For industries requiring rigorous clarification and sterilization-grade filtration, ErtelAlsop Pak® Lenticular Filters represent the gold standard in depth filtration technology. As a distributor for top-tier filtration solutions, Purecowater provides these versatile lenticular modules to tackle complex solid and liquid filtration problems, from botanical extraction to pharmaceutical processing.
This guide explores the engineering, specifications, and applications of the ErtelAlsop Pak® series, designed to replace traditional plate and frame filters with a more user-friendly, enclosed, and efficient system.
What is a Lenticular Filter?
A lenticular filter (often called a module or cartridge) is a depth filtration device consisting of stacked, circular filter cells. Each cell contains depth filter media—typically cellulose, diatomaceous earth (DE), or perlite—encased in a polypropylene cage.
Unlike surface filters that trap particles only on the top layer, ErtelAlsop Pak® filters utilize a tortuous path primarily within the media matrix. This depth filtration mechanism captures high solids loads and ultra-fine particles, including haze and lipids, throughout the entire thickness of the media.
Key Advantages over Plate & Frame Filters
- Closed System: Eliminates product exposure to the environment, preventing contamination and reducing vapor emissions.
- Zero Leakage: No dripping or edge leakage common in plate and frame presses.
- Quick Changeout: Modules can be replaced in minutes rather than hours, significantly reducing labor costs and downtime.
- Scalability: Housings can accommodate 1 to 4 modules vertically, allowing easy scaling of filtration surface area.
Product Variants and Technology
ErtelAlsop, the inventor of the lenticular cartridge format, offers several specific formulations to target different contaminants. Purecowater can help you select the exact media grade for your process.
| Product Line | Media Composition | Best Application |
|---|---|---|
| Zeta-Pak® | Cellulose + Diatomaceous Earth (DE) + Resin | General Purpose: The “workhorse” for botanical extracts, chemicals, and beverages. High positive zeta potential for removing haze and sub-micron particles. |
| Disc-Pak® | 100% Cellulose (AlphaMedia) | Dielectric Oils & Systems Sensitive to Silica: Ideal for transformer oils, syrups, and fragrances where no DE extractables are desired. |
| Bio-Pak® | Pharmaceutical Grade Media | Critical Pharma/Biotech: Designed for strict validation requirements in biologics, vaccines, and blood fractionation. |
| AquaKv-Pak® / ZetaDri-Pak® | Moisture Absorbing Media | Water Removal: Specifically engineered to remove trace water from insulating oils and hydraulic fluids. |
ErtelAlsop Pak Specifications
When configuring a filtration skid, understanding the physical specifications is crucial. The Pak® cartridges are available in standard industry sizes compatible with most lenticular housings.
Technical Data
- Diameters Available: 12 inch (30.5 cm) and 16 inch (40.6 cm).
- Number of Cells: Typically 16 cells (standard), though options range from 5 to 18 cells per module.
- Surface Area:
- 12″ Module (16 cell): Approx. 1.8 m² (19 ft²).
- 16″ Module (16 cell): Approx. 3.7 m² (40 ft²).
- Micron Ratings: 0.25 µm to 20 µm (Nominal).
- Core Material: Polypropylene (standard) or Stainless Steel straps.
- Gasket Materials: EPDM (standard), Viton, Buna-N, Silicone, Teflon Encapsulated.
End Cap Configurations
Ensuring the correct fit for your housing is vital to preventing fluid bypass.
- Flat Gasket (DOE): Requires a tightening nut and follower plate within the housing. Common in older housings.
- Double O-Ring (Plugin): Features two O-rings on the bottom adapter. This modern design plugs directly into the housing receiver, ensuring a positive seal and faster changeouts.
Primary Applications
The versatility of the Micro-Media® and AlphaMedia® used in these Paks allows them to service a wide array of industries.
1. Botanical Extracts (Hemp & Cannabis)
Lenticular filters are the industry standard for winterization and dewaxing. The Zeta-Pak® effectively removes coagulated waxes and lipids at cold temperatures. Furthermore, activated carbon-impregnated modules are widely used for color remediation (removing chlorophyll) in a clean, dust-free format.
2. Food & Beverage
From clarifying distilled spirits and wine to filtering high-fructose corn syrup, these filters remove haze-causing proteins and particulates without affecting flavor profiles.
3. Pharmaceutical & Cosmetics
Bio-Pak® modules are essential for the filtration of perfumes, colognes, and large-molecule biotech products where purity and low-extractables are non-negotiable.
4. Industrial & Utilities
The Disc-Pak® and AquaKv-Pak® are extensively used to maintain transformer oils in the power generation sector, removing carbon and moisture to prevent dielectric breakdown.
Integration with Purecowater Solutions
At Purecowater, we understand that filtration is not “one size fits all.” Whether you are upgrading from a filter press to a closed lenticular system or need to source replacement modules for an existing Veolia or specialized housing, we have the inventory and expertise to assist.
We supply the full range of ErtelAlsop media grades, including:
- Micro-Media XL Series: Ultra-pure DE for low extractables.
- Micro-Clear: Activated carbon immobilized media.
- AlphaMedia: 100% cellulose for ash-less filtration.
Ready to optimize your filtration process?
Contact Purecowater today to discuss sizing, compatibility, or to request a quote for ErtelAlsop Pak Lenticular Filters.