Introduction to ErtelAlsop Pak® Lenticular Filters
In the world of industrial liquid processing, clarity and purity are paramount. ErtelAlsop Pak® Lenticular Filters, also known as depth filter modules, offer a robust solution for critical filtration applications. Designed to replace traditional plate and frame filters with a more user-friendly, enclosed system, these cartridges provide exceptional particle retention and high solids loading capacity.
As a distributor for premium filtration solutions, Purecowater provides ErtelAlsop Pak® cartridges to help facilities transition to cleaner, more efficient processing lines. Whether you are filtering botanical extracts, pharmaceuticals, or distilled spirits, the lenticular design ensures a scalable and reliable result.
How Lenticular Filtration Works
The term “lenticular” refers to the shape of the filter cells. A Pak® cartridge is assembled from varying numbers of stacked filter cells (typically between 5 and 18). Each cell consists of a pair of depth filter media sheets—such as MicroMedia®, AlphaMedia®, or MicroClear®—sealed at the edges using a patented polypropylene process.
The assembled unit resembles a stack of double convex lenses. Liquid flows from the outside of the cartridge, through the depth media, and into the central core. This depth filtration mechanism traps particles not just on the surface, but throughout the thickness of the media matrix, allowing for superior contaminant holding capacity.
Key Benefit: The Enclosed Advantage
Unlike open plate and frame presses which can leak and expose the product to the environment, lenticular cartridges operate inside a sealed housing. This prevents product loss, eliminates leakage, and protects operators from exposure to process fluids—crucial for pharmaceutical and chemical applications.
Product Configurations and Media Types
ErtelAlsop offers several variations of the Pak® cartridge to suit specific chemical compatibility and filtration needs. Two of the most popular configurations include:
1. Zeta-Pak® (The Workhorse)
The Zeta-Pak® is the standard for most heavy-duty applications. These modules utilise Micro-Media® containing cellulose, high-purity Diatomaceous Earth (DE), and a wet-strength resin.
- Mechanism: Combines mechanical straining with electrokinetic adsorption (zeta potential).
- Best For: Removal of haze, ultra-fine particles, and biological reduction in food, beverage, and pharmaceutical fluids.
2. Disc-Pak® (All-Cellulose)
The Disc-Pak® utilizes AlphaMedia®, which is 100% cellulose and free from inorganic aids like DE or Perlite.
- Best For: Dielectric oils, perfumes, and applications where release of inorganic material must be strictly avoided.
Technical Specifications
Choosing the right module depends on your housing equipment and target retention. Below is a breakdown of the standard specifications for ErtelAlsop Pak® filters.
| Feature | Specification Details |
|---|---|
| Diameters | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Micron Ratings (Nominal) | 0.25 µm to 15 µm |
| Media Types | MicroMedia® (DE/Cellulose), AlphaMedia® (Cellulose), MicroClear® (Carbon) |
| Core Material | Polypropylene |
| End Configurations | Double O-Ring, Flat Gasket |
| Maximum Temperature | Approx. 180°F (82°C) *Consult for specific media limits |
Primary Applications
Thanks to the versatility of depth media, these filters are utilized across a broad spectrum of industries:
- Botanical Extraction: Efficient removal of waxes, lipids, and biomass from ethanol or hydrocarbon extracts.
- Food & Beverage: Haze removal in syrups, distilled spirits, and shelf-stable beverages.
- Pharmaceuticals: Clarification of cell cultures and large volume parenterals (LVPs).
- Chemical Industry: Polishing of silicone oils, inks, and varnishes.
Why Upgrade to Pak® Cartridges?
If your facility is still using manual plate and frame presses, upgrading to lenticular cartridges can significantly reduce labor/changeout time and improve process hygiene. The ErtelAlsop Pak® system allows for:
- Scalability: Over 300 precision dies available to fit virtually any process scale.
- Sterility: Available in pharmaceutical grades suitable for sterile filtration steps.
- Efficiency: High solids loading capacity means longer runs between changeouts.
Need assistance selecting the correct micron rating or media type for your application?
At Purecowater, we specialize in solving complex solid and liquid filtration problems. Whether you need a single housing or a complete skid system, our engineering team is ready to assist.