Depth Filter Cartridges
High Dirt-Holding Capacity Filtration for Water, Chemicals, Process Fluids, and Industrial Applications
Filtersource offers a complete line of depth filter cartridges designed to remove suspended solids, sediment, rust, scale, and particulate contamination from industrial process streams. Available in melt-blown, string wound, and resin bonded constructions, our depth filters provide cost-effective filtration solutions for water treatment, chemical processing, food and beverage manufacturing, oil and gas operations, and general industrial applications.
Whether you're protecting reverse osmosis membranes, improving product quality, or extending equipment life, our filtration specialists can help identify the right cartridge for your process.
Need help selecting a replacement filter?
Upload your current part number, cartridge specifications, or application requirements and our team will provide a recommendation.
What Is a Depth Filter Cartridge?
Unlike surface filters that capture particles primarily on the outer layer of media, depth filter cartridges trap contaminants throughout the entire thickness of the filter structure.
As fluid flows through the cartridge, particles of varying sizes are captured within progressively smaller pore spaces. This allows depth filters to hold significantly more contamination before requiring replacement.
Benefits of Depth Filtration
- High dirt-holding capacity
- Long service life
- Cost-effective operation
- Excellent sediment removal
- Available in a wide range of micron ratings
- Suitable for high particulate loading applications
- Ideal for pre-filtration and equipment protection
Depth filter cartridges are commonly used when contaminants are present in moderate to high concentrations and extended filter life is desired.
How to Select the Right Depth Filter Cartridge
Choosing the right cartridge depends on your fluid, contaminants, and process requirements.
Step 1: Identify the Contaminant
Common contaminants include:
- Sand
- Rust
- Scale
- Sediment
- Fibers
- Carbon fines
- Process solids
Understanding the type and size of contaminants helps determine the appropriate filter media and micron rating.
Step 2: Select a Micron Rating
Micron ratings indicate the size of particles the filter is designed to remove. Visit our Micron Rating Guide to learn more about filter ratings.
Step 3: Choose Cartridge Construction
Different depth filter technologies are designed for different operating conditions.
Melt-Blown Filter Cartridges
Best for:
- Water treatment
- Process water
- Reverse osmosis pretreatment
- General industrial filtration
Benefits:
- High dirt-holding capacity
- Consistent pore structure
- Excellent value
- Broad chemical compatibility
Melt-blown cartridges are among the most widely used depth filters in industrial water applications.
String Wound Filter Cartridges
Best for:
- Paints and coatings
- Viscous fluids
- Process chemicals
- Oils and lubricants
Benefits:
- High contaminant loading capacity
- Wide material options
- Excellent structural strength
- Adaptable to specialized applications
String wound cartridges are often selected when handling difficult fluids or high particulate loads.
Resin Bonded Filter Cartridges
Best for:
- Fine particulate removal
- Critical process filtration
- Applications requiring rigid cartridge construction
Benefits:
- Consistent filtration performance
- Strong mechanical strength
- Excellent resistance to unloading
Resin bonded filters are frequently used where reliable particle retention is essential.
OEM Replacement Filter Cartridges
Filtersource can assist with replacement cartridges for many leading filtration manufacturers.
Need a Cross-Reference?
Our team can help identify equivalents and replacements for:
- Existing OEM filter cartridges
- Obsolete part numbers
- Competitive products
- Custom filtration applications
Upload a Part Number
Send us:
- Existing filter number
- Cartridge dimensions
- Micron rating
- Application details
We'll help identify a compatible replacement.
Frequently Asked Questions
What is a depth filter cartridge?
A depth filter cartridge captures contaminants throughout the entire thickness of the filtration media rather than only on the surface.
What is the difference between depth filtration and surface filtration?
Depth filtration traps particles within multiple layers of media, while surface filtration captures contaminants primarily on the outer surface.
What micron rating should I choose?
The correct micron rating depends on contaminant size, process requirements, and desired filtration performance.
Which is better: melt-blown or string wound?
Neither is universally better. Melt-blown filters are often preferred for water applications, while string wound cartridges excel in viscous fluids and specialty applications.
How often should depth filter cartridges be replaced?
Replacement intervals depend on contaminant loading, flow rate, pressure drop, and process conditions. Many facilities replace cartridges when differential pressure reaches a predetermined limit.
Can depth filters be cleaned and reused?
Most industrial depth cartridges are designed for replacement rather than cleaning.
Need Help Finding the Right Depth Filter Cartridge?
Every filtration application is unique. Our team can help determine the best cartridge for your specific application.
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