High-Pressure up to 700 Bar
280 Cupla
The Nitto Kohki 280 Cupla is a high-pressure quick-release coupling in steel with NBR seals, rated for operating pressures up to 700 bar. The range includes plugs (280-xP) and sockets (280-xS) in nominal sizes 2, 3, 4, 6, and 8. Unlike the 350 Cupla (FKM seal), the 280 Cupla uses NBR seals, making it particularly suitable for mineral oil hydraulic media and water-containing hydraulic fluids.
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Buying guide
How to choose 280 Cupla
What matters when choosing: properties, comparison and typical applications.
Technical features
280 Cupla type overview
| Type | Role | Nominal size | Material | Seal |
|---|---|---|---|---|
| 280-2P / 280-2S | Plug / Socket | 2 | Steel | NBR |
| 280-3P / 280-3S | Plug / Socket | 3 | Steel | NBR |
| 280-4P / 280-4S | Plug / Socket | 4 | Steel | NBR |
| 280-6P / 280-6S | Plug / Socket | 6 | Steel | NBR |
| 280-8P / 280-8S | Plug / Socket | 8 | Steel | NBR |
Typical applications
Typical applications: High-pressure hydraulic connections in machine tools and presses, hydraulic power unit connections with mineral oils (HLP) and water-mixed fluids (HFA, HFB), quick-change systems on heavy and construction machinery, and high-pressure test systems and mobile hydraulics up to 700 bar.