At Purecowater, we specialize in solving complex solid and liquid filtration challenges. As a distributor and OEM for top-tier filtration technologies, we are proud to feature the ErtelAlsop Pak® Lenticular Filters. These cartridges represent a significant evolution in depth filtration, offering the high-capacity retention of plate and frame filters with the convenience and sealed containment of a cartridge system.
What Are Lenticular Pak® Cartridges?
Lenticular cartridges, commonly referred to as modules, are depth filter elements designed to replace traditional plate and frame filter presses in many applications. A “Pak” is constructed from multiple lenticular filter cells stacked vertically.
Each cell consists of two precision-cut depth filter sheets (such as MicroMedia®, AlphaMedia®, or MicroClear®) sealed around a polypropylene separator. The edges are hermetically sealed using a patented process, creating a unit that resembles a double convex lens—hence the term “lenticular.” This design provides a significantly higher surface area and solids-loading capacity compared to standard pleated cartridges.
Why Choose Lenticular Technology?
- High Solids Loading: The depth media structure traps particles throughout the thickness of the pad, not just on the surface, allowing for greater retention of deformable particles and gels.
- Leak-Free Design: Unlike filter presses that can drip or leak, lenticular housings are fully enclosed pressure vessels, ensuring a clean and safe operating environment.
- Rapid Change-Out: Swapping out a stack of modules takes a fraction of the time required to dress a plate and frame press, reducing downtime and labor costs.
- Scalability: Modules come in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells), making it easy to scale from pilot to production.
The ErtelAlsop Pak® Series Overview
The Pak® line is engineered to meet diverse industry requirements, from pharmaceutical processing to industrial oil purification. Below is a guide to the specific series available through Purecowater.
| Series Model | Key Features | Primary Applications |
|---|---|---|
| Zeta-Pak® | The “workhorse” of the line. Features positive Zeta Potential for capturing ultra-fine negatively charged particles (like haze or bacteria). | General chemical, Food & Beverage, Cosmetics, botanical extracts. |
| ZetaDri-Pak® | Designed for water absorption. A dual-action filter that removes particulate and holds up to 148 oz of water per module. | Transformer oils, insulating oils, silicone oils, flavorings. |
| Disc-Pak® | Manufactured with 100% cellulose (AlphaMedia). Contains no resins or binders. Ideal for applications sensitive to extractables. | Dielectric oils, coolants, syrups, fragrances, perfumes. |
| Bio-Pak® | Pharmaceutical grade. Features a Double O-Ring seal to ensure zero bypass in critical applications. | Biopharmaceuticals, plasma fractionation, culture media, topicals. |
| AquaKv-Pak® | Combines particulate retention with enhanced water retention. Can recondition dielectric fluids to ASTM standards. | Turbine lube oils, circuit breaker oils, transformer oils. |
Technical Specifications
ErtelAlsop modules are highly customizable. Whether you are retrofitting an existing housing or installing a new filtration skid, these specifications ensure compatibility and performance.
| Filter Diameters | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Micron Retention | Range from 0.25 µm to 15 µm (Nominal) |
| Cell Count per Module | Available in 5 to 18 stacked cells |
| End Cap Configurations | Flat Gasket or Double O-Ring (222/226 styles available) |
| Core Material | Polypropylene or Stainless Steel Straps |
| Gasket Options | Viton, Buna-N, Neoprene, EPDM, Silicone, Teflon Encapsulated |
Available Media Formulations
The core performance of any lenticular filter lies in its media. ErtelAlsop offers several distinct formulations to match chemical compatibility and filtration goals:
- AlphaMedia: 100% Cellulose. No resins, binders, or inorganic fibers. Perfect for applications requiring low extractables.
- MicroMedia: A blend of cellulose, filter aid (DE or Perlite), and resin binders. Combines high flow rates with excellent solids capacity and zeta potential.
- MicroMedia XL Series: Uses ultra-pure Diatomaceous Earth (DE) for critical applications requiring extremely low metal ion extractables.
- MicroClear: Incorporates Activated Carbon into the matrix, allowing for color and odor removal without dealing with loose carbon powder.
Tackle Your Filtration Problems with Purecowater
Whether you need to remove moisture from insulating oil, clarify a botanical extract, or polish a pharmaceutical product, the ErtelAlsop Pak® series offers a robust solution. As a specialized distributor, Purecowater can help you navigate the specific micron ratings, media types, and housing configurations to optimize your process.
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