Introduction to ErtelAlsop Pak® Lenticular Filters
For industrial applications requiring superior solids loading and particulate retention, ErtelAlsop Pak® Lenticular Filters act as a robust solution. As a modern alternative to traditional plate and frame filtration, these depth filter modules—often referred to as lenticular cartridges—offer a totally enclosed, leak-free system that is easy to operate and maintain.
At Purecowater, we specialize in high-performance filtration solutions. The ErtelAlsop Pak® line is designed to handle a wide range of viscosities and contaminant loads, making them a staple in pharmaceutical, food and beverage, and utility oil industries.
ErtelAlsop Pak® Family of Lenticular Depth Filters
Design and Functional Principles
The “Lenticular” design gets its name from the shape of the stacked filter cells, which resemble double convex lenses. A standard Pak® cartridge is assembled from multiple filter cells stacked vertically.
- Construction: Each cell consists of two sheets of depth filter media (such as MicroMedia® or AlphaMedia®) sealed at the edges using a patented polypropylene molding process.
- Flow Path: Liquid enters the housing surrounding the cartridge, passes through the media into the center core, and exits as clean filtrate.
- Scalability: Modules are available in 12-inch (30.5 cm) and 16-inch (40.6 cm) diameters, with stack heights ranging from 5 to 18 cells, allowing users to scale surface area based on batch size and flow rate requirements.
Product Series and Applications
ErtelAlsop offers specific formulations for distinct industrial challenges. Below is a breakdown of the primary Pak® series available.
| Product Series | Primary Media | Key Application |
|---|---|---|
| Zeta-Pak® | MicroMedia® (Cellulose, DE, Resin) | General purpose workhorse; high zeta potential for ultra-fine particle retention. Ideal for haze removal. |
| Bio-Pak® | Pharmaceutical Grades | Cricital pharmaceutical and biotech applications. Features double O-ring seals to ensure zero bypass. |
| ZetaDri-Pak® | Moisture Absorbing Media | Removal of free and emulsified water from oils (transformer oils, silicones). Holds up to 148 oz of water per module. |
| Disc-Pak® | AlphaMedia® (100% Cellulose) | Applications sensitive to extractables or metal ions. Contains no resins or binders. |
| AquaKv-Pak® | Hybrid Media | Reconditioning dielectric fluids and turbine lubes; combines particulate retention with water removal. |
12-inch Pak® Configuration
Technical Specifications
The effectiveness of the Pak® filters lies in their wide compatibility and structural integrity. The cartridges are designed to fit into standard lenticular housings, including sanitary and industrial designs.
General Operating Data
- Micron Ratings: Nominal retention from 0.25 to 15 microns.
- Diameters: 12″ and 16″.
- Core Material: Polypropylene or Stainless Steel straps.
- Gasket Materials: Viton, Buna-N, Neoprene, EPDM, Silicone, Teflon Encapsulated.
- End Cap Styles: Flat Gasket or Double O-Ring (for critical sealing).
Media Formulation Options
Choosing the right media is critical for process success. ErtelAlsop offers several formulations:
- AlphaMedia (Cellulose): 100% cellulose for basic particulate removal. No resins or fillers.
- MicroMedia (High Performance): Blends cellulose, filter aids (DE/Perlite), and resin binders for high solids loading and positive zeta potential.
- MicroClear (Carbon): Incorporates activated carbon for color and odor removal without the mess of bulk carbon powder.
- MicroMedia XL/LXL (High Purity): Low extractables media designed for high-purity pharmaceutical streams.
Why Switch to Lenticular Filtration?
Many facilities upgrade from plate and frame presses to lenticular Pak® filters to improve operational hygiene and reduce downtime.
- Operator Safety: The system is totally enclosed, preventing exposure to process fluids and eliminating leakage associated with open presses.
- Quick Change-Out: Modules can be replaced in minutes rather than houts, significantly reducing labor costs.
- Regenerable Options: Certain formulations, like the backwashable Zeta-Pak®, allow for extended service life under specific conditions.
Contact Purecowater for Filtration Solutions
Whether you need to remove water from transformer oil with the ZetaDri-Pak® or require pharmaceutical-grade clarification with the Bio-Pak®, Purecowater can help you select the correct configuration for your housing.
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