Quick couplings
HI Cupla 2 way type
The Nitto Kohki HI Cupla 2 Way Type is a high-performance quick coupling in steel with NBR seals, enabling bidirectional flow in pneumatic circuits. The TW series covers plugs (TW-20SH, TW-30SH, TW-40SH) and sockets in port configurations H (male thread), M (female thread), and F (flange), across nominal sizes 20, 30, and 40. The 2-way design allows air to flow in both directions without an integral check valve.
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Buying guide
How to choose HI Cupla 2 way type
What matters when choosing: properties, comparison and typical applications.
Technical features
Type overview
| Type | Nominal size | Port | Material | Seal |
|---|---|---|---|---|
| TW-20SH | 20 | H (male thread) | Steel | NBR |
| TW-30SH | 30 | H (male thread) | Steel | NBR |
| TW-40SH | 40 | H (male thread) | Steel | NBR |
| TW-20SM | 20 | M (female thread) | Steel | NBR |
| TW-30SM | 30 | M (female thread) | Steel | NBR |
| TW-40SM | 40 | M (female thread) | Steel | NBR |
| TW-20SF | 20 | F (flange) | Steel | NBR |
| TW-30SF | 30 | F (flange) | Steel | NBR |
| TW-40SF | 40 | F (flange) | Steel | NBR |
Typical applications
Typical applications: Cylinder circuits requiring air supply in both directions, pneumatic control circuits without check valves, compressed-air manifolds in factory automation, and systems with alternating flow direction in test and inspection equipment.