Advanced Depth Filtration with ErtelAlsop Pak® Technology
For industries requiring high-purity liquid filtration, the ErtelAlsop Pak® Lenticular Filter represents a significant evolution in depth filtration technology. Available through Purecowater, these lenticular cartridges (also known as modules) offer a superior alternative to traditional plate and frame filters, providing a totally enclosed, sanitary, and easy-to-handle solution for complex filtration challenges.
Whether you are processing pharmaceuticals, distilled spirits, cosmetics, or industrial fluids, the Pak® design combines precision particle retention with high solids loading capacity.
What is a Lenticular Filter?
The “Lenticular” design refers to a stack of depth filter cells that resemble double convex lenses. The ErtelAlsop Pak® is assembled from varying numbers of these cells—typically ranging from 5 to 16 stacked units—bonded together to form a single, robust cartridge.
Each cell consists of a pair of depth filter media sheets (such as MicroMedia®, AlphaMedia®, or MicroClear®) with edges sealed continuously using a patented polypropylene process. This construction eliminates the leakage often associated with loose filter sheets and allows for installation inside a sealed housing.
Key Benefits Over Plate & Frame Filters
While plate and frame filters have been the standard for decades, the Lenticular Pak® offers distinct advantages for modern manufacturing:
- Enclosed System: Prevents exposure to the atmosphere and eliminates leakage/dripping, crucial for toxic, hazardous, or high-value fluids.
- Quick Change-Outs: Replacing a module takes a fraction of the time required to strip and dress a plate and frame press.
- Scalability: Available in 12-inch and 16-inch diameters to fit various housing sizes.
- Structural Integrity: The polypropylene core and supports ensure the cartridge withstands pressure differentials without collapsing.
Media Technologies and Configurations
ErtelAlsop offers a variety of media compositions to target specific contaminants. The filtration mechanism relies on a complex matrix of fibers that trap particles not just on the surface, but throughout the depth of the media.
Zeta-Pak® (The Workhorse)
The Zeta-Pak® incorporates Zeta Potential—an electrokinetic charge that attracts and holds ultra-fine particles smaller than the mechanical pore size of the media. This is ideal for removing haze, bacteria, and endotoxins.
Disc-Pak®
Constructed with 100% cellulose AlphaMedia®, Disc-Pak is perfect for applications where Diatomaceous Earth (DE) or Perlite cannot be used, such as dielectric oils or certain pharmaceutical grades.
Technical Specifications
When selecting a Pak® cartridge, compatibility and micron rating are paramount. Below is a summary of the standard specifications available via Purecowater.
| Feature | Specification Details |
|---|---|
| Diameters | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| End Configurations | Flat Gasket or Double O-Ring |
| Cell Count | Typically 5 to 16 cells per module |
| Core Material | Polypropylene (Standard) |
| Gasket Materials | EPDM, Silicone, Viton, Buna-N |
| Media Types | Cellulose, Diatomaceous Earth (DE), Perlite, Carbon |
Common Applications
The versatility of the Pak® line makes it a staple across several sectors:
- Food & Beverage: Polishing filtration for syrups, distilled spirits, wine, and beer. Removes haze and yeast.
- Pharmaceuticals: Active pharmaceutical ingredients (API) purification, removal of carbon fines, and lipid removal in botanical extracts.
- Chemicals: Clarification of solvents, inks, paints, and resins.
- Utilities: Filtration of dielectric oils for transformers and turbines.
- Cosmetics: Clarification of perfumes, lotions, and essential oils.
Housing Compatibility
The ErtelAlsop Pak® cartridges are designed to fit into standard lenticular housings. ErtelAlsop housings utilize a “Lock and Load” system for horizontal or vertical mounting, simplifying the loading process. The cartridges are available with Flat Gasket ends (standard) or Double O-Ring ends (for critical sealing).
Ready to upgrade your filtration process?
Purecowater can assist you in selecting the correct media grade, micron rating, and gasket configuration for your specific application. We offer comprehensive support for ErtelAlsop products and compatible housings.
Contact Purecowater for Pricing & Support
References:
ertelalsop.com – Lenticular Pak® Cartridges
clearsolutionscorp.com – Pak Lenticular Filter Specifications