CDU Filtration Solutions for Liquid-Cooled Data Centers
A Coolant Distribution Unit (CDU) filter is engineered to keep coolant clean and flowing efficiently within liquid cooling systems. It plays a key role in data centers, AI/HPC facilities, and industrial cooling setups, safeguarding sensitive equipment and supporting uninterrupted system operation.
These filters are ideal for various cooling loops, including primary and secondary CDU filtration, direct-to-chip (D2C) circuits, side-stream immersion cooling, and server rack supply and return lines. With multi-stage filtration options ranging from 5–200 μm microns, they effectively remove debris, particulates, and corrosion, preventing blockages in pipes, pumps, and heat exchangers.
BOLEFIL CDU filters offer customizable inlet/outlet sizes and installation dimensions to fit diverse system designs. Built for high reliability, low pressure drop, and long service life, they ensure smooth and stable coolant circulation, providing critical thermal management support for modern AI, HPC, and large-scale data centers.
Ultra-Low ΔP Design
Patented flow-path optimization ensures minimal pressure drop across 20–120 LPM. Lower ΔP reduces system energy consumption, keeps rack coolant temperatures stable, and improves reliability for high-density AI servers.
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Higher Dirt-Holding Capacity
Large-area pleated media holds 3–5× more debris than standard filters. Extended filtration cycles reduce maintenance and downtime, keeping your cooling systems running smoothly.
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Full Fluid Compatibility
Compatible with water/glycol, dielectric fluids, synthetic coolants, and corrosive liquids. Internals and O-rings are carefully selected to prevent swelling, corrosion, or precipitation, ensuring long-term operation.
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Perfect Fit for Your CDU
Filters can be tailored in length, diameter, inlet/outlet configuration, and mounting style. 3D design is ready in 24 hours, samples delivered in 7 days—ideal for OEMs needing a seamless fit.
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High Reliability
Pressure-tested housings (≥150 psi, upgradable to 300 psi) with vibration stability and filtration accuracy from 5–200 μm. Compliant with ASHRAE, ISO, and UL standards for mission-critical data centers.
Get a QuoteBOLEFIL CDU Filters Solve the Major Challenges in Liquid Cooling Systems
Liquid cooling systems often face challenges that directly impact performance and reliability. Contaminants such as debris, metal fragments, biofilm, and corrosion by-products can block pumps, cold plates, and heat exchangers, reducing coolant flow and heat transfer efficiency. Unfiltered coolant can cause cold plate blockage, a 6–10°C temperature rise in GPU racks, pump failures, and unexpected downtime.
At the same time, increased pressure drop can raise coolant temperatures by 3–8°C in high-density racks, affecting GPU stability and overall system operation. Incompatible materials may also cause swelling, degradation, or precipitation, accelerating corrosion inside cold plates and heat exchangers and shortening coolant lifespan.
BOLEFIL CDU filters address these challenges with engineered solutions:
- High-Quality Materials: Stainless steel and advanced polymers with FKM, EPDM, or PTFE O-rings prevent swelling, corrosion, and precipitation.
- Custom OEM Fit: Filters are tailored to your internal space constraints for seamless integration into any system.
- Reliable Filtration: Multi-stage design efficiently removes debris, particulates, and corrosion by-products.
- Low Pressure Drop: Optimized flow-path design reduces ΔP, maintaining stable temperatures and reliable operation.
- Flexible Installation: Designed for key points in the coolant loop to protect pumps, heat exchangers, and racks.
BOLEFIL CDU filters are designed to meet industry and regulatory requirements, including ASHRAE TC9.9 (Thermal Guidelines for Data Centers), ISO 4406:2021 (Fluid Cleanliness), and UL standards for filters in dielectric fluid systems.
All materials comply with REACH and RoHS regulations, and Material Safety Data Sheets (MSDs) are provided for all coolant-contact components.
Why BOLEFIL CDU Filters Are Your Ideal Choice
BOLEFIL CDU filters simplify integration into liquid cooling systems by offering fast design turnaround and flexible customization. No matter the connection type, flange size, or overall dimensions, our engineering team can prepare a tailored 3D design in just 24 hours. Samples are ready for delivery within 7 days, even for non-standard configurations. With competitive pricing and rapid prototyping, BOLEFIL makes it easier to implement reliable, high-performance filtration for data centers and industrial cooling setups.
Strainers & Inline Filters for Liquid Cooling Systems
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L-Strainer
The L-Strainer features a 90° design for flexible installation in tight or angled piping layouts. It allows in-line cleaning, supports bi-directional flow, and uses a durable wedge-wire insert for steady performance. Available in standard and high-capacity models, it handles higher flow rates, viscous media, and lower pressure drop needs. Available sizes range from 0.75 inch to 6.0 inch, with customizable mesh grades and drain ports.
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Y-Strainer
The Y-Strainer provides reliable particulate removal to protect downstream equipment. Its in-line cleaning system supports fast maintenance, and the unit allows bi-directional flow with 360° mounting flexibility. Both standard and high-capacity models are available for higher flow or lower pressure drop demands. Sizes from 0.75 inch to 6.0 inch, multiple mesh options, and drain ports can be selected to match specific process needs.
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Sanitary Inline Filter Housing
This stainless-steel inline housing delivers hygienic, corrosion-resistant filtration for sensitive processes. Made from 304 or 316L with a polished finish, it allows easy access for filter changes while maintaining system hygiene. Tri-Clamp connections provide fast and secure integration into pipelines. Ideal for food, pharmaceutical, electronics, and precision cooling systems, it supports a wide range of filter element sizes.
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Popular Products
| Brand | Original Model | BOLEFIL Model | Cartridge Length |
| Pall | Ultipleat® | Max A | 20″, 40″, 60″, 80″ |
| Watts | Big Bubba | Max B | 26.25″ |
| Everblue | FilterBlue series | Max C | 20″ |
| Pentair | Aqualine | Max T | 20″, 40″, 60″ |
| Pall | Marksman | Polykleen Bag Pleated | Size 1, Size 2 |
| 3M | HF740B / HF (Single / Double O-ring) | Ultra H | 10″, 20″, 30″, 40″, 60″ |
| Peco | XstreamPure | Max Iron | 20″, 40″, 60″ |
| Parker | Megaflow Old Model | Max K | 40″ |
| Aqua | Fon Big One / PL Big One Series | Max Q | 20″, 40″ |
| GE | ZPlex | Max G | 20″, 40″ |
| Amazon | FFC | Max Z | 20″, 40″, 60″ |
Certification & Approvals
All our products are manufactured in compliance with international quality, environmental, and health & safety standards, including ISO 9001 and CE certifications. We are committed to delivering reliable filtration solutions that meet rigorous industry standards.:
Case Study
11/26/2025
Reliable 24/7 Filtration for Liquid Cooling Data Centers
Ensure peak performance for your liquid-cooled data center with BOLEFIL CDU Filters—delivering 24/7 reliability, ultra-low pres...
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