High-Pressure up to 700 Bar
350 Cupla
The Nitto Kohki 350 Cupla is a high-pressure quick-release coupling in steel with FKM seals, rated for operating pressures up to 700 bar. The range includes plugs (350-xP) and sockets (350-xS) in nominal sizes 2 through 12, as well as flange variants (e.g., 350-3P-3G, 350-4P-4G) enabling direct block mounting without loose pipe fittings. FKM seals provide resistance to mineral oils, synthetic hydraulic fluids, and elevated operating temperatures.
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Buying guide
How to choose 350 Cupla
What matters when choosing: properties, comparison and typical applications.
Technical features
Series and flange types
| Type | Nominal size | Version | Material | Seal |
|---|---|---|---|---|
| 350-2P / 350-2S | 2 | Standard | Steel | FKM |
| 350-3P / 350-3S | 3 | Standard | Steel | FKM |
| 350-4P / 350-4S | 4 | Standard | Steel | FKM |
| 350-6P / 350-6S | 6 | Standard | Steel | FKM |
| 350-3P-3G | 3 | Flange | Steel | FKM |
| 350-4P-4G | 4 | Flange | Steel | FKM |
| 350-6P-6G | 6 | Flange | Steel | FKM |
| 350-8P-8G | 8 | Flange | Steel | FKM |
Typical applications
Typical applications: Hydraulic test rigs and test facilities with operating pressures up to 700 bar, hydraulic power unit connections in heavy engineering and press installations, high-pressure lubrication systems, offshore hydraulics, and machine-tool couplings with direct block mounting via the flange variants.