Pneumatic Products, eSafe Couplings & Nipples

Series 310 eSafe, DN 5.3

  • Vented safety function
  • High flow capacity
  • Strong and durable

eSafe Series 310 offers a wide range of easy-to-grip couplings, including Soft-Line and Stream-Line. Male threads on the couplings and nipples feature pre-applied thread sealant. eSafe Series 310 is a vented safety coupling that is disconnected in two stages in order to vent the coupling and minimize the risk of sudden component separation. The coupling is fully automatic to ensure quick and easy handling. eSafe series complies with ISO Standard 4414 and EN 983.


Series 310 is also available in standard, Soft-Line and Multi-Link versions.

Series 310 eSafe, DN 5.3
Technical data
Nominal flow diameter: 5.3 mm (7/32")
Air flow: 950 l/min (33.5 CFM)
Max. working pressure: 16 bar (232 PSI)
Min. burst pressure: 140 bar (2030 PSI)
Connection force: 86 N
Temperature range: -20°C — +100°C (-4°F — +212°F)
Material coupling: Zinc-plated steel/brass
Material nipple: Hardened zinc-plated steel
Interchangeable with: Atlas Copco QIC8, Parker Rectus 23/24, Parker Tema 1400/1423, Prevost ISC06/ISI06, Foster 3003, Oetiker B1, Hansen 3000
Standards: ISO 6150 B, A-A 59439 5.3 mm
Markets: Benelux, France, North America, Norway

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

Air Flow
Pressure drop, bar (PSI)
Series 310 eSafe, DN 5.3
Flow, l/min. (CFM)
eSafe vented safety coupling Part No. Connection
Hose connection 10 310 20021031020026.3 mm (1/4")
 10 310 20031031020038 mm (5/16")
 10 310 20091031020099 mm
 10 310 200410310200410 mm (3/8")
 10 310 200510310200513 mm (1/2")
Male thread 10 310 2152103102152R 1/4"
 10 310 2154103102154R 3/8"
 10 310 2155103102155R 1/2"
 10 310 2452103102452NPT 1/4"
 10 310 2454103102454NPT 3/8"
 10 310 2455103102455NPT 1/2"
Female thread 10 310 2202103102202G 1/4"
 10 310 2204103102204G 3/8"
 10 310 2205103102205G 1/2"
 10 310 2402103102402NPT 1/4"
 10 310 2404103102404NPT 3/8"
 10 310 2405103102405NPT 1/2"
Stream-Line connection 10 310 20581031020585 x 8 mm
 10 310 20601031020606.5 x 10 mm
 10 310 20621031020628 x 12 mm
 10 310 20631031020639.5 x 13.5 mm
 10 310 206610310206611 x 16 mm


eSafe Soft-Line coupling Part No. Connection
Stream-Line connection 10 310 20801031020806.5 x 10 mm
 10 310 20821031020828 x 12 mm
Female thread 10 310 2232103102232G 1/4"
 10 310 2432103102432NPT 1/4"


Nipples Part No. Connection
Hose connection 10 310 50011031050015 mm (3/16")
 10 310 50021031050026.3 mm (1/4")
 10 310 50031031050038 mm (5/16")
 10 310 500410310500410 mm (3/8")
 10 310 500510310500513 mm (1/2")
Male thread 10 310 5151103105151R 1/8"
 10 310 5152103105152R 1/4"
 10 310 5154103105154R 3/8"
 10 310 5252103105252G 1/4"
 10 310 5451103105451NPT 1/8"
 10 310 5452103105452NPT 1/4"
 10 310 5454103105454NPT 3/8"
 10 310 5455103105455NPT 1/2"
Female thread 10 310 5201103105201G 1/8"
 10 310 5202103105202G 1/4"
 10 310 5204103105204G 3/8"
 10 310 5401103105401NPT 1/8"
 10 310 5402103105402NPT 1/4"
 10 310 5404103105404NPT 3/8"
Stream-Line connection 10 310 50581031050585 x 8 mm
 10 310 50601031050606.5 x 10 mm
 10 310 50621031050628 x 12 mm
 10 310 50631031050639.5 x 13.5 mm
 10 310 506610310506611 x 16 mm


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.

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