Gas Products, Gas Couplings & Nipples

Series 181

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

Series 181 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 (blue) 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 181
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 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
  10 181 10211018110215 mm (3/16")576.72219-
 10 181 10221018110226.3 mm (1/4")6.376.72219-
 10 181 10231018110238 mm (5/16")878.72219-
 10 181 102410181102410 mm (3/8")1078.72219-
 10 181 1234101811234G 3/8", right-hand thread-67.22219-


Nipple Part No. Connection A B C D E
  10 181 50011018150015 mm (3/16")560.521-34
 10 181 50021018150026.3 mm (1/4")6.360.521-34
 10 181 50031018150038 mm (5/16")863.521-37
 10 181 500410181500410 mm (3/8")106321-36.5
 10 181 5224101815224G 3/8", right-hand thread-52221925.5


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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