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Series 267, DN4 Brass

  • One-hand-operated coupling with non-drip design
  • Durable and robust to withstand long periods of connection
  • Different safety levels to avoid mixing media and incorrect flow direction


CEJN series 267 no-spill quick connect couplings are adaptable to virtually all thermal management applications and system requirements. Made of brass, this affordable DN4 coupling with non-drip design ensures zero spillage and eliminates pollution and air inclusion during connection and disconnection for long-term use and reliable liquid cooling. The quick disconnect is available in three configurations: double shut-off, single shut-off and straight through. Series 267 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 467, 567, 667 and 767. Please refer to series 277 for a stainless steel version. For other sizes in stainless steel, refer to series 477, 577, 677 and 777. 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 diameter 4.0 mm (0.2″)
Water flow (double shut-off) 17 l/min (3.7 GPM UK)
Max. working pressure 20 bar (290 PSI)
Min. burst pressure 80 bar (1160 PSI)
Temperature range -15°C — +100°C (5°F — +212°F)
Material coupling Nickel-plated brass
Material nipple Nickel-plated brass
Kv (double shut-off) 0.39
Cv (double shut-off) 0.45
Comment Single shut-off must utilize valved coupling and valveless nipple

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Technical data:

Coupling (Socket) Part No. Connection Seal Length Diameter Hexagon
Female thread 10 267 1220 G 1/4″ (BSP), green code * EPDM 43.5 23 19
Nipple (Plug) Part No. Connection Seal Length Diameter Hexagon
Female thread 10 267 6220 G 1/4″ (BSP), green code * EPDM 48.5 20 19