Ultra High-Pressure Hydraulic Products, Couplings & Nipples

Series 218, 100 MPa

  • Small external dimensions
  • Extremely high-flow capacity
  • High working pressure
  • Compact design
  • Unique sealing design
  • Non-drip on connection and disconnection
  • Built-in safety device to avoid unintentional disconnection
  • Dust caps included as standard


The Series 218 is a CEJN original that, despite very small outside dimensions, gives an extremely high flow. Both the patented sealing design and non-drip connection and disconnection are standard on CEJN’s High-Pressure range. The coupling also has a safety ring for the locking sleeve to prevent accidental disconnection. Plastic dust caps are standard on both coupling and nipple. The series is an allround coupling that works well in most applications, even if it is mainly recommended where large flow rates are required.


Series 218, 100 MPa
Couplings with safety lock Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 218 1234 102181234-G 3/8”73.434.63070-80T3*
 10 218 1434 102181434-3/8” NPT73.434.63070-80-


Nipples Part No. Remark Connection Length Diameter Hexagon Rec. torque (Nm) Rec. seal. method
Female thread 10 218 6204 102186204-G 3/8”50.527.72470-80T3*
 10 218 6404 102186404-3/8” NPT50.527.72440-50-


*CMS= Cejn metal seal (120° cone), T1= rubber metal seal (19 950 0061), T2= rubber metal seal (19 950 0062), T3= rubber metal seal (19 950 0064), T4= high strength rubber metal seal (19 950 0083), W= cupper washer (09 950 4600).
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
Nominal flow diameter: 4.5 mm (11/64")
Flow capacity: 15.0 l/min (3.3 GPM UK)
Max. working pressure: 100.0 MPa
Min. burst pressure: 280.0 MPa
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Hardened, zinc chromate plated steel
Material nipple: Hardened, zinc chromate plated steel
Material seal: Nitrile (NBR) other sealing materials on request

Flow capacity is measured at 0.4 MPa pressure drop.

Oil Flow
Pressure drop, MPa Series 218, 100 MPa Flow l/min. (GPM UK)

Available files for download

Please complete the form below in order to gain access to downloadable product files. The data you provide is for internal information purposes only and will not be published or made available outside of CEJN.