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CEJN® Series 345 Couplings

  • Series 345 is a double shut-off series with both a valved coupling and nipple. The specially designed valve provides an extremely high rate of airflow. This series is well-suited for breathing air diving applications and for applications that demand a closed system when disconnected, such as surface air diving. Like most other CEJN breathing air couplings, Series 345 offers one-hand-operated connection, an integrated safety feature that guards against unintentional disconnection, a grip-friendly locking sleeve, and a broad connection range.



Technical Data Summary
Specification Details  
Nominal Flow Diameter 6.2mm
Coupling Material Nickel Plated Brass
Nipple Material Nickel Plated Brass
Maximum Working Pressure  
35 bar
Maximum Burst Pressure  
140 bar
Standard Flow Rate  
1100 l/min (38.8 CFM)
Temperature Range  
  -30°c to +100°c (-22°F to +212°F)


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

    • CEJN® Series 345 Female Coupling
    CEJN® Series 345 Female Coupling
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    CEJN® Series 345 Hose Tail Coupling
    CEJN® Series 345 Hose Tail Coupling
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    CEJN® Series 345 Male Adaptor
    CEJN® Series 345 Male Adaptor
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    CEJN® Series 345 Female Adaptor
    CEJN® Series 345 Female Adaptor
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