Gas Products, Gas Couplings & Nipples

Series 172

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

Series 172 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 (orange) 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 172
Nominal flow diameter: 5 mm (")
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 NBR.
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
  10 172 10011017210015 mm (3/16")576.72219-
 10 172 10021017210026.3 mm (1/4")6.376.72219-
 10 172 10031017210038 mm (5/16")878.72219-
 10 172 100410172100410 mm (3/8")1078.72219-
 10 172 1204101721204G 3/8" left-hand tread-67.22219-


Nipple Part No. Connection A B C D E
  10 172 50011017250015 mm (3/16")560.520-34
 10 172 50021017250026.3 mm (1/4")6.360.520-34
 10 172 50031017250038 mm (5/16")863.520-37
 10 172 500410172500410 mm (3/8")106320-36.5
 10 172 5204101725204G 3/8" left-hand tread-54.52219-


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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