Gas Products, Gas Couplings & Nipples

Series 171

  • Automatic safety locking feature
  • Double seal function for extra safety
  • Cross connection between series is impossible

Series 171 is specially designed for gas applications with a high flow valve. Like most other CEJN couplings, this series offers one-hand-operated connection, an integrated safety feature that prevents unintentional disconnection and a color coded (red) locking sleeve and nipple. Couplings and nipples with female thread connection features an internal sealing cone. The part number for dust caps are 09 171 1000 for couplings, 09 171 1050 for nipples in general and 09 171 1051 for nipples with thread connection.



  • Conversion factors for the flow from air to other gases:
  • Acetylene = Air flow x 1,05
  • Oxygen gas = Air flow x 0,95
  • Nitrogen = Air flow x 1,02
  • Lp-gas = Air flow x 0,81
  • Town gas = Air flow x 1,49
Series 171
Technical data
Nominal flow diameter: 5 mm (3/16")
Air flow: 720 l/min (25.4 CFM)
Max. working pressure: 10 bar (145 PSI)
Min. burst pressure: 40 bar (580 PSI)
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Yellow pickled brass/aluminium. Seal material EPDM
Material nipple: Yellow pickled brass/aluminium

Flow capacity is measured at 6 bar (87 PSI) inlet pressure, and pressure drop at 0.5 bar (7 PSI).

Coupling Part No. Connection A B C D E
  10 171 10211017110215 mm (3/16")576.72219-
 10 171 10221017110226.3 mm (1/4")6.376.72219-
 10 171 10231017110238 mm (5/16")878.72219-
 10 171 102410171102410 mm (3/8")1078.72219-
 10 171 1224101711224G 3/8", left-hand thread-67.22219-
 10 171 1234101711234G 3/8", right-hand thread-67.22219-


Nipple Part No. Connection A B C D E
  10 171 50011017150015 mm (3/16")560.520-34
 10 171 50021017150026.3 mm (1/4")6.360.520-34
 10 171 50031017150038 mm (5/16")863.520-37
 10 171 500410171500410 mm (3/8")1063.520-36.5
 10 171 5224101715224G 3/8", left-hand thread-54.5221928


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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