Introduction to ErtelAlsop Pak® Lenticular Filters
For industries requiring high-performance depth filtration without the maintenance complexity of traditional plate and frame presses, the ErtelAlsop Pak® Lenticular Filters offer a superior solution. As a versatile depth filter cartridge, these modules are designed to tackle solid and liquid filtration problems across pharmaceutical, chemical, food and beverage, and utility sectors. Purecowater is proud to supply these advanced filtration solutions to help optimize your process.
The **Pak® depth filter cartridges** (also known as lenticular modules) combine the proven efficiency of depth filter media with the convenience of a totally enclosed, disposable cartridge format. This design minimizes leakage and exposure, making it an ideal upgrade for critical applications [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
Technology and Design
The “Lenticular” design gets its name from the shape of the stacked filter cells, which resemble double convex lenses. Each module is constructed from multiple filter cells—typically ranging from 5 to 18 cells per stack—assembled into a single unit.
Key design features include:
- Sealed Edges: Each pair of filter media sheets is sealed using a patented process with polypropylene, ensuring structural integrity and preventing bypass.
- Core Construction: A heavy-duty polypropylene core supports the stacked cells, compatible with various solvent types and operating conditions.
- Scalability: Available in industry-standard 12-inch (30.5 cm) and 16-inch (40.6 cm) diameters, allowing for scalable throughput [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/).
Media Configurations and Series
ErtelAlsop Pak® cartridges are available with a variety of media compositions to suit specific viscosity and retention requirements. Whether you strictly need particulate removal or adsorption capabilities, there is a Pak® formulation for the job.
| Series Name | Primary Application | Key Media Characteristics |
|---|---|---|
| Zeta-Pak® | General Purpose / Pharma / Biotech | The “workhorse” of the line. Contains cellulose and filter aids (DE) for high zeta potential and fine particle retention [store.clearsolutionscorp.com](https://store.clearsolutionscorp.com/products/pak-lenticular-filter). |
| Disc-Pak® | Dielectric Oils / Viscous Fluids / Food | 100% Cellulose (AlphaMedia). Ideal for oils, syrups, and perfumes where DE or perlite is restricted [clearsolutionscorp.com](https://www.clearsolutionscorp.com/product/disc-pak-lenticular-filter). |
| AquaKv-Pak® | Electric Utility / Transformer Oil | Specifically formulated for water and moisture removal from dielectric fluids [ertelalsop.com](https://ertelalsop.com/category/filter-media/filter-module/). |
| Bio-Pak® | Pharmaceutical / Biologicals | Designed for critical biological applications requiring low extractables. |
Technical Specifications
Understanding the specifications is crucial for selecting the right cartridge for your housing and process flow.
| Nominal Micron Ratings | 0.25 µm to 15 µm [ertelalsop.com](https://ertelalsop.com/lenticular-pak-cartridges/) |
| Diameters | 12-inch or 16-inch |
| End Cap Configurations | Flat Gasket or Double O-Ring |
| Gasket Materials | EPDM, Silicone, Viton, etc. |
| Stack Sizes | 5 to 18 Cells per Module |
| Core Material | Polypropylene (Standard) |
Why Choose Pak® Lenticular Filters?
High Solids Loading & Efficiency
The complex matrix of fibers and particles in ErtelAlsop’s depth media allows for a high solids loading capacity. Unlike surface filters that clog quickly, these depth filters trap particles throughout the media thickness. This is particularly effective for botanical extracts and hazy liquids where waxes and lipids must be removed without stripping flavor [store.clearsolutionscorp.com](https://store.clearsolutionscorp.com/products/pak-lenticular-filter).
Operator Safety & Ease of Use
Transitioning from a plate and frame press to a lenticular housing significantly utilizes the enclosed nature of the Pak® system. It prevents exposure to process fluids and eliminates the leakage often associated with filter presses. Change-outs are rapid—often taking minutes rather than hours—reducing downtime and labor costs [ertelalsop.com](https://ertelalsop.com/depth-filtration-equipment/lenticular-filter-housings/).
Applications
These filters are widely used across diverse industries due to their adaptability:
- Food & Beverage: Polishing syrups, spirits, and wines; removal of haze.
- Pharmaceuticals: Clarification of cell cultures and active pharmaceutical ingredients (APIs).
- Utility & Power Generation: Reconditioning of insulating oils in transformers and circuit breakers (AquaKv-Pak®) [ertelalsop.com](https://ertelalsop.com/category/filter-media/filter-module/).
- Chemicals: Filtration of solvents, silicone production, and inks.
For more information on sizing, compatibility, and ordering ErtelAlsop Pak® Lenticular Filters for your facility, please contact our engineering team.