Nitto Kohki
Medium Pressure up to 75 bar
The Nitto Kohki medium-pressure series bridge the gap between compressed-air and high-pressure hydraulics, covering operating pressures up to 75 bar (7.5 MPa). The TSP and SP series are non-spill couplings with double- or single-side shut-off - ideal for nitrogen, CO₂, industrial gases, hydraulic oil and coolants where leakage and air inclusion must be avoided.
The pressure-relieved sleeve mechanism allows connection even under residual pressure, while the double-valve design of the TSP Cupla keeps both medium and system fully closed on disconnection. Steel and stainless-steel SUS 316 bodies with FKM/NBR seals are designed for demanding media and temperatures.
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Buying guide
How to choose Medium Pressure up to 75 bar
What matters when choosing: properties, comparison and typical applications.
Technical advantages - medium-pressure Cupla at a glance
Medium-pressure couplings - Nitto Kohki vs. Parker vs. Stäubli vs. Rectus
| Criterion | Nitto Kohki | Parker | Stäubli | Rectus |
|---|---|---|---|---|
| Max. working pressure | up to 7.5 MPa (75 bar) | approx. 6.3 MPa | approx. 5-6 MPa | approx. 5 MPa |
| Non-spill technology | Yes (TSP/Zero Spill) | Yes | Yes (CBI) | Partial |
| Double-side shut-off | Yes (TSP Cupla) | Yes | Yes | Limited |
| Integrated ball valve | Yes (TSP-BV) | Rare | No | No |
| Body materials | Steel/SUS 316 | Steel/brass | Stainless | Steel/brass |
| Gas / inert-gas suitability | Yes, N₂ / CO₂ | Yes | Yes | Partial |
Product overview & typical applications
| Series | Application | Pressure / spec | Key feature |
|---|---|---|---|
| TSP Cupla | gas, oil, coolant | up to 7 MPa | valved both ends, non-spill |
| Zero Spill Cupla | sensitive/expensive media | up to 7 MPa | minimal media loss on disconnect |
| SP Cupla Type A | hydraulics, gas lines | up to 7 MPa | single-side valve |
| TSP-BV Cupla | maintenance, transport safety | up to 7 MPa | integrated ball valve, lockable |
Typical applications: nitrogen and CO₂ supply, hydraulic test benches and clamping hydraulics, cooling and tempering circuits, industrial-gas distribution, and systems requiring non-spill disconnection and inert-gas tightness (e.g. food, beverage and laboratory applications).