscorp.com](https://store.clearsolutionscorp.com/products/pak-lenticular-filter).
- Food & Beverage: Polishing filtration for distilled spirits, syrups, and beverages to ensure clarity and stability.
- Pharmaceuticals: Clarification of cell cultures and removal of precipitates in API production.
- Cosmetics: Filtration of fragrances, essential oils, and lotions.
- Chemicals: Removal of carbon fines or catalyst recovery.
Housings and System Integration
Purecowater can supply ErtelAlsop Pak® cartridges as well as the necessary stainless steel housings. Options include vertical housings for standard footprints or the “Lock and Load” horizontal housings that allow for easier cartridge installation at waist height [ertelalsop.com](https://ertelalsop.com/depth-filtration-equipment/lenticular-filter-housings/horizontal-filter-housing/).
Need assistance selecting the right micron rating or media grade?
Our team at Purecowater specializes in solving complex solid and liquid filtration problems. Whether you need a replacement module or a completely new filtration skid, we are here to help.