For industrial applications requiring high-efficiency particulate removal and significant solids loading capacity, the ErtelAlsop Pak Lenticular Filter stands out as a premier depth filtration solution. Designed to combine the superior filtration mechanics of depth filter sheets with the convenience of a cartridge format, these modules are essential for industries ranging from pharmaceuticals and distilled spirits to botanical extraction and chemicals.
At Purecowater, we specialize in providing top-tier filtration components, including distributor/OEM services for leading brands. This guide details the specifications, operating principles, and applications of ErtelAlsop Lenticular Pak® cartridges.
What is a Lenticular Pak Filter?
The ErtelAlsop Pak® is a depth filter cartridge, often referred to as a lenticular module. Unlike surface filters that trap particles only on the outer layer, these depth filters utilize a tortuous path through a thick media matrix to capture contaminants throughout the entire cross-section of the filter. [ertelalsop.com]
The “lenticular” name is derived from the shape of the filter cells. The cartridge is assembled from multiple stacked cells, each consisting of two circular depth filter sheets sealed at the edges. This stacked disc design maximizes surface area within a compact footprint, allowing for high flow rates and extended service life.
Core Construction Features
- Design: 12-inch or 16-inch diameter modules containing 5 to 18 stacked cells.
- Edge Sealing: Patented polypropylene edge sealing process prevents bypass and ensures structural integrity.
- Core Material: typically rugged polypropylene for chemical compatibility.
- End Configurations: Available in Flat Gasket or Double O-Ring styles for secure sealing in housings.
Technical Specifications
ErtelAlsop Pak modules are highly versatile, available in various micron ratings and media formulations to suit specific process requirements. The following table outlines standard specifications found in industrial setups [store.clearsolutionscorp.com]:
| Specification | Details |
|---|---|
| Micron Ratings | 0.25 µm – 15 µm (Nominal) |
| Module Diameters | 12 inch (30.5 cm), 16 inch (40.6 cm) |
| Media Formulations | Cellulose, Diatomaceous Earth (DE), Perlite, Activated Carbon |
| End Cap Styles | Flat Gasket, Double O-Ring (e.g., 222, 226) |
| Zeta Potential | Positive charge (Micro-Media) for sub-micron particle attraction |
| Gasket Material | EPDM, Silicone, Viton, etc. |
Media Types and Filtration Mechanisms
The performance of the Pak cartridge depends heavily on the chosen filter media. ErtelAlsop offers several distinct series:
1. Micro-Media® Series
These filters are pre-impregnated with Diatomaceous Earth (DE) or Perlite. They are known for high zeta potential, which attracts negatively charged contaminants like bacteria and haze colloids. This series is effective for capturing ultra-fine particles and removing waxes or lipids in botanical extracts. [store.clearsolutionscorp.com]
2. AlphaMedia™ Series
A cellulose-based media ideal for general-purpose coarse clarification. It offers excellent flow rates and is often used as a pre-filter to protect tighter downstream membranes.
3. MicroClear® Series
This series incorporates activated carbon into the depth filter matrix. It is specifically designed for decolorization, odor removal, and the reduction of trace organic impurities without the mess associated with loose carbon powder.
Key Applications
Due to their robust construction and scalability, ErtelAlsop Pak filters are utilized across a broad spectrum of industries:
- Botanical Extraction: Removal of waxes, lipids, and fine particulates from ethanol or hydrocarbon extracts. The DE content aids in winterization processes.
- Distilled Spirits & Beverages: Haze removal and polishing for cognac, whiskey, and wine to ensure clarity and shelf stability.
- Pharmaceuticals (API): Clarification of solvents and catalyst removal (e.g., recovering platinum or palladium from carbon catalysts). [ertelalsop.com]
- Chemical Processing: Filtration of specialty chemicals, silicone production, and resins.
- Utility Oils: Removal of water and carbon from transformer and insulating oils (using formulations like the AquaKv-Pak®).
Advantages Over Plate & Frame Filters
While traditional plate and frame filters use similar media sheets, the Lenticular Pak format offers significant operational advantages:
- Closed System: The modules are housed in a sealed vessel, reducing exposure to the environment and eliminating leakage (drip-free).
- Rapid Changeout: Replacing a single module is significantly faster and less labor-intensive than manually stripping and dressing a plate and frame press.
- Scalability: Housings can accommodate 1, 2, 3, or 4 high stacks of modules to linearly increase filtration area.
Contact Purecowater for Sizing and Quotes
Choosing the correct micron rating, media type, and gasket configuration is critical for process optimization. Whether you need a 12-inch Micro-Media module for extraction or a large-scale housing for water treatment, Purecowater can assist.
We supply high-quality industrial filtration components and can help you navigate the options available from manufacturers like ErtelAlsop, Veolia, and others.
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