Introduction to ErtelAlsop Pak® Lenticular Filters
In the world of industrial liquid filtration, efficiency and scalability are paramount. ErtelAlsop Pak® Lenticular Filters (also known as lenticular cartridges or modules) represent a significant evolution from traditional plate and frame filtration. Designed to combine the strengths of depth filtration media with the convenience of an enclosed cartridge system, these filters are a top choice for applications ranging from pharmaceutical processing to food and beverage production.
At Purecowater, we understand the critical nature of solid-liquid separation. As a distributor for top-tier filtration solutions, we are proud to feature ErtelAlsop’s technology, which offers distinct advantages in handling high solids loading and ensuring product purity. This guide explores the specifications, operational benefits, and applications of the Pak® Lenticular series.
What Are Lenticular Filters?
The term “lenticular” refers to the shape of the filter cells. These cartridges are constructed from stacked discs that resemble double convex lenses. Each cell is essentially a pair of depth filter sheets (MicroMedia®, AlphaMedia®, or MicroClear®) sealed at the edges.
This design creates a complex matrix of fibers and particles that maximizes surface area within a compact footprint. Fluid flows from the outside of the cartridge, through the media, and into the center core, effectively trapping particulates within the depth of the media matrix rather than just on the surface.
Key Advantages Over Plate & Frame Filters
While plate and frame filters have been the industry standard for decades, Lenticular Pak® cartridges offer modern solutions to old problems:
- Totally Enclosed System: Prevents fluid loss and protects the product from external contamination.
- Rapid Change-Out: Swapping a cartridge takes a fraction of the time required to dress a plate and frame press, significantly reducing downtime.
- Leak-Free Design: Available options like the Bio-Pak® Double O-Ring virtually eliminate bypass and leakage naturally associated with flat gasket compression.
- Scalability: Available in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells) to match batch sizes from lab to full-scale production.
Filter Media Technologies
ErtelAlsop leverages several proprietary media formulations to target specific contaminants. Choosing the right media is crucial for optimizing flow rates and retention.
| Media Type | Composition | Primary Applications |
|---|---|---|
| AlphaMedia™ | 100% Cellulose | Liquid filtration where no DE or perlite is desired. Ideal for dielectric oils, perfumes, and maintaining active ingredients in syrups. |
| MicroMedia® | Cellulose + Filter Aid (DE/Perlite) | High efficiency particle retention with high zeta potential. Excellent for haze removal in spirits and botanical extracts. |
| MicroClear® | Immobilized Activated Carbon | Adsorption of colors, odors, and off-tastes without the mess of loose bulk carbon. |
For detailed sourcing on these media types, refer to the manufacturer data [ertelalsop.com].
Technical Specifications
Below are the general specifications for the Pak® Lenticular Cartridges available through Purecowater.
| Micron Ratings | Nominal 0.25 to 15 microns |
| Diameters | 12 inch (30.5 cm) 16 inch (40.6 cm) |
| Core Material | Polypropylene (Standard) or Stainless Steel options |
| Gasket Materials | EPDM, Silicone, Viton, Buna-N |
| End Cap Configurations | Flat Gasket (Traditional) Double O-Ring (Bio-Pak® / Sanitary) |
| Typical Surface Area | Varies by cell count; 16-cell modules optimize flow vs. capacity. |
Common Applications
Pharmaceutical & Biotech
The Bio-Pak® line is specifically designed for this sector. With a double O-ring design and a plugged-in center core, it ensures positive sealing and eliminates the need for a stainless steel center post, which can be a source of contamination. This design is critical for processing high-value biopharmaceuticals [ertelalsop.com].
Distilled Spirits & Botanical Extracts
Lenticular filters are the “workhorse” for haze removal and polishing. The MicroMedia® series, which incorporates Diatomaceous Earth (DE), forms a rigid cake that sieves out lipids and waxes without stripping desired flavors. This is essential for botanical extracts where high flow rates and lipid removal are required simultaneously [clearsolutionscorp.com].
Industrial & Chemical
For more rugged applications, the Disc-Pak® utilizing AlphaMedia (cellulose) is favored. It handles medium viscosity fluids like lubricating oils, coolants, and resins. The depth filtration mechanism effectively protects downstream equipment by holding high loads of solids [clearsolutionscorp.com].
Integration with Filter Housings
To operate these cartridges, a dedicated lenticular filter housing is required. These housings come in vertical or horizontal orientations and can be specified for sanitary (highly polished, tri-clamp fittings) or industrial (industrial finishes, flanged fittings) use. The enclosed design of the housing allows for safer handling of hazardous chemicals and simplified steam-in-place (SIP) procedures.
Why Partner with Purecowater?
As an OEM and Distributor, Purecowater provides more than just the cartridge. We assist in sizing the housing, selecting the correct media grade, and troubleshooting your current filtration bottlenecks. Whether you are filtering ultrapure water or heavy industrial fluids, we have the expertise to integrate Veolia, WTS, and ErtelAlsop technologies into a seamless process.
Need help selecting the right micron rating or media type for your application?