UQDB couplings
OCP (Open Compute Project) Liquid cooling Dry break
The Universal Quick Disconnect blind-mate (UQDB) coupling for data center applications is developed within the OCP (Open Compute Project) initiative, an initiative that has established a new global standard within the data center industry community for quick connect couplings. Compact design, blind-mate function and +/- 1 mm radial misalignment tolerance are features that makes this coupling solution a perfect fit for Direct Liquid Cooling (DLC) applications within the data center segment.
Technical data
| Nominal flow diameter (mm) | 3.2, 6.4, 9.5, 12.7 mm |
| Max working pressure (bar) | 10 bar |
| Main material | Stainless steel (AISI 303) |
The universal quick disconnect blind-mate coupling for DLC applications
CEJN has long experience in quick coupling technology for thermal management, and our expertise has made us one of the contributors to the Open Compute Project (OCP) – a collaborative community developing interchangeable quick coupling solutions for liquid cooling systems.
The OCP UQDB is a non-drip quick connect coupling solution with blind-mate function developed within the Open Compute Project (OCP) initiative. Together with its compact design and +/- 1 mm radial misalignment tolerance, it is a perfect fit for Direct Liquid Cooling (DLC) applications within the data center segment.
Features
- Interchangeable with OCP UQDB
- Spill-free
- Compact design
- UL-IEC 62368-1 G.15.2.3 approved EPDM seal
- Facilitates hot swaps
- +/- 1 mm radial misalignment tolerance
- Double O-ring seal for redundancy and extra leak protection
- O-ring Boss threads (ISO 11926-3) as standard, other connections available upon request

CEJN – Open Compute Project (OCP) Solution Provider
CEJN is an active contributor to the Open Compute Project (OCP) and participates directly in the development of OCP liquid cooling coupling standards. Our quick couplings are designed to meet these standards, ensuring full compatibility, safety, and optimal performance. All CEJN OCP solutions are developed and produced in-house, giving full control over quality, reliability, and delivery.
UQD / UQDB – Contributed with testing and collaboration with other manufacturers.
BMQC – Supported development and testing to ensure reliable, fully compatible couplings.
LQC – Co-developing the standard initiated by Meta, contributing with design, testing and production.
PBMC – Supported development and testing to ensure reliable, fully compatible couplings.
Wide offer of high-performing coupling solutions for the data center industry
Whether you need a coupling solution for liquid cooling in the applications of Direct Liquid Cooling (DLC), Coolant Distribution Units (CDU), or Immersion Cooling, you can rest assured that our wide offer will meet and exceed your specific needs and requirements.
Manuals and brochures
UQDB flow charts
Connecting the data center industry
Quick Connect Couplings:
A Critical Component in Liquid Thermal Management Solutions