Danfoss Power Solutions launches MQD and MQDB quick-disconnect couplings for electronics and data center liquid cooling applications

NORDBORG, DENMARK — Danfoss Power Solutions today announced the launch of its Danfoss Hansen? MQD and MQDB series of quick-disconnect couplings, engineered for single-phase water/glycol cooling systems in electronics and data center liquid cooling applications. The MQD hand-mate and MQDB blind-mate couplings feature a compact design ideal for high-density server racks. The couplings are fully interchangeable with MQD couplings from other vendors.

Danfoss MQD and MQDB couplings maximize reliability while enabling high flow rates and simplified installation and maintenance. Every MQD and MQDB component Danfoss produces is helium-leak tested for maximum integrity. Color-coded connectors offer simple identification. The couplings are available in size 02, 03, and 04 (3.3, 4.9, and 6.4-millimeter nominal flow diameters, respectively), with flow rates ranging from 2 to 6.8 liters per minute.

Danfoss Hansen. MQD and MQDB free download catalog
Fact sheet > Danfoss Hansen. MQD and MQDB

“Danfoss is proud to have shaped the MQD specification, setting benchmarks for reliability and performance in liquid cooling for AI and high-performance computing. As heat loads increase, liquid cooling is no longer optional — it's essential,” said Chinmay Kulkarni, Senior Product Manager, Data Center, Danfoss Power Solutions. “Our MQD and MQDB couplings deliver robust performance, safety, and compatibility, making them the ideal choice for next-generation cooling systems for compute trays.”

Danfoss Hansen MQD and MQDB couplings feature 304 stainless steel construction for corrosion resistance plus EPDM seals for durability. The couplings are offered with ISO 11926-3 O-ring boss, BSPP, and hose tail terminal ends for application versatility. The couplings feature an operating temperature range of -40°C to 150°C (-40°F to 302°F).