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

Series 525, DN10

  • 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. An extra option for Series 525 couplings and nipples is a pressure eliminator for evacuating residual pressure during connection. Both couplings and nipples 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 (1/4"), DN 12.5 (1/2"), DN 20 (3/4") and DN 25 (1"). For a stainless steel version see Series 526. Available are also a version with viton seals and a free flow version (without valve package).

Series 525, DN10
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: 350 bar (5076 PSI)
Max. working pressure disconnected: 280 bar (4061 PSI)
Min. burst pressure connected: 1300 bar (18854 PSI)
Min. burst pressure disconnected: 1100 bar (15954 PSI)

Rated flow is measured at 0.4 MPa pressure drop.

Pressure drop chart
Series 525, DN10
Couplings Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 1204105251204G 3/8"61.63524NBR
 10 525 1214105251214G 3/8"61.63524FPM


Couplings without valve Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 0204105250204G 3/8"61.63524NBR


Couplings with Pressure Eliminator Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 1234105251234G 3/8"61.63524NBR


Nipples Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 6204105256204G 3/8"382422NBR
 10 525 6214105256214G 3/8"382422FPM


Nipples without valve Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 5204105255204G 3/8"382422NBR


Nipples with Pressure Eliminator Part No. Connection Length Diameter Hexagon Seal
Female thread 10 525 6234105256234G 3/8"382422NBR


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.

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