Introduction to ErtelAlsop Pak® Lenticular Filters
For industries requiring rigorous liquid depth filtration without the mess and exposure associated with traditional methods, ErtelAlsop Pak® Lenticular Filters provide a superior solution. As a leading manufacturer in depth filtration, ErtelAlsop has refined the lenticular cartridge design—originally invented by Alsop Engineering—to offer precise particle retention and high solids loading capacity.
At Purecowater, we distribute optimum filtration technologies to tackle complex solid and liquid separation challenges. This guide breaks down the specifications, benefits, and applications of the Pak® Lenticular Cartridges, including the popular Zeta-Pak® and Disc-Pak® series.
What is a Lenticular Filter?
A Lenticular Pak® cartridge (or module) is a depth filter comprised of stacked filter cells. Each cell is formed by a pair of depth filter media sheets—such as MicroMedia® or AlphaMedia®—with edges sealed via a patented process to prevent bypass. These cells are stacked around a central core, resembling a series of double convex lenses, which gives the format its “lenticular” name.
This design fits inside a totally enclosed housing, making it a modern, operator-friendly alternative to the traditional Plate and Frame filter press. The enclosed system prevents leakage, reduces product loss, and protects operators from exposure to process fluids.
Key Product Series
ErtelAlsop offers several configurations to suit specific viscosity and compatibility needs. Two of the most common series utilized in industrial applications include:
1. Zeta-Pak® (The Workhorse)
The Zeta-Pak® is formulated with Micro-Media®, which contains filter aids like Diatomaceous Earth (DE) or Perlite embedded in a cellulose matrix. These modules are known for their high zeta potential and superior retention of ultra-fine particles, ranging from 0.25 to 15 microns. They are ideal for applications requiring haze removal and high contaminant holding.
2. Disc-Pak® (Cellulose Only)
The Disc-Pak® utilizes AlphaMedia®, a 100% cellulose media free from resins, binders, or inorganic filter aids like DE. This series is perfect for light to medium viscosity liquids—such as dielectric oils, perfumes, and syrups—where it is critical to ensure no active ingredients are stripped by the media.
Technical Specifications
The versatility of the ErtelAlsop Pak® line lies in its wide range of configurations. Below are the general specifications for standard industrial modules.
| Feature | Specification Details |
|---|---|
| Diameter Options | 12 inch (30.5 cm) & 16 inch (40.6 cm) |
| Micron Ratings | 0.25 µm to 15 µm (Nominal) |
| Number of Cells | 5 to 18 cells per module (standard counts: 9, 12, 16) |
| Filter Media Types | Cellulose, Diatomaceous Earth (DE), Perlite, Carbon, Polypropylene |
| End Configurations | Flat Gasket or Double O-Ring |
| Gasket Materials | EPDM, Viton, Silicone, Buna-N |
| Core Material | Polypropylene (Stainless Steel available for high temp) |
Primary Applications
Due to their scalable design and enclosed housing compatibility, Pak® filters are used extensively across various sectors. The large surface area allows for high flow rates while efficiently removing waxes, lipids, and particulates.
- Pharmaceuticals: Clarification of broths, removal of carbon fines.
- Food & Beverage: Filtration of distilled spirits, syrups, soft drinks, and edible oils.
- Botanical Extraction: Efficient dewaxing and lipid removal in ethanol extraction processes with high chemical compatibility.
- Chemical & Industrial: Filtration of lubricating oils, coolants, and resins.
- Cosmetics: Purification of perfumes and lotions without altering scent profiles (using Disc-Pak).
Compatible Housings
ErtelAlsop Pak® cartridges are designed to fit into a variety of housings. Purecowater can assist you in sizing the correct housing for your facility, whether you require:
- Vertical Housings: Standard footprint for general filtration.
- Horizontal Housings: Featuring the “Lock and Load” design for easy operator access and rapid change-outs, eliminating the need for overhead hoists.
Why Choose ErtelAlsop Pak® Filters?
Scalability: Since the modules use the same media as laboratory scale discs and large-scale filter sheets, scaling up from pilot testing to full production is seamless.
Safety & Cleanliness: The enclosed system limits exposure to hazardous liquids and prevents outside contamination.
Efficiency: Rapid cartridge change-out reduces downtime compared to cleaning plate and frame presses.
Need Filtration Assistance?
Whether you need to replace existing modules or engineer a new depth filtration skid, Purecowater works with top OEMs like ErtelAlsop to provide the right solution.
Sources: ErtelAlsop, Clear Solutions.