Hydraulic Products, Nordic Range / 525 - High Performance Poppet Type Couplings

Series 525, DN12.5

  • Manual locking ring for extra security
  • High durability
  • Optional pressure eliminator


Series 525 is a family of quick couplings for hydraulic systems. A manually-operated locking ring provides extra security against involuntary disconnection. Series 525 couplings and nipples have a pressure eliminator as an extra feature for evacuating residual pressure during connection. Both components are made of steel with Zinc-Nickel surface for maximum durability in tough applications and environments.


The Series is also available in four other sizes: DN 6.3, DN 10, DN 20 and DN 25. For a stainless steel version see Series 526. A version with viton seals and a free flow version are also available (without valve package).

Couplings Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 1205 105251205G 1/2"67.64133NBR
 10 525 1215 105251215G 1/2"----


Couplings without valve Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 0205 105250205G 1/2"67.64130NBR


Coupling with pressure eliminator Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 1235 105251235G 1/2"67.64133NBR


Nipples Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 6205 105256205G 1/2"42.52927NBR
 10 525 6215 105256215G 1/2"----


Nipples without valve Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 5205 105255205G 1/2"42.52927-


Nipples with pressure eliminator Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 6235 105256235G 1/2"42.52927NBR


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. All measurements are in mm.
Technical data
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Steel (zinc-nickel)
Material nipple: Hardened steel (zinc-nickel)
Material seal: Nitril (NBR) alt. FPM
Connectability: Part under pressure equipped with eliminator, other part free to drain.
Disconnection under pressure: Not allowed
Max. working pressure connected: 300 bar (4351 PSI)
Max. working pressure disconnected: 250 bar (3625 PSI)
Min. burst pressure connected: 1100 bar (15954 PSI)
Min. burst pressure disconnected: 1000 bar (14503 PSI)

Rated flow is measured at 58 PSI pressure drop.

Pressure drop chart
Pressure drop, PSI Series 525, DN12.5 Flow, GPM

Available files for download

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