Introduction to ErtelAlsop Pak® Lenticular Filters
For industrial applications requiring high-purity depth filtration without the mess and exposure of traditional plate and frame systems, ErtelAlsop Pak® Lenticular Filters offer a superior solution. As a completely enclosed, pre-assembled depth filtration module, the Pak® system combines the retention capabilities of premium filter sheets with the convenience of a cartridge format.
At Purecowater, we distribute and support ErtelAlsop’s filtration technologies, helping facility operators in pharmaceuticals, food & beverage, and chemical processing upgrade their separation processes.
What is a “Lenticular” Filter?
The term “lenticular” refers to the shape of the filter cells, which resemble a stack of double convex lenses. A Pak® cartridge is assembled from multiple stacked cells (typically 5 to 18). Each cell consists of a pair of depth filter sheets (MicroMedia®, AlphaMedia®, or MicroClear®) sealed around the edges. This design maximizes surface area within a compact footprint, allowing for high flow rates and significant solids loading capacity.
Key Features and Benefits
Designed for Operational Efficiency
The ErtelAlsop Pak® design addresses the limitations of traditional open filtration systems. By utilizing a patented edge-sealing process with polypropylene, these modules ensure a leak-free operation. The modules are housed in a sealed vessel, which protects operators from exposure to fluids and prevents outside contaminants from entering the process stream—a critical feature for pharmaceutical and food grade applications [ertelalsop.com].
Versatile Media Options
ErtelAlsop manufactures a wide range of media grades to suit specific retention requirements. The modules are capable of nominal retentions ranging from 0.25 to 15 microns. Whether your application requires the removal of haze, wax, lipids, or particulate matter, there is a specific media formulation available:
- Zeta-Pak®: The “workhorse” of the line, incorporating Diatomaceous Earth (DE) and cellulose for high zeta potential and fine particle retention. Ideal for botanical extracts and haze removal [store.clearsolutionscorp.com].
- Disc-Pak®: Comprised of 100% cellulose (AlphaMedia™) with no inorganic aids like DE or Perlite. This is essential for applications like dielectric oils, perfumes, and certain beverages where mineral extractables must be avoided [clearsolutionscorp.com].
- MicroClear®: Activated carbon-impregnated media for color and odor remediation.
Technical Specifications
Below is a breakdown of the standard specifications for the ErtelAlsop Pak® Lenticular Cartridges. These modules are designed to fit standard lenticular housings (12-inch and 16-inch diameters).
| Specification | Details |
|---|---|
| Diameters Available | 12-inch (30.5 cm) and 16-inch (40.6 cm) |
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| Number of Cells | Typically 5 to 18 stacked cells per module |
| Core Material | Polypropylene |
| Gasket Materials | EPDM, Nitrile, Viton, Silicone |
| End Cap Configurations | Flat Gasket or Double O-Ring (Code 8/222 style) |
| Filter Media Types | Cellulose, Diatomaceous Earth (DE), Perlite, Activated Carbon |
Common Applications
Due to their robust design and variety of media options, these filters are utilized across diverse sectors:
- Food & Beverage: Polishing syrups, spirits, juices, and removing haze from beer and wine.
- Pharmaceuticals: Clarification of broths and API processing requiring pharmaceutical-grade validation.
- Botanical Extracts: The Zeta-Pak® series is particularly effective for dewaxing and removing lipids from ethanol extractions due to the high adsorption capacity of the DE media [store.clearsolutionscorp.com].
- Chemical & Industrial: Filtration of lubricating oils, coolants, and resins.
- Cosmetics: Clarification of perfumes and essential oils.
Housing Compatibility
ErtelAlsop Pak® cartridges are compatible with most standard lenticular housings. For new installations, ErtelAlsop offers both vertical and horizontal filter housings. The Horizontal Filter Housing is particularly notable for its “Lock and Load” system, which allows for ergonomic loading of cartridges at waist height, significantly reducing change-out times compared to vertical overhead hoisted systems [ertelalsop.com].
Ready to Upgrade Your Filtration System?
The ErtelAlsop Pak® Lenticular Filters provide a scalable, efficient, and sanitary alternative to traditional plate and frame presses. Whether you need the high solids loading of the Zeta-Pak® or the purity of the Disc-Pak®, Purecowater can help you select the precise configuration for your flow rate and retention needs.
Need help selecting the right lenticular module?
Contact Purecowater Today