S210 Cupla
High pressure up to 700 bar
The Nitto Kohki S210 Cupla is a stainless-steel 210-bar-class high-pressure coupling for hydraulic oil, water and test media with an operating pressure up to 210 bar (21 MPa). The stainless-steel version of the 210-bar class.
As an authorised Nitto Kohki distributor we stock 10 variants of the S210 Cupla - bodies in stainless steel (SUS), FKM seals, model series S210-…. Built to PED 2014/68/EU.
| Parameter | Value |
|---|---|
| Type | stainless-steel 210-bar-class high-pressure coupling |
| Operating pressure | up to 210 bar (21 MPa) |
| Body materials | stainless steel (SUS) |
| Seals | FKM |
| Media | hydraulic oil, water and test media |
| Model series | S210-… |
| Standard | PED 2014/68/EU |
| Variants in range | 10 |
Typical applications: high-pressure hydraulics and clamping systems, press and tool making, hydraulic pressure testing and test rigs, water-jet technology.
Technical data from the manufacturer catalogue
| Series | S210 CUPLA |
|---|---|
| Body material | Stainless steel (SUS304) |
| Seal material | Fluoro rubber (FKM), Nitrile rubber (NBR) |
| Max working pressure | 20.6 MPa {210 kgf/cm2} |
| Working temperature | Fluoro rubber (FKM), standard material: -20 to +180 deg C | Nitrile rubber (NBR), made-to-order item: -20 to +80 deg C |
| Valve structure | Two-way shut-off |
| Applicable fluids | Water, Hydraulic oil, Gas |
| Vacuum service | 1.3 Pa {1x10-2 mmHg}. Socket only: -, Plug only: -, When connected: Operational. |
| Size range | 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch |
| Catalogue page | C01en-b, 101 |
Operating principle
- Body material is excellent corrosion resistant stainless steel (SUS304). Suited for use in tough conditions such as ocean development.
- Although it is made of stainless steel, the unique inner seal mechanism enables the working pressure of 20.6 MPa {210 kgf/cm2}, the same as special steel's.
- Separation prevention mechanism (safety lock) ensures tight and secured connection under vibration or impacts.
- Both socket and plug have built-in automatic shut-off valves that prevent fluid outflow on disconnection.
- The products come with dustproof caps.
- Various end configurations.
All models of the series
P - Female thread
| Model | Coupling part | Application | Stainless steel (g) | L | H | øD | C | T |
|---|---|---|---|---|---|---|---|---|
| S210-2P | Plug | R 1/4 | 74 | 50.5 | 19 | 22 | 20 | Rc 1/4 |
| S210-3P | Plug | R 3/8 | 127 | 59 | 24 | 28 | 24 | Rc 3/8 |
| S210-4P | Plug | R 1/2 | 239 | 70.5 | 30 | 35 | 28 | Rc 1/2 |
| S210-6P | Plug | R 3/4 | 446 | 81.5 | 38 | 44 | 35.5 | Rc 3/4 |
| S210-8P | Plug | R 1 | 939 | 100 | 50 | 58 | 47.5 | Rc 1 |
S - Female thread
| Model | Coupling part | Application | Stainless steel (g) | L | H | øD | T |
|---|---|---|---|---|---|---|---|
| S210-2S | Socket | R 1/4 | 137 | (59) | 19 | 27 | Rc 1/4 |
| S210-3S | Socket | R 3/8 | 226 | (68.5) | 24 | 32 | Rc 3/8 |
| S210-4S | Socket | R 1/2 | 406 | (81) | 30 | 39.7 | Rc 1/2 |
| S210-6S | Socket | R 3/4 | 710 | (97.5) | 38 | 48 | Rc 3/4 |
| S210-8S | Socket | R 1 | 1381 | (118) | 50 | 62 | Rc 1 |
Dimensions in millimetres. Values in brackets apply in the connected condition.
