The NK range is a modular tankless PM VSD screw — the air end, permanent-magnet motor, and inverter packaged into a freestanding cabinet, designed to tie into an external receiver and downstream filtration that the customer specifies. Distributors and integrators choose the NK when they're building a custom shop layout: existing receiver, oversized dryer, cascading compressors, or non-standard tank sizing.
The 3 HP and 5.5 HP units are supplied in 220V single-phase configuration; 7.5 HP and above ship as 380V three-phase. Maximum working pressure is 10 bar (1.0 MPa). Acoustic damping holds full-load noise around 65 dB(A).
Same AS1210-certified pressure vessel and same PM VSD electronics as the cabinet range — only the on-board receiver and dryer are removed.

Every model in NK ships with these baseline features. Per-model differences live on each model page.
| Model | Power | Flow | Pressure | Configuration | Tag | |
|---|---|---|---|---|---|---|
NK-3PV | 3 HP / 2.2 kW | 0.26 m³/min | 1 MPa | Tankless | Quote | |
NK-5.5PV | 5.5 HP / 4.1 kW | 0.4 m³/min | 1 MPa | Tankless | Quote | |
NK-7.5PV | 7.5 HP / 5.6 kW | 0.66 m³/min | 1 MPa | Tankless | Popular | View |
NK-10PV | 10 HP / 7.5 kW | 1 m³/min | 1 MPa | Tankless | Popular | View |
NK-15PV | 15 HP / 11.2 kW | 1.45 m³/min | 1 MPa | Tankless | Quote | |
NK-20PV | 20 HP / 14.9 kW | 2 m³/min | 1 MPa | Tankless | Quote |
One contact in Shanