Breathing Air Products, Couplings & Nipples

Series 347

  • One-hand operation to connect
  • High flow capacity
  • Automatic safety locking feature

Developed to prevent potentially dangerous cross-connections in industrial applications, CEJN Series 347 nipples are noninterchangeable with any other CEJN series couplings. The series is useful in applications with multiple access points for different media, such as breathing air, compressed air, and gas. The double shut-off series has a valved nipple. The special valve design of both the coupling and nipple provide an extremely high rate of airflow. Like most CEJN breathing air series, Series 347 offers one-hand-operated connection, an integrated safety feature that guards against unintentional disconnection, and a grip-friendly locking sleeve.

Couplings Part No. Connection Length Diameter Hexagon
Hose connection 10 347 1004 10347100410.0 mm (3/8")71.724.419
Male thread 10 347 1254 103471254G 3/8"60.524.420
Female thread 10 347 1204 103471204G 3/8"61.524.420

Nipples (valved) Part No. Connection Length Diameter Hexagon
Hose connection 10 347 6004 10347600410.0 mm (3/8")--20
Male thread 10 347 6254 103476254G 3/8"62-20
Female thread 10 347 6204 103476204G 3/8"58.123.120

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: 6.2 mm (1/4")
Air flow: 1100 l/min (38.8 CFM)
Max. working pressure: 35 bar (507 PSI)
Min. burst pressure: 140 bar (2030 PSI)
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Nickel-plated brass
Material nipple: Nickel-plated brass
Material seal: NBR
Interchangeable with: -

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

Air Flow
Pressure drop bar (PSI) Series 347 Flow, CFM (l/min)

Available files for download

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