For industrial applications requiring extended filter life and superior dirt-holding capacity, the AJR Nominal Depth Cartridge (NDC) represents a significant upgrade over standard liquid bag filters. Designed to fit directly into existing bag filter housings, these pleated cartridges maximize surface area and filtration efficiency without requiring vessel modification.
The NDC series features a pleated design that fits standard #1 and #2 bag baskets.
What is the AJR Nominal Depth Cartridge?
The AJR NDC is a pleated filtration element constructed using nominal felt media. Unlike traditional flat filter bags, the NDC utilizes a dual-layer pleat design. This construction incorporates a pre-filter layer and a final filtration layer, which work together to capture varied particle sizes throughout the depth of the media rather than just on the surface.
This “depth” filtration mechanism, combined with the pleated geometry, provides 5 to 10 times the surface area of a standard filter bag. The result is a substantial increase in dirt-holding capacity, significantly reducing the frequency of change-outs and lowered operational costs.
Key Features and Benefits
- Extended Service Life: With up to 10x the surface area of standard bags, NDCs last significantly longer, reducing downtime for filter changes.
- High Dirt Holding Capacity: The two-layer felt construction allows for effective depth filtration, trapping particles within the matrix of the media.
- Universal Compliance: Polypropylene and Polyester materials meet FDA regulations for food contact under CFR21, Section 177.1520.
- Silicone-Free Construction: Ideal for paint, ink, and coating applications where silicone contamination must be avoided.
- Easy Retrofit: Designed to fit most standard Size #1 and Size #2 strainer baskets, allowing for an immediate performance upgrade without buying new vessels.
Technical Specifications
The NDC is versatile and compatible with a wide range of industrial fluids. Below are the core technical specifications available for these cartridges.
| Specification | Details |
|---|---|
| Micron Ratings | 1, 5, 10, 25, 50, 100, 200 micron |
| Filter Media | Polyester (PE) or Polypropylene (PO) Felt |
| Construction Style | Pleated (Dual Layer: Pre-filter & Final Layer) |
| Maximum Temperature | Polypropylene: 200°F Polyester: 275°F |
| End Cap Configurations |
Small Cap (Fits 6-5/8″ OD Filtrek) Big Cap (Fits 7-1/8″ OD Rosedale) Flanged Cap (Fits 7-1/8″ OD FSI) |
| Available Sizes | Size #1 and Size #2 length configurations |
Ideal Applications
Because of its robust construction and high flow capabilities, the AJR NDC is suited for a variety of demanding industries:
- Food & Beverage: Using FDA-compliant materials for safe process filtration.
- Chemical Processing: Broad chemical compatibility with Polypropylene and Polyester options.
- Paints, Inks, and Coatings: Silicone-free construction ensures no cratering or adhesion issues in final products.
- Water Treatment: Excellent for pre-filtration and sediment removal in high-flow water systems.
Why Upgrade to Pleated Cartridges?
Standard bag filters perform surface filtration, where particles form a cake on the exterior. Once this cake restricts flow, the bag must be changed. The AJR Nominal Depth Cartridge utilizes depth filtration. The pleated design not only increases the physical area available to catch debris but also utilizes the thickness of the felt media to trap smaller particles deep inside the complex matrix.
This results in a lower initial pressure drop and a more gradual rise in differential pressure, allowing the filter to stay in service much longer than a comparable bag.
Need Help Selecting the Right NDC?
Choosing the correct micron rating, material, and end-cap style is critical for optimal system performance. Purecowater can assist in crossing over your existing part numbers or engineering a new solution for your vessel.