CEJN part of the development of the OCP PBMC – Pivoting Blind Mate Coupling for data centers

Innovation drives CEJN. We’re always exploring new ways to meet—and exceed—the demands of various applications, especially in the fast-moving data center industry. Within the Open Compute Project (OCP), CEJN is contributing to developing a new coupling solution to support increased liquid cooling demands: the OCP PBMC – Pivoting Blind Mate Coupling.

As power levels rise, so does the need for higher flow rates and more advanced cooling solutions. The Open Compute Project (OCP) – a collaborative community developing open-standard solutions for liquid cooling systems – is now focused on introducing a new coupling solution to the market: the PBMC. CEJN is proud to contribute to this initiative. “We have been part of the OCP community for many years now as one of the key partners developing quick connect coupling solutions,” says Alice Hägnander, Project Leader, DC-Tech Division at CEJN. “Being involved in developing and setting specifications together with other industry leaders and companies to create open-source liquid cooling solutions is exciting and demonstrates CEJN’s expertise.”

By gathering all key competencies and resources in-house, CEJN ensures full control over every stage of development – from design and testing to production and delivery. “Our test environment, together with CEJN engineers, allows us to verify performance and functionality at every stage, ensuring robust and dependable solutions,” Alice adds.

Unique design

The PBMC supports radial and angular misalignment, as well as distance variations. It delivers a flow rate of 36 litres per minute and includes self-centring functionality and a fixed installation connection. “The fixed connection is an advantage for system builders, as the hardness of the hose or tube does not affect PBMC mobility. It also provides more flexibility in how they choose to place the hose or tube within the IT system,” explains Robin Hansen, Design Engineer, DC-Tech Division at CEJN.

Although self-centring is part of the PBMC design specification, CEJN has taken it a step further by developing a version that performs very well with and without pressure.

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3 key features of OCP PBMC

Wide range of coupling solutions for the data center industry

CEJN offers a comprehensive portfolio of coupling solutions designed for data center applications, several of which have been developed within the OCP community. These include the OCP UQD, UQDB, and BMQC for DLC (Direct Liquid Cooling) applications, and the OCP LQC for CDU (Coolant Distribution Unit) systems.

Additionally, CEJN’s portfolio includes Smartflow dry break couplings and ultraFLOW STC, which ensure safe and efficient fluid transfer and are ideal for CDU applications.

The OCP PBMC will be available on the global market first half of 2026.