Thermal Control Products, Non-Drip Couplings & Nipples

Series 477, DN6 Stainless steel

  • Quick connect coupling with dry disconnect capability
  • Compact and robust stainless steel version
  • Optional colour-coded coupling feature

The reliable and robust quick disconnect coupling series 477 stainless steel is corrosion-free and adaptable to virtually all applications and system requirements within thermal control management. The one-hand-operated connector has a non-drip design to ensure practically no spill while it eliminates contamination and air inclusion. The series is available in three versions: double shut-off, single shut-off and straight through. Series 477 with DN6 is also available with color-coding and/or key coding for extra safety. Optional seal material is available upon request.


The series is available in four other sizes: series 277, 577, 677 and 777. Please refer to series 467 for an all-brass version. For other brass sizes, see series 267, 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. http://www.cejn.com/upload/download/Brochures/SERIES-467-477-WATER-FLOW-CEJN.pdf (Water Flow Series 477 PDF)

Applications: High-performance computing racks/switch blades, Chassis manifolds, cold plates, rack CDU manifolds, GPU manifolds, LED equipment, fuel cells, graphic cards, theatre projectors, medical imaging equipment.

Series 477, DN6 Stainless steel
Technical data
Nominal flow diameter: 6.0 mm (1/4"")
Water flow (double shut-off): 18 l/min (4.0 GPM UK)
Max. working pressure: 20 bar (290 PSI)
Min. burst pressure: 80 bar (1160 PSI)
Temperature range: -20°C — +80°C (-4°F — +176°F)
Material coupling: Stainless steel, AISI 316
Material nipple: Stainless steel, AISI 316
Kv (double shut-off): 1.08
Cv (double shut-off): 1.25
Comment: Also available in singel shut-off or straight through version.

Water flow capacity measured at 1.0 bar (14.5 PSI) pressure drop.

Fluid Flow
Pressure drop, bar (PSI)
Series 477, DN6 Stainless steel
Flow l/min, (GPM UK)
Couplings(Socket) Part No. Connection Seal Length Diameter Hexagon
Female thread 10 477 1220104771220G 3/8" (BSP), greeen codeEPDM452922


Nipple (Plug) Part No. Connection Seal Length Diameter Hexagon
Female thread 10 477 6220104776220G 3/8" (BSP), greeen codeEPDM--22


Check with an authorized CEJN distributor for availability and prices. Other connections and sealing material on request. Some part numbers may be subject to minimum order quantities. CEJN reserves the right to make changes without further notification. Thread connections are listed according to ISO Standards. All measurements are in mm.

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Available files for download