Liquid/liquid cooling distribution unit CDU-L2L

rack-mountfor data centers

Overview
The EXTRCOOL Rack-Mounted Liquid-to-Liquid (L2L) Cooling Distribution Unit is a compact, standard rack-mountable CDU purpose-built for high-density liquid cooling deployments in AI and HPC data centers. Designed to pair with NVIDIA GB200/GB300 and next-generation GPU servers, this unit enables efficient heat transfer between server cold plate loops and facility chilled water systems, supporting rack power densities up to 100kW and beyond.

Core Technical Advantages

• Compact Rack-Mount Form Factor Standard 4U rack design fits directly into server racks, eliminating the need for dedicated floor space and simplifying integration with chilled water networks.
• Efficient Liquid-to-Liquid Heat Exchange High-performance plate heat exchangers transfer waste heat from server loops to chilled water systems, supporting high heat loads for dense AI clusters.
• Integrated Monitoring & Control Front-mounted touchscreen HMI with real-time temperature, flow, and pressure monitoring, supporting remote management and BMS integration.
• Plug-and-Play Deployment Pre-configured piping, pumps, and sensors enable rapid connection to server manifolds and facility chilled water systems, cutting commissioning time.
• Leak-Proof, Enterprise-Grade Design Reinforced connections and factory pressure-tested components ensure reliable, 24/7 operation for mission-critical workloads.

Product Specifications (summary table)
Brand: EXTRCOOL
Model Series: CDU-L2L Rack Series
Cooling Type: Liquid-to-Liquid (L2L) Chilled Water Heat Exchange
Product Category: Rack-Mounted Cooling Distribution Unit
Form Factor: 4U standard rack
Compatible Systems: Server cold plate loops, chilled water networks
Place of Origin: Guangdong, China

Model line (Model Number columns)
Model Number: EXT-CDU35LR / EXT-CDU50LR / EXT-CDU100LR / EXT-CDU120LR / EXT-CDU150LR / EXT-CDU200LR / EXT-CDU250LR
Installation Type: In Rack (all models)
Rated cooling capacity: 35kW / 50kW / 100kW / 120kW / 150kW / 200kW / 250kW
Coolant: PG25 (all models)
Working environment (T & H): -10°C ~ 55°C / RH5~90%
Storage environment (T & H): -45°C ~ 70°C / RH5~93%
Inch display screen: 4.3" / 4.3" / 4.3" / 7" / 7" / 7" / 7" (by model)
Approach temperature: 5°C (all models)
Primary side air or liquid temp. (in/out): 35°C / 45°C (all models)
Secondary side liquid temp. (out/in): 40°C/45°C or 40°C/50°C depending on model (see model-specific entries above)
Secondary side rated flow rate: 120 LPM / 160 LPM / 160 LPM / 190 LPM / 240 LPM / 320 LPM / 400 LPM (by model)
Power Supply: AC220V 50/60Hz for some models; 3P AC380V 50/60Hz or 3P AC480V 60Hz for others (model dependent)
Dual power ATS: Yes (all models)
Leak Detection: Yes (all models)
Redundant Pump Automatic Switchover: 1+1 (all models)
Power consumption: <0.8 kW / <0.8 kW / <0.8 kW / <1 kW / <2.5 kW / <2.8 kW / <3 kW (by model)
Bypass Online Replaceable Filter: No (all models)
Control type: PID control method, adjust flow rate according to temperature
Communication: Modbus RTU & TCP/IP
Approx. Weight: 50kg / 65kg / 75kg / 85kg / 80kg / 100kg / 110kg (by model)
Protection level: IP55 (all models)
Dimensions (W x D x H) mm: 482 x 870 x 177.8 (some models) / 482 x 870 x 217.2 / 482 x 870 x 265 (model dependent)

Ideal Application Scenarios

• Large-Scale AI Data Centers: Supports high-density liquid cooling deployments for GB200/GB300 GPU clusters.
• HPC & Supercomputing Facilities: Delivers reliable cooling for scientific computing and engineering simulation workloads.
• New-Build Liquid Cooling Data Centers: Optimized for facilities with existing chilled water infrastructure.
• Ultra-High Power Density Racks: Supports 50kW+ rack loads for next-generation AI servers.
• Modular Liquid Cooling Architectures: Ideal for scalable, incremental cooling deployments.

Why Choose EXTRCOOL Rack-Mounted L2L CDU?
The rack-mount form factor eliminates the need for standalone CDU units, offering a space-saving, high-capacity solution for liquid cooling deployments. EXTRCOOL’s L2L CDU combines efficient heat exchange, integrated monitoring, and simplified installation to meet the demanding needs of AI and HPC workloads, ensuring stable, energy-efficient operation year-round.

Frequently Asked Questions

• What is a rack-mounted L2L CDU used for? A rack-mounted L2L CDU transfers waste heat from server liquid cooling loops to facility chilled water systems in a compact rack form factor, ideal for space-constrained data centers with chilled water infrastructure.
• What are the benefits of a rack-mounted vs. standalone L2L CDU? The rack-mount design fits directly into server racks, reducing piping complexity and eliminating the need for dedicated floor space. It is fully pre-tested at the factory, minimizing on-site installation errors and ensuring consistent performance.
• Is the unit compatible with standard chilled water systems? The rack-mounted L2L CDU supports standard chilled water pressures and temperatures, with customizable connections to match most facility chilled water networks.

Caractéristiques / spécifications techniques

• Brand: EXTRCOOL
• Model Series: CDU-L2L Rack Series
• Form Factor: 4U rack-mount
• Cooling Type: Liquid-to-Liquid (L2L) chilled water heat exchange
• Rated cooling capacity range: 35 kW – 250 kW (model dependent)
• Coolant: PG25
• Secondary rated flow rate range: 120 LPM – 400 LPM
• Approach temperature: 5°C
• Display: 4.3" or 7" touchscreen HMI (model dependent)
• Control: PID control, flow rate adjusted by temperature
• Communication: Modbus RTU & TCP/IP
• Leak detection: Yes
• Redundant pump: 1+1 with automatic switchover
• Power supply options: AC220V 50/60Hz or 3P AC380V/3P AC480V (model dependent)
• Protection level: IP55
• Approx. weight range: 50 kg – 110 kg
• Dimensions (WxDxH) examples: 482 x 870 x 177.8 mm; 482 x 870 x 217.2 mm; 482 x 870 x 265 mm (model dependent)