Series 331, DN 7

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Pneumatic Products

Standard Couplings & Nipples

Series 331, DN 7

  • One-hand operated
  • Strong and durable
  • High-flow capacity

Series 331 couplings offer high-flow capacity and are insensitive to vibrations. One-hand operated with steel components for strength and durability.


Technical data
Nominal flow diameter: 7 mm (9/32"Inch)
Air flow: 1600 l/min (56.5 CFM)
Max. working pressure: 16 bar (230 PSI)
Min. burst pressure: 64 bar (930 PSI)
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Zinc-plated steel
Material nipple: Hardened zinc-plated steel
Interchangeable with: Atlas Copco QIC10, Rectus 33, Tema 1650

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

Couplings Part No. Connection
Hose connection 1033110026.3 mm (1/4")
 1033110038 mm (5/16")
 10331100410 mm (3/8")
 10331100513 mm (1/2")
Male thread 103311152R 1/4"
 103311154R 3/8"
 103311155R 1/2"
Female thread 103311202G 1/4"
 103311204G 3/8"


Nipples Part No. Connection
Hose connection 1033150015 mm (3/16)
 1033150026.3 mm (1/4")
 1033150038 mm (5/16")
 10331500410 mm (3/8")
 10331500513 mm (1/2")
Male thread 103315152R 1/4"
 103315154R 3/8"
 103315155R 1/2"
 103315251G 1/8"
 103315252G 1/4"
 103315254G 3/8"
Female thread 103315202G 1/4"


Thread connections are listed according to ISO Standards All measurements are in mm. Check with an authorized CEJN distributor for availability and prices