Industrial filtration demands solutions that are not only effective but also versatile and easy to handle. For applications requiring high particle retention and significant solids loading capacity, the ErtelAlsop Pak Lenticular Filter stands out as a premier depth filtration choice. As a trusted distributor tackling complex solid and liquid filtration problems, Purecowater is proud to highlight this robust technology.
What is the ErtelAlsop Pak Lenticular Filter?
The ErtelAlsop Pak® represents a sophisticated evolution of traditional plate and frame filtration. It is a lenticular depth filter module comprised of multiple stacked filter cells. Each cell consists of a pair of depth filter sheets (such as MicroMedia® or AlphaMedia®) sealed around the edges. When assembled, these cells resemble a stack of double convex lenses—hence the term “lenticular.”
These cartridges are designed to operate within a closed housing, providing a leak-free, sanitary, and easy-to-change system compared to open filter presses. They are widely considered the “workhorse” of depth filtration due to their ability to handle a broad range of viscosities and particulate loads.
Key Technical Specifications
The Pak® cartridges are highly customizable to fit specific process requirements. Below is a breakdown of the standard specifications available for industrial applications.
| Feature | Specification Details |
|---|---|
| Diameter Options | 12-inch (30.5 cm) and 16-inch (40.6 cm) |
| Micron Ratings | Nominal ratings from 0.25 µm to 15 µm |
| Filter Media Types | MicroMedia® (Cellulose/DE), AlphaMedia®, MicroClear® (Carbon) |
| End Configurations | Double O-Ring, Flat Gasket |
| Gasket Material | EPDM, Silicone, Viton, Buna-N |
| Core Material | Polypropylene (standard), Stainless Steel options |
How It Works: The Depth Filtration Advantage
Unlike surface filters that trap particles only on the outer layer, the ErtelAlsop Pak utilizes depth filtration. The media is essentially a thick, porous matrix—often impregnated with filter aids like Diatomaceous Earth (DE)—which traps particles throughout the entire thickness of the sheet.
Zeta Potential
Many Pak modules, particularly those using Micro-Media, offer a positive Zeta Potential. This electrokinetic property allows the filter media to attract and hold negatively charged ultra-fine particles (such as bacteria or endotoxins) that are smaller than the physical pore size of the media. This results in superior retention efficiency and fluid clarity.
Primary Applications
The versatility of the Pak Lenticular Filter makes it suitable for a diverse set of industries. Because the media is sealed in a cartridge, it eliminates the drip and leakage often associated with plate and frame filters, making it ideal for high-value or hazardous liquids.
- Pharmaceuticals: Clarification of broths, removal of carbon catalysts, and lipid removal.
- Botanical Extraction: Excellent for removing waxes and lipids from extracts while maintaining high flow rates.
- Food & Beverage: Polishing filtration for distilled spirits, syrups, vinegar, and edible oils.
- Chemical Processing: Filtration of silicone, solvents, and specialty chemicals.
- Utilities: Cleaning of transformer and insulating oils (e.g., Aquakv-Pak® series).
Why Choose ErtelAlsop Pak Filters?
When selecting a filtration solution, efficiency and reliability are paramount. Here is why the Pak series is a preferred choice for Purecowater clients:
- Scalability: Available in varying cell counts (5 to 18 cells per stack), allowing users to scale up surface area without changing the footprint of the housing.
- Ease of Use: The pre-assembled module design means filter change-outs take minutes rather than hours.
- Chemical Compatibility: With polypropylene cores and various gasket options, these filters withstand a wide array of solvents and pH levels.
- High Solids Loading: The rigid cake formed by the media allows for significant contaminant holding capacity before a pressure drop occurs.
Ready to Optimize Your Filtration Process?
Whether you are filtering botanical extracts, industrial chemicals, or food products, selecting the right depth filter module is critical for product quality. Purecowater can help you determine the correct micron rating and media configuration for your specific needs.