Pneumatic Products, Standard Couplings & Nipples

Series 320, DN 7.6

  • Extremely high flow capacity
  • One-hand operated
  • Strong and durable

Series 320 couplings feature the original high-flow valve design upon which all other CEJN pneumatic couplings are based. Their popularity has made Series 320 a European standard. The Series is easy-to-handle and one-hand operated and offers long service life. Male threads on the couplings and nipples feature pre-applied thread sealant. Lightweight aluminum styles are also available. The Series eSafe 320 version is disconnected in two stages in order to vent the coupling and minimize the risk of sudden component separation, which has the potential to cause operator injury. The one-hand operation ensures easy handling. The eSafe version complies with ISO Standard 4414 and EN 983.


Series 320 is available in eSafe, Lightweight, Soft-Line and Multi-Link versions. Please refer to the CEJN Fluid range for specialized versions of Series 320 with two-way shutoff (Series 324) and stainless steel design (Series 326).

Series 320, DN 7.6
Technical data
Nominal flow diameter: 7.6 mm (5/16")
Air flow: 2100 l/min (74.1 CFM)
Max. working pressure: 16 bar (232 PSI)
Min. burst pressure: 140 bar (2030 PSI)
Connection force: 70.7 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: Rectus 25/26, Tema 1600/1625, Prevost ESC07/ERC07/ESI07/ISC08, Oetiker SC C, Hansen Auto-Flo 24
Standards: CEJN Original, Eurostandard, 7.4 mm
Markets: Global

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 320, DN 7.6
Flow, l/min. (CFM)
Couplings Part No. Connection
Hose connection 10 320 10021032010026.3 mm (1/4")
 10 320 10031032010038 mm (5/16")
 10 320 10091032010099 mm
 10 320 100410320100410 mm (3/8")
 10 320 100510320100513 mm (1/2")
Male thread 10 320 1152103201152R 1/4"
 10 320 1154103201154R 3/8"
 10 320 1155103201155R 1/2"
 10 320 1452103201452NPT 1/4"
 10 320 1454103201454NPT 3/8"
 10 320 1455103201455NPT 1/2"
Female thread 10 320 1202103201202G 1/4"
 10 320 1204103201204G 3/8"
 10 320 1205103201205G 1/2"
 10 320 1402103201402NPT 1/4"
 10 320 1404103201404NPT 3/8"
 10 320 1405103201405NPT 1/2"
Stream-Line connection 10 320 10581032010585x8 mm
 10 320 10601032010606.5x10 mm
 10 320 10621032010628x12 mm
 10 320 10631032010639.5x13.5 mm
 10 320 106610320106611x16 mm


Soft-Line couplings Part No. Connection
Hose connection 10 320 108610320108610 mm (3/8")
 10 320 108710320108713 mm (1/2")
Stream-Line connection 10 320 10891032010896.5 x 10 mm
 10 320 10901032010908 x 12 mm
Female thread 10 320 1246103201246G 1/4"
 10 320 1247103201247G 3/8"


Nipples Part No. Connection
Hose connection 10 320 50011032050015 mm (3/16")
 10 320 50021032050026.3 mm (1/4")
 10 320 50031032050038 mm (5/16")
 10 320 50091032050099 mm
 10 320 500410320500410 mm (3/8")
 10 320 500510320500513 mm (1/2")
Male thread 10 320 5151103205151R 1/8"
 10 320 5152103205152R 1/4"
 10 320 5154103205154R 3/8"
 10 320 5155103205155R 1/2"
 10 320 5263103205263G 1/4"
 10 320 5264103205264G 3/8"
 10 320 5265103205265G 1/2"
 10 320 5451103205451NPT 1/8"
 10 320 5452103205452NPT 1/4"
 10 320 5454103205454NPT 3/8"
 10 320 5455103205455NPT 1/2"
Female thread 10 320 5201103205201G 1/8"
 10 320 5202103205202G 1/4"
 10 320 5204103205204G 3/8"
 10 320 5205103205205G 1/2"
 10 320 5401103205401NPT 1/8"
 10 320 5402103205402NPT 1/4"
 10 320 5404103205404NPT 3/8"
 10 320 5405103205405NPT 1/2"
Stream-Line connection 10 320 50581032050585 x 8 mm
 10 320 50601032050606.5 x 10 mm
 10 320 50621032050628 x 12 mm
 10 320 50631032050639.5 x 13.5 mm
 10 320 506610320506611 x 16 mm
 10 320 506810320506813 x 18 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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