Quick connect coupling 700R Cupla 700R-4P, R 1/2, steel - Nitto Kohki 391004002

Hydraulic breakers and rock crushers load every coupling point with pressure and impact at the same time. The Nitto Kohki 700R Cupla works up to 68.6 MPa (700 kgf/cm², 686 bar) and is held by a ring-lock system in the sleeve.

• Working pressure up to 68.6 MPa (700 kgf/cm², 686 bar, 9950 PSI)
• Metal-touch valves use no rubber seal, which gives excellent durability
• Two-way shut-off, socket and plug close automatically and no oil spills out on disconnection
• Special sleeve ring-lock system keeps the connection tight under vibration and impact
• Stand-alone leakage rate of 0.05 mL/min, measured at 0.2 MPa on the 700R-3SP and at 0.3 MPa on the 700R-4SP
• Body in nickel-plated special steel, seal in NBR (SG) for -20 °C to +80 °C, FKM (X-100) for -20 °C to +180 °C made to order

Technical data

Applications

• Hydraulic breakers and rock crushers
• Hydraulic circuits running at very high system pressure
• Coupling points under sustained impact loading
• Hydraulic oil lines in 3/8" and 1/2" sizes

Compatibility

Different sizes are not interchangeable. When coupled, fluid may flow in either direction, and the connection is operational in vacuum down to 1.3 Pa.

Standards and compliance

End sizes are 3/8" and 1/2", maximum tightening torques are 40 Nm at 3/8" and 85 Nm at 1/2", and the body material is nickel-plated special steel.