First CDU with built-in coolant quality control and treatment

Today, DCX Liquid Cooling Systems announced the world’s first CDU system with a built-in coolant control and treatment system. DCX integrated this coolant quality feature into its Facility Coolant Distribution Units (FDUs): a family of 5–8 MW-capable, hyperscale-class Coolant Distribution Units.

The FDU monitors the chemistry of its coolant continuously and corrects it automatically with integrated electronic dosing pumps, supplying inhibitors, biocides, and pH control additives. Hyperscale data centers require a new type of cooling solution.

In today’s liquid-cooled data centers, coolant quality and water treatment are becoming increasingly important issues. Left unmanaged, chemistry drift quietly reduces cooling performance and puts mission-critical capacity at risk. This is why fluid condition can no longer be assessed only through quarterly sampling. It is a safety issue for critical infrastructure.

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Until now, coolant quality assurance has relied on scheduled inspections: sampling the fluid, waiting for laboratory results, and then correcting issues after the fact. But for hyperscale-class deployments, that model is no longer safe enough. When MW-class CDUs serve an entire AI factory, the condition of a coolant loop becomes a matter of critical infrastructure security.

DCX is the first company to close that gap inside the CDU itself. The FDU does not only move heat. It continuously monitors coolant quality and treats the fluid automatically, ensuring that the loop stays within specification between service visits. The result is a new global standard of quality control and operational safety for liquid-cooled critical infrastructure.

• The world’s first hyperscale CDU with built-in inline sensors, coolant quality controls, and electronic dosing pumps that provide continuous and automatic coolant treatment.
• Groundbreaking, hall-scale protection for the fluid that serves every cold plate in the data hall.
• Automatic quality assurance that keeps the loop within specification between scheduled service visits.
• A new safety layer for the most critical cooling infrastructure in the AI factory.

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“At this scale, the coolant is as critical as the pumps” said Maciek Szadkowski, CTO of DCX Liquid Cooling Systems. “With this new feature, we address the most challenging risk in liquid cooling: long-term quality assurance of the cooling medium. Our innovation introduces much-needed control and safety for data center operators and sets the gold standard for the industry.”

The FDU places coolant control in the same frame that moves the coolant. Inline sensors continuously measure turbidity, conductivity, pH, glycol concentration, and corrosion rate, providing continuous monitoring of critical parameters.

Three automatic dosing channels deliver inhibitors, pH additives, and biocides, with every dose counted and logged. The controller maintains pH at a set point and treats fresh make-up fluid in proportion to its volume.

Operators can monitor the entire system on the FDU’s touchscreen, from a single status view to a live diagram of both cooling loops, including their pumps, valves, and dosing lines. The system supports both PG25 and deionized-water loops.

The FDU is an industry-first, facility-scale Coolant Distribution Unit that can serve an entire AI data hall from outside the white space, with up to 8 MW of heat transfer capacity.

The FDU family delivers up to 8 MW of heat transfer at a 2 °C approach temperature and a 45 °C supply temperature (ASHRAE W45/W+), with flow rates of up to 3,000 GPM (11,000 LPM) and four pumps in an N+N or N+1 configuration.

It supports PG25 and deionized-water loops. Built-in coolant quality control and treatment come standard across the FDU family and are available immediately for hyperscale and high-density AI projects.

Key Specifications

• Heat transfer capacity: Up to 8 MW
• Approach temperature: 2 °C
• Supply temperature: 45 °C (ASHRAE W45/W+)
• Flow rate: 3,000 GPM / 11,000 LPM
• Pumps: Four, in N+N or N+1 configuration
• Coolant monitoring: Continuous online sensors monitoring four parameters
• Chemical dosing: Three automatic channels with electronic dosing pumps
• Integrated dosing controller: Managed through the CDU HMI

About DCX Liquid Cooling Systems

DCX Liquid Cooling Systems is a Warsaw-based manufacturer of liquid cooling systems for data centers, including coolant and facility distribution units, direct liquid cooling, immersion cooling, and heat rejection systems. Taiwan-based LITEON Technology Corporation has invested USD 176.08 million in DCX, acquiring a minority stake at a company valuation of USD 704 million. DCX retains its research and development operations in Poland.

Media Contact

Jacek Dolny
Head of Marketing at DCX Liquid Cooling Systems
+48 722 121 255

jacek.dolny@dcx.eu

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