Fluid conveyance solutions for liquid cooling of data centers
Offering industry-leading solutions with decades of proven performance, Danfoss’s global team of fluid conveyance experts are continually advancing liquid cooling technology to enable the data center of tomorrow.
Why Liquid Cooling?
Increased performance, energy efficiency and cost savings. Direct-to-chip liquid cooling unlocks the full potential of your data center while simplifying installation and maintenance.
Energy sustained
Danfoss’ direct-to-chip liquid cooling improves data center Power Usage Effectiveness (PUE) by efficiently and cost-effectively removing heat emitted by a server processor.
Performance unleashed
The thermal efficiency and reduced space requirements of liquid cooling enables increased chip density, while keeping your high-performing processors cool and running smoothly, even during peak loads. That means consistent computing power and increased performance when you need it most.
Source Line Solutions
Making connections you can count on
From main supply lines to single point connections, Danfoss provides the hardware to make your software work. Our range of fluid conveyance solutions enable you to engineer the safest and most efficient thermal management system for your cutting-edge data center.
Danfoss Hansen® FD83 Full-flow dual-interlock coupling
- Designed for high flow rate and no spillage
Boston by Danfoss Royal™ EHW194 EPDM hose
- Engineered for durability, safety, and ease of use.

Continuous optimized cooling flow
Combining our expertise in fluid conveyance with hydronic balancing and control, CoolTrain™ is a ready-built valve train solution for connecting server racks to the TCS loop. This customizable, plug-and-play solution delivers easy connections, dynamic hydronic balancing, precise flow control and secure motorized shut-off. When required, it can be equipped with a digital fieldbus actuator for telemetry with your DCIM system, enabling remote monitoring and optimization.
- Reliable performance with corrosion-resistant, leak-free components
- Modular design for extended, customizable configurations
- Pre-assembled, pressure-tested, and thoroughly cleaned
- Continuous optimized flow for the most energy-efficient server rack operation


Go with the smart flow
CoolTrain™ customizable valve trains for direct-to-chip-liquid cooling in data centers.
Download brochure
Inner Rack Solutions
Rack connections
Danfoss’ direct-to-chip cooling solutions extend into the racks through efficient routing of flexible, kink-free hoses, and leak free, helium-tested couplings.
Danfoss Hansen Universal Quick Disconnect Coupling (UQD)
- Designed for high flow rate and no spillage
Boston by Danfoss Royal™ EHW194 EPDM hose
- Engineered for durability, safety, and ease of use.

Server blade solutions
To manage the increasing chip densities of today’s data center, Danfoss blind-mate solutions deliver coolant into the server blade using the perfect combination of flexibility, durability, and ease of connection.
OCP Open Rack V3 Blind Mate Quick Connector (BMQC)
- Self-centering design offers misalignment compensation, ensuring secure connection between the blade and rack.
Danfoss Hansen Universal Quick Disconnect Blind-Mate
(UQDB)
- Self-centering design offers misalignment compensation, ensuring secure connection between the blade and rack.

Couplings

Has been designed with OCP (Open Compute Project) community to set industry standard for thermal management application in data
centers.
- Blind-connection thanks to self- alignment feature with radial
compensation of 1 mm - Sizes: -04. Sizes -02/-06/-08 coming soon.
- High flow and reduced pressure drop for an improved system efficiency
- Flat-face dry break design to avoid spillage during connection / disconnection

Designed for high flow rate and no spillage, the UQD coupling is perfect for inner-rack applications with smaller hose lines.
- 303 stainless steel, EPDM seal
- Push-to-connect design
- Meets EDMP-P specifications
- High flow and no spillage
- 100% helium-leak tested

Made to allow hands-free connections, the Blind Mate coupling has two parts, one mounts to the rack manifold and another to the server blade itself, delivering coolant directly to the interior of the blade.
- 303 stainless steel, EPDM seal
- Self-centering design with radial, angular and axial misalignment compensation
- Interchange meets EPDM-P standard
- 100% helium-leak tested
- Size: 5mm




An industry standard, our stainless steel FD83 has been supporting data center liquid cooling reliably for decades.
- Parts cannot be disconnected while liquid is flowing
- Multiple connection configurations
- Full flow and minimal pressure drop
Hoses

Engineered for durability and ease of use, EHW194 hose features industry-leading safety ratings, superior kink resistance and long-lasting performance.
- EPDM-P tube and cover, textile braid reinforcement
- UL94 V0 rating
- Multiple color options available
- Operating temp: -40C to +150C (-40F to 302F)
- Sizes -04, -06, -08, -10 -12, -16, -20, -24, -34
- Qualified and tested with Danfoss Hansen UQD, Danfoss Hansen 1G crimp fittings, Danfoss Hansen hose champs
Adapters

Swiveling functionality for easy and fast connection
- Available for different hose sizes and port and threads
- 304 stainless steel material provides broad fluid compatibility
- Standard seal material: EPDM
Danfoss is a Solution Provider of the Open Compute Project (OCP), a collaborative, community-focused organization working to standardize the design and performance of all hardware for small- to hyper-scale data centers. We’re not just meeting the industry standard; we’re helping set it, both today and into the future.
Learn more

Documents
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Article | Danfoss BMQC Expert Article | English | Multiple | 07 Feb, 2024 | 710.8 KB | |
| Data sheet | Danfoss BMQC Fact sheet | English | Multiple | 12 Sep, 2025 | 414.3 KB | |
| Data sheet | Danfoss CoolTrain™ | English | Multiple | 10 Feb, 2026 | 1.7 MB | |
| Article | Danfoss Hansen FD83 Expert Article | English | Multiple | 27 Nov, 2023 | 696.8 KB | |
| Fact sheet | Danfoss Hansen FD83 Sell Sheet | English | Multiple | 28 Feb, 2024 | 1.5 MB | |
| Data sheet | Danfoss Hansen Universal Quick Disconnect (UQD) Fact Sheet | English | Multiple | 02 Feb, 2026 | 547.9 KB | |
| Fact sheet | Danfoss Hansen Universal Quick Disconnect Blind Mate Fact Sheet | English | Multiple | 02 Feb, 2026 | 435.9 KB | |
| Fact sheet | Danfoss Hansen UQD Couplings | English | Multiple | 31 Mar, 2025 | 381.8 KB | |
| Article | Danfoss UQD Expert Article | English | Multiple | 07 Feb, 2024 | 580.9 KB |