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Series 277, DN4 Stainless steel

  • Quick connect coupling with non-drip design
  • Corrosion-resistant stainless steel AISI 316 version
  • Safety levels to avoid mixing incoming cold line with outgoing hot line


CEJN series 277 no-spill couplings are one-hand operated and adaptable to virtually all thermal management applications for long-term use and reliable liquid cooling. Colour-coded couplings help to ensure hot-to-hot and cold-to-cold connections. The non-drip design of the series ensures zero spillage and eliminates pollution and air inclusion during connection and disconnection. This DN4 stainless steel version of the disconnect coupling is available in double shut-off, single shut-off and straight through. In addition, 277 is also available with colour-coding and/or key coding for extra safety. Optional seal material is available upon request.


The series is also available in four other sizes: series 477, 577, 677 and 777. Please refer to series 267 for a brass version. For other sizes in brass, refer to series 467, 567, 667 and 767. If you can’t find a product that meets your requirements, don’t hesitate to contact us, and we’ll put our R&D department at your disposal. Applications: High-performance computing racks/switch blades, chassis manifolds, cold plates, Rack CDU manifolds, GPU manifolds, LED equipment, fuel cells, graphic cards.

Technical data

Nominal flow diameter4.0 mm (0.2″)
Water flow (double shut-off)17 l/min (3.7 GPM UK)
Max. working pressure20 bar (290 PSI)
Min. burst pressure80 bar (1160 PSI)
Temperature range-5°C — +205°C (23°F — +401°F)
Material couplingStainless steel, AISI 316
Material nippleStainless steel, AISI 316
Kv (double shut-off)0.39
Cv (double shut-off)0.45
CommentSingle shut-off must utilize valved coupling and valveless nipple


More tools are featured in tool catalog.

Technical data:

Couplings (Socket)Part No.ConnectionSealLengthDiameterHexagon
Female thread10 277 1220G 1/4″ (BSP), green code*EPDM43.52319
Nipple (Plug)Part No.ConnectionSealLengthDiameterHexagon
Female thread10 277 6220G 1/4″ (BSP), green code*EPDM48.52019