Introduction to Lenticular Filtration
For industrial and sanitary liquid processing, the transition from traditional plate and frame filters to modular systems is a significant upgrade in efficiency and safety. ErtelAlsop Pak® Lenticular Filters represent the pinnacle of this technology, offering a totally enclosed, scalable depth filtration solution.
These lenticular cartridges (also known as modules) are designed to function as a direct alternative to flat sheet filtration. By stacking filtration cells into a cohesive unit, the Pak® system provides the high solids loading capacity of depth media with the ease of handling typical of cartridge filters. Purecowater, as a distributor for top-tier filtration engineers, offers these robust solutions to tackle complex solid and liquid separation challenges.
How Lenticular Filters Work
The term “lenticular” refers to the shape of the filter cells. Each module is constructed from multiple stacked cells—typically ranging from 5 to 18 cells per cartridge. A single cell consists of a pair of depth filter sheets (such as MicroMedia® or AlphaMedia®) with their edges sealed using a patented polypropylene process.
This design resembles a stack of double convex lenses. Fluid flows from the outside of the module, passes through the depth media where particulates are retained, and exits through the center core. This distinct flow path allows for:
- High Solids Loading: The complex matrix of fibers captures particles throughout the media thickness, not just on the surface.
- Leak-Free Operation: The enclosed housing prevents leakage and exposure, a common issue with older plate and frame presses.
- Rapid Change-Outs: Modules can be replaced in a fraction of the time required to dress a plate and frame filter.
Product Specifications and Options
ErtelAlsop offers a versatile range of configurations to ensure compatibility with existing process equipment and specific filtration goals. Below are the core specifications for the Pak® cartridges.
| Feature | Specification Details |
|---|---|
| Diameters Available | 12 inch (30.5 cm) and 16 inch (40.6 cm) |
| Micron Ratings | Nominal retention from 0.25 µm to 15 µm |
| Seal Configurations | Flat Gasket or Double O-Ring (Plug-in) |
| Filter Media Options | Cellulose, Perlite, Diatomaceous Earth (DE), Activated Carbon |
| Gasket Materials | EPDM, Buna-N, Viton, Silicone |
| Core Material | Polypropylene or Stainless Steel (depending on model) |
Key Series and Variations
Different applications require different media compositions. ErtelAlsop has developed specific series to address these needs:
Zeta-Pak® (The Workhorse)
The Zeta-Pak® is the standard for general industrial and pharmaceutical applications. It utilizes Micro-Media® containing cellulose and filter aids like Diatomaceous Earth (DE). It effectively sieves out particulate matter while maintaining a high positive zeta potential, which attracts negatively charged contaminants like haze and ultra-fine particles.
Bio-Pak® (Pharmaceutical Grade)
Designed for critical applications, the Bio-Pak® features a highly sanitary design. Unlike standard flat gasket models, the Bio-Pak uses a Double O-Ring connection. This ensures a positive seal between cartridges and the housing housing, eliminating bypass. It is constructed without stainless steel straps, using a rigid polypropylene core to ensure chemical compatibility and product purity.
Housing Solutions
To maximize the efficiency of the Pak® cartridges, appropriate housing is essential. ErtelAlsop provides housings in various orientations and finishes.
| Housing Type | Description | Best Use Case |
|---|---|---|
| Vertical Housing | Standard orientation, small footprint. | General filtration, tight spaces. |
| Horizontal Housing | Allows for chest-height loading (“Lock and Load” system). No overhead hoist needed. | High-volume industrial processing, safe single-person operation. |
| Sanitary Housing | Highly polished 316L SS, no internal threads, usually Bio-Pak® compatible. | Pharmaceutical, Biotech, Injectables. |
Applications and Industries
The versatility of the Pak® lenticular design makes it suitable for a wide array of markets. By offering high flow rates and superior retention, these filters are utilized in:
- Food & Beverage: Haze removal in distilled spirits, clarification of syrups and juices.
- Botanical Extracts: Removal of waxes and lipids (dewaxing) using DE-impregnated media.
- Pharmaceuticals: API filtration, cell debris removal, and protection of downstream membrane filters.
- Cosmetics: Clarification of perfumes, lotions, and oils.
- Chemicals: Filtration of solvents, resins, and inks.
Why Choose Purecowater?
We specialize in solving complex liquid filtration problems. Whether you need to retrofit an old plate and frame system with a modern lenticular housing or require specific micron ratings for a new product line, our team can guide you to the right ErtelAlsop solution.
Ready to optimize your filtration process?
Contact Us to learn more about ErtelAlsop Pak Filters
Sources:
ertelalsop.com (Lenticular Pak® Cartridges)
clearsolutionscorp.com (Pak Lenticular Filter Specifications)
ertelalsop.com (Lenticular Filter Housings)