Legend: L = overall length; H = width across flats or outside dimension; D = socket outside diameter; A = hose barb length; C = sleeve dimension; T = thread or barb size; B = bore
Series comparison
| Series | Max working pressure | Size range | Valve structure | Applicable fluids |
|---|---|---|---|---|
| S210 CUPLA | 206 bar | 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch | Two-way shut-off | Water, Hydraulic oil, Gas |
| 210 CUPLA | 206 bar | 1/4 inch to 1 inch | Two-way shut-off | Hydraulic oil |
| HSP CUPLA | 206 bar | 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch, 1 1/4 inch, 1 1/2 inch, 2 inch | Two-way shut-off | Hydraulic oil |
| HSU CUPLA | 210 bar | Thread 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch | Two-way shut-off | Water, Hydraulic oil, Gas |
| 280 CUPLA | 315 bar | Thread 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch | Two-way shut-off | Hydraulic oil |
| 350 CUPLA | 345 bar | Thread 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch, 1 1/4 inch, 1 1/2 inch | Two-way shut-off (Spill Reduction) | Hydraulic oil |
| 450B CUPLA | 441 bar | 3/8 inch | Two-way shut-off | Hydraulic oil |
| 700R CUPLA | 686 bar | Thread 3/8 inch, 1/2 inch | Two-way shut-off | Hydraulic oil |
Choose S210 CUPLA when a line at 20.6 MPa {210 kgf/cm2} runs in a corrosive environment such as ocean development; 210 CUPLA and HYPER HSP CUPLA are rated at the same pressure and HSP CUPLA covers 14.0 to 20.6 MPa, and the argument for S210 CUPLA within that group is its SUS304 body together with the safety lock against vibration and impact. If the line calls for more pressure, the choice moves on to HSU CUPLA at 21.0 MPa, 280 CUPLA at 27.5 to 31.5 MPa, 350 CUPLA at 34.5 MPa, 450B CUPLA at 44.1 MPa or 700R CUPLA at 68.6 MPa, all of them two-way shut-off as well. For water, hydraulic oil or gas at 20.6 MPa the series covers 1/4 inch to 1 inch with FKM or NBR seals.
Body and seal materials
| Body material |
|---|
| Stainless steel (SUS304) |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Fluoro rubber (FKM), standard material | - | -20 to +180 deg C | - |
| Nitrile rubber (NBR), made-to-order item | - | -20 to +80 deg C | - |
Further catalogue data
| Note | Value |
|---|---|
| Flow direction | Fluid flow can be bi-directional when socket and plug are connected. |
| Minimum cross-sectional area (mm2) | S210-2SP: 24, S210-3SP: 47, S210-4SP: 84, S210-6SP: 153, S210-8SP: 233 |
| Admixture of air on connection (mL), may vary depending upon the usage conditions | S210-2SP: 0.8, S210-3SP: 1.6, S210-4SP: 3.2, S210-6SP: 6.3, S210-8SP: 14.3 |
| Maximum tightening torque, Nm {kgf cm} | 1/4 inch: 28 {286}, 3/8 inch: 35 {357}, 1/2 inch: 70 {714}, 3/4 inch: 100 {1020}, 1 inch: 180 {1836} |
| Accessories | The products come with dustproof caps. |
| How to lock the separation prevention mechanism (safety lock) | Slide the Lock Ring in the direction of the arrow A and rotate it in either direction simultaneously. When the Stopper is aligned with the shallow cutout on the Lock Ring, it will be locked. |
| How to unlock the separation prevention mechanism (safety lock) | Slide the Lock Ring in the direction of the arrow A and rotate it in either direction simultaneously. When the Stopper is aligned with the deeper cutout on the Lock Ring, it will be unlocked. |
| Flow rate | Flow rate - pressure loss characteristics graph on page 102. Test conditions: fluid hydraulic oil, temperature 30 deg C +/-5 deg C, fluid viscosity 32x10-6 m2/s, density 0.87x103 kg/m3. Curves printed for S210-2SP, S210-3SP, S210-4SP, S210-6SP and S210-8SP over a flow rate range of 1 to 300 L/min. |
Interchangeability and size groups
Socket and plug of different sizes cannot be connected.
Safety and application notes
- 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 101. The complete catalogue is available for download on this page.
