Gas Products, Gas Couplings & Nipples

Series 171 - Acetylene

  • 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 and 09 171 1050 for nipples.



  • 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 - Acetylene
Coupling Part No. Connection A B C D E
  10 171 1021 1017110215 mm (3/16")576.72219-
 10 171 1022 1017110226.3 mm (1/4")6.376.72219-
 10 171 1023 1017110238 mm (5/16")878.72219-
 10 171 1024 10171102410 mm (3/8")1078.72219-
 10 171 1224 101711224G 3/8", left-hand thread-67.22219-
 10 171 1234 101711234G 3/8", right-hand thread-67.22219-


Nipple Part No. Connection A B C D E
  10 171 5001 1017150015 mm (3/16")560.520-34
 10 171 5002 1017150026.3 mm (1/4")6.360.520-34
 10 171 5003 1017150038 mm (5/16")863.520-37
 10 171 5004 10171500410 mm (3/8")1063.520-36.5
 10 171 5224 101715224G 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.
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).

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