Danfoss Hansen® Universal Quick Disconnect Blind-Mate (UQDB)
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Introduction
The Danfoss Hansen Universal Quick Disconnect Blind-Mate (UQDB) has been designed in collaboration with the OCP (Open Compute Project) community to establish an industry standard for thermal management applications in data centers. This quick disconnect coupling is available in four different sizes (-02, -04, -06, -08) and adheres to OCP specification requirements. The Danfoss UQDB features a self-alignment capability, assisting connection in areas with limited access or visibility, and guarantees 100% helium-leak testing on every coupling.
Features and Benefits
- Designed per OCP UQDB specifications
- "Blind-connection" capability thanks to self-alignment feature with 1 mm radial compensation
- Push-to-connect design
- Direct connection between servers and manifolds
- High flow rate and reduced pressure drop for improved system efficiency
- Flat-face dry break design to prevent spillage during connection/disconnection
- Available sizes: -02, -04, -06, -08
- High reliability and 100% helium-leak tested
- Standard material: 303 stainless steel for excellent corrosion resistance
- Standard seal material: EPDM for excellent fluid compatibility
- Terminal ends are ORB
- Operating temperature: 10°C - 65°C (50°F - 149°F)
- Working pressure: minimum 10 bar
- QR code marking for easy identification and tracking of production parts
Solutions for Liquid Cooling Challenges
Danfoss' direct-to-chip cooling solutions extend into server racks, providing efficient routing of flexible, kink-free hoses and leak-free, helium-tested couplings. Danfoss offers a comprehensive portfolio of premium fluid conveyance products to meet thermal management system needs.
The diagram illustrates an IT Chassis within a server rack, connected via interior server hoses to manifolds. The connection point is identified as a blind-mate QD coupling. The UQDB coupling is shown as a Plug and Socket component, designed for high flow rate and no spillage, making it ideal for in-rack applications where visibility and/or access are limited.
Technical Specifications
Physical Characteristics
| Size | Body Size | Nominal Flow Dia- meter | Max operating pressure | Min burst pressure | Rated Flow | Cv Value | Air Mis- sion (radial) | Fluid Loss max. | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (in) | (mm) | (bar) | (psi) | (bar) | (psi) | (bar) | (psi) | (lpm) | (gpm) | (mm) | ||||||
| UQDB02 | 1/8 | 2.8 | 20 | 290 | 20 | 290 | 20 | 290 | 60 | 870 | 2.1 | 0.55 | 0.31 | 0.04 | 0.02 | 1 |
| UQDB04 | 1/4 | 5.5 | 16 | 232 | 16 | 232 | 16 | 232 | 48 | 696 | 6.4 | 1.7 | 1.22 | 0.04 | 0.025 | 1 |
| UQDB06 | 3/8 | 6.3 | 10 | 145 | 10 | 145 | 10 | 145 | 30 | 435 | 11.36 | 3.0 | 2.23 | 0.093 | 0.035 | 1 |
| UQDB08 | 1/2 | 7.9 | 10 | 145 | 10 | 145 | 10 | 145 | 30 | 435 | 17.8 | 4.7 | 3.76 | 0.096 | 0.044 | 1 |
Seal Elastomer Data
| Seal Elastomer | Operation Temperature Range | |
|---|---|---|
| °C | °F | |
| EPDM | -40°C +150°C | -40°F +302°F |
Performance Parameters
| Size | Plug Recommended ORB Size | Plug Torque N.m | Socket Recommended ORB Size | Socket Torque N.m |
|---|---|---|---|---|
| UQDB02 | 7/16-20 UNF-2A | 9-10 | 9/16-18 UNF-2A | 15-17 |
| UQDB04 | 9/16-18 UNF-2A | 15-17 | 3/4-16 UNF-2A | 25-28 |
| UQDB06 | 3/4-16 UNF-2A | 25-28 | 7/8-14 UNF-2A | 30-33 |
| UQDB08 | 7/8-14 UNF-2A | 30-33 | 1 1/16-12 UNF-2A | 48-53 |
Dimensions
| OCP UQDB size | Part number | Part | Thread/size | Fig. | ORB n° | A (mm) | B (mm) | C (mm) | E2E length (mm) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (in) | (in) | (in) | (in) | (in) | (in) | |||||||
| UQDB02 | 2UQBS56ORM | Socket | 9/16-18 | 1 | 1 | 33.6 | 1.32 | 23.6 | 0.93 | 20 | 0.79 | 35.8-37.2 |
| UQDB02 | 2UQBP44ORM | Plug | 7/16-20 | 2 | 36.1 | 1.42 | 27 | 1.06 | 20 | 0.79 | ||
| UQDB04 | 4UQBS75ORM | Socket | 3/4-16 | 1 | 2 | 39.6 | 1.55 | 28.5 | 1.12 | 23.6 | 0.92 | 44.0-45.4 |
| UQDB04 | 4UQBP56ORM | Plug | 9/16-18 | 2 | 45.32 | 1.78 | 35.3 | 1.39 | 25 | 0.98 | ||
| UQDB06 | 6UQBS87ORM | Socket | 7/8-14 | 1 | 1 | 44.4 | 1.74 | 31.7 | 1.24 | 28.4 | 1.11 | 47.5-48.9 |
| UQDB06 | 6UQBP75ORM | Plug | 3/4-16 | 2 | 49.9 | 1.96 | 38.9 | 1.53 | 28.4 | 1.11 | ||
| UQDB08 | 8UQBS106ORM | Socket | 1 1/16-12 | 1 | 1 | 50.7 | 2.00 | 35.6 | 1.40 | 31.3 | 1.23 | 51.8-53.2 |
| UQDB08 | 8UQBP87ORM | Plug | 7/8-14 | 2 | 55.6 | 2.19 | 42.9 | 1.69 | 31.3 | 1.23 | ||
Flow Rate vs. Pressure Drop
The relationship between flow rate and pressure drop for Danfoss UQDB couplings is illustrated by performance curves. As the flow rate increases, the pressure drop across the coupling also increases. The Coefficient of Flow (Cv) values for each model are as follows: UQDB02 (Cv = 0.31), UQDB04 (Cv = 1.22), UQDB06 (Cv = 2.23), and UQDB08 (Cv = 3.75).
Company Information
Any information provided, including but not limited to product selection, application, use, design, weight, dimensions, capacity, or other technical data in manuals, catalogs, descriptions, advertisements, etc., is considered informative and binding only to the extent explicitly referenced in a quotation or order confirmation. Danfoss is not responsible for possible errors in catalogs, brochures, videos, or other materials. Danfoss reserves the right to alter products without notice, including for products ordered but not delivered, provided such alterations do not change the product's form, fit, or function. All trademarks are property of Danfoss A/S or its group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.
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