Advanced Depth Filtration with ErtelAlsop Pak® Lenticular Filters
In the world of industrial liquid filtration, precision and efficiency are paramount. For facilities dealing with critical applications in pharmaceuticals, food and beverage, and chemical processing, ErtelAlsop Pak® Lenticular Filters offer a superior solution. As a leading distributor, Purecowater provides these advanced depth filtration modules designed to replace traditional plate and frame filters with a sealed, leak-free, and easy-to-use system.
This guide explores the engineering behind the Pak® cartridges, available configurations like the Zeta-Pak® and Disc-Pak®, and the technical specifications that make them a versatile choice for solid-liquid separation.
What is Lenticular Filtration?
Lenticular filtration combines the advantages of depth filter sheets with the convenience of a cartridge format. The term “lenticular” refers to the shape of the filter cells, which resemble a stack of double convex lenses. Each module is assembled from multiple cells of depth filter media (such as MicroMedia® or AlphaMedia®), sealed together using a patented process.
Unlike open plate and frame presses, these modules operate inside a totally enclosed housing. This design prevents leakage, eliminates atmospheric exposure, and ensures high product integrity—crucial for sanitary applications [ertelalsop.com].
Key Benefits of Pak® Cartridges
- Leak-Free Design: The enclosed housing system minimizes product loss and exposure.
- Rapid Changeout: Modules can be replaced in minutes compared to the hours required for plate and frame presses.
- Scalability: Available in 12-inch and 16-inch diameters with varying cell counts (5 to 18 cells) to match flow rate requirements [ertelalsop.com].
- High Solids Loading: The depth media structure traps particles throughout the matrix, offering high retention capacity for varying particle sizes.
Product Variants: Selecting the Right Module
ErtelAlsop offers specific formulations to target different viscosity ranges and filtration goals.
1. Zeta-Pak® (The Workhorse)
The Zeta-Pak® is the standard for most applications. It utilizes Micro-Media® containing cellulose, filter aids (like Diatomaceous Earth), and a wet strength resin. It is known for its high [clearsolutionscorp.com] zeta potential, making it effective at retaining ultra-fine particles, haze, and biological contaminants.
2. Disc-Pak® (Cellulose Only)
The Disc-Pak® utilizes AlphaMedia®, a 100% cellulose media. It contains no inorganic filter aids like DE or Perlite, making it ideal for applications where maintaining active ingredients (such as in essential oils, syrups, or dielectric oils) is critical [clearsolutionscorp.com].
Technical Specifications
The following table outlines the general specifications for the Pak® Lenticular series.
| Feature | Specification |
|---|---|
| Diameter | 12 inch (30.5 cm) or 16 inch (40.6 cm) |
| Filtering Surface Areas | Dependent on cell count (up to 18 cells per module) |
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| Gasket Materials | EPDM, Buna-N, Silicone, Viton, PTFE |
| End Cap Configurations | Flat Gasket or Double O-Ring |
| Core Material | Polypropylene (Standard), Stainless Steel available |
Housing Options: Vertical vs. Horizontal
To maximize the efficiency of Pak® cartridges, ErtelAlsop provides specialized housings. While vertical housings are standard for smaller footprints, the Horizontal Filter Housing is a standout solution for larger operations. It features a “Lock and Load” system that allows a single operator to load cartridges easily, reducing labor and safety risks associated with overhead hoists [ertelalsop.com].
Primary Applications
ErtelAlsop Pak filters are versatile across various sectors:
- Pharmaceuticals: Clarification of broths, removal of carbon fines.
- Food & Beverage: Haze removal in spirits, syrups, and edible oils.
- Botanical Extracts: Wax and lipid removal using DE-impregnated media [clearsolutionscorp.com].
- Chemicals & Utilities: Filtration of dielectric oils and process fluids.
Get the Right Fit for Your Process
Switching to lenticular filtration can significantly improve your process hygiene and throughput. Whether you need the high efficiency of the Zeta-Pak® or the purity of the Disc-Pak®, Purecowater can help you configure the ideal system.
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