Quick connect coupling 210 Cupla 210-2S, steel - Nitto Kohki 364202100

On construction machinery and hydraulic control equipment the joint is broken several times a day, and no oil should escape when it is. The Nitto Kohki 210 Cupla works up to 20.6 MPa and shuts off in socket and plug at the same time when parted.

• Working pressure up to 20.6 MPa (206 bar, 2990 PSI) for general purpose hydraulics
• Shut-off valves in both socket and plug close on disconnection, so the oil stays in the line
• Flow path designed for low pressure loss, the minimum cross-sectional area runs from 24.5 mm² on the 210-2SP to 235.6 mm² on the 210-8SP
• Nickel-plated special steel body, quenched to take pressure impulses
• NBR seal for -20 °C to +80 °C, fluoro rubber (FKM) for -20 °C to +180 °C available on request
• Five sizes from 1/4 inch to 1 inch, operational for vacuum down to 1.3 Pa in the connected state

Technical data from the manufacturer catalogue

Dimensions

Dimensions in millimetres. Values in brackets apply in the connected condition.

Legend: L = overall length; T = thread or barb size

Models in this series 210 CUPLA

Every model of the series as printed in the manufacturer catalogue. The row of the article offered here is highlighted.

Operating principle

• Hydraulic CUPLA with a working pressure of 20.6 MPa {210 kgf/cm2}.
• Structure is designed to reduce pressure loss to the lowest, and is suitable for hydraulic applications that need big flow rates.
• Both socket and plug have built-in automatic shut-off valves that prevent fluid outflow when disconnected.
• The body material is quenched to cope especially with impulses.
• Various end configurations.
• Fluid flow can be bi-directional when socket and plug are connected.

Series comparison

Choose 210 CUPLA when the hydraulic line runs at up to 20.6 MPa {210 kgf/cm2} and needs two-way shut-off together with low pressure loss at large flow rates. For higher pressure, the siblings are 280 CUPLA at 27.5 to 31.5 MPa {281 to 321 kgf/cm2}, 350 CUPLA at 34.5 MPa {352 kgf/cm2}, 450B CUPLA at 44.1 MPa {450 kgf/cm2} and 700R CUPLA at 68.6 MPa {700 kgf/cm2}. HSP CUPLA, HYPER HSP CUPLA, HSU CUPLA and S210 CUPLA cover the same pressure class with the same two-way shut-off, but they are separate series and 210 CUPLA is not interchangeable with HSP CUPLA.

Body and seal materials

Applications

• Hydraulic control equipment and power units up to 20.6 MPa
• Construction machinery with frequently changed attachments
• Lines carrying high flow rates where pressure loss has to stay low
• Circuits with pressure impulses, which the quenched body is built for
• Vacuum lines down to 1.3 Pa in the connected state

Compatibility

Sockets and plugs of different sizes cannot be connected. There is no interchangeability between the 210 Cupla and the HSP Cupla or the 280 Cupla, even where individual sizes look similar. Once coupled, fluid flows in either direction.

Standards and compliance

End connections are female Rc 1/4 to Rc 1 threads, the sealing materials are nitrile rubber (NBR, marked SG) as standard and fluoro rubber (FKM, marked X-100) on request.

Safety and application notes

• Precautions for use: There is no interchangeability between 210 CUPLA and HSP CUPLA, 280 CUPLA or 450B CUPLA. Do not connect each other even if some sizes are approximate.
• Before use, please be sure to read the Safety Guide described at the end of this book and the Instruction Sheet that comes with the products.

All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 97. The complete catalogue is available for download on this page.