In the field of breathing air application there are no compromises to be made regarding quality and safety. CEJN has extra stringent tests to ensure that the high quality demanded is achieved. CEJN couplings and nipples for breathing air are thoroughly examined and tested individually, this to guarantee that each coupling and nipple that leaves our production is of the highest quality.

Series 141
DN 2.5 mm. Air fllow capacity of 86 l/min (3.0 CFM) and water flow capacity of 3.5 l/min (0.8 GPM UK). Max working pressure 10 bar (150 PSI). The series is made of chrome-plated brass and suitable for compressed air, fluid and vacuum applications.

Series 221
DN 5.0 mm (3/16"). Air flow capacity of 580 l/min (20.5 GPM uk). Max working pressure 35 bar (508 PSI). Made of chrome-plated brass with NBR seal.

Series 341
DN 7.4 mm (9/32"). Flow capacity of 1950 l/min (68.8 CFM). Max working pressure 35 bar (508 PSI). Made of nickel-plated brass with NBR seals. Ideal for cushion inflation and diving applications.

Series 342
DN 7.4 mm (9/32"). Flow capacity of 1950 l/min (68.8 CFM). Max working pressure 35 bar (508 PSI). Made of zinc-plated steel/brass. The automatic safety-locking feature prevents unintentional disconnection

Series 344
DN 7.4 mm (9/32"). Flow capacity of 1950 l/min (68.8 CFM). Max working pressure 35 bar (508 PSI). Made of nickel-plated brass with NBR seals. Primarily for breathing air firefighting applications, but is also well suited for diving equipment.

Series 345
DN 6.2 mm (1/4"). Flow capacity of 1100 l/min (38.8 CFM). Max working pressure 35 bar (508 PSI). Made of nickel-plated brass with NBR seals. Well-suited for breathing air diving applications and for applications that demand a closed system when disconnected, such as surface air diving (hookah).

Series 346
DN 7.0 mm (9/32"). Flow capacity of 800 l/min (28.2 CFM). Max working pressure 35 bar (508 PSI). Made of stainless steel (AISI 316) with NBR seals. Ideal choice for applications in tough environments.

Series 347
DN 6.2 mm (1/4"). Flow capacity of 1100 l/min (38.8 CFM). Max working pressure 35 bar (508 PSI). Made of nickel-plated brass with NBR seals. The nipple is non-interchangeable with other CEJN series couplings making it useful in applications with multiple access points for different media.

Series 348
DN 4.1 mm (5/32"). Flow capacity of 650 l/min (22.9 CFM). Max working pressure 10 bar (145 PSI). Made of nickel-plated brass/stainless steel with EPDM seals. Well-suited for fire-fighting applications.

Series 441
DN 10.4 mm (13/32"). Flow capacity of 3950 l/min (139.4 CFM). Max working pressure 35 bar (508 PSI). Made of nickel-plated brass with NBR seals. Well-suited for air cushion inflation and breathing air diving applications in which extra high airflow is required.

Series 442
DN 10.4 mm (13/32"). Flow capacity of 3950 l/min (140.0 CFM). Max working pressure 35 bar (508 PSI). Made of zinc-plated brass with NBR seals. Well-suited for large supply lines for portable equipment with multiple air outlets.