Introduction to High-Performance Depth Filtration
For industrial applications requiring reliable solids removal and exceptional dirt-holding capacity, AJR Filtration String Wound Cartridge Filters represent a gold standard in depth filtration. As a distributor for premier filtration solutions, Purecowater is proud to offer these versatile cartridges designed to protect processes, equipment, and final product quality.
String wound filters are the workhorses of the filtration world, employing a manufacturing process that winds continuous media yarn around a support core in a precise diamond pattern. This creates a honeycomb structure that captures particles not just on the surface, but throughout the entire depth of the cartridge.
Product Series Overview
Purecowater provides access to AJR’s two primary string wound distinct product series, catering to both standard and critical high-efficiency applications.
1. DW Series (Standard Depth Filtration)
The DW Series is the industry standard for economical and effective filtration. These cartridges are manufactured using high-speed winding machinery that creates precise diamond patterns to define the specific micron rating. They are designed to remove solids from water, process fluids, and compressed gases.
- Versatility: Available in a massive range of materials (Polypropylene, Cotton, Rayon, Polyester, etc.) to ensure chemical compatibility.
- Construction: Continuous lengths from 3" to 72" eliminate joints that can lead to bypass.
- Application: Ideal for pre-filtration, potable water, and general industrial fluids.
2. EEF Series (High Efficiency <1μm)
For applications requiring finer separation, the EEF Series incorporates a 3-ply SMS polypropylene, nonwoven final filter layer downstream of the wound pre-filter section.
- Superior Efficiency: Achieve up to 99% efficiency for 0.5-micron particles.
- Target Use: Perfect for protecting critical downstream equipment, such as Reverse Osmosis (RO) membranes, or for ink and coating filtration where fine particulate removal is non-negotiable.
Technical Specifications
One of the main advantages of choosing AJR filters through Purecowater is the ability to customize the cartridge to your exact process conditions (temperature, chemical aggressiveness, and housing size).
| Feature | DW Series Specs | EEF Series Specs |
|---|---|---|
| Micron Ratings | 0.5 – 200 μm (Nominal) | 0.2, 0.5, 1, 2 μm (High Efficiency) |
| Standard Lengths | 3" to 72" (Continuous) | 3" to 72" (Continuous) |
| Diameters | 2.0" to 4.5" | 2.0" to 4.5" |
| Core Covers | Optional (for fiber migration control) | Integrated Nonwoven Final Layer |
Material Compatibility Guide
Selecting the right media and core material is crucial for performance and safety. The table below outlines common material options available for these cartridges.
| Component | Material Options | Max Temp (Typical)* |
|---|---|---|
| Filter Media | Polypropylene (FDA listed available) | 140°F (60°C) |
| Cotton (Bleached or Natural) | 250°F (121°C) | |
| Polyester, Nylon, Rayon | Varies (up to 275°F depending on type) | |
| Core Material | Polypropylene (Standard) | 140°F (60°C) |
| 304 or 316 Stainless Steel | High Temp / High Pressure | |
| Tinned Steel | General Purpose |
*Temperature limits are dependent on the combination of media and core selected. Contact Purecowater for specific application advice.
Key Applications
AJR String Wound filters are versatile enough to be used across a broad spectrum of industries. Common installation points include:
- Water Treatment: Pre-filtration for Reverse Osmosis (RO) to reduce Silt Density Index (SDI).
- Food & Beverage: Removal of solids from potable water and processing fluids (FDA grade media available).
- Chemical Processing: Filtration of acids, bases, plating solutions, and solvents.
- Oil & Gas: Treatment of produced water, tracking fluids, and petrochemicals.
- Industrial Manufacturing: Filtration of coolants, paints, inks, and electronic coatings.
Why Choose AJR String Wound Filters?
- Cost-Effective Depth Filtration: High dirt-holding capacity means fewer change-outs and lower operational costs.
- Custom Fit: End caps (DOE, 222, 226) and lengths up to 72" ensure these fit into almost any existing filter housing.
- Reliable Supply: Manufactured domestically with high-speed precision winders for consistent quality.
Contact Purecowater for Sizing and Pricing
Whether you need a direct replacement for an existing string wound filter or are sizing a new filtration housing, Purecowater can assist in selecting the correct micron rating and material for your specific fluid stream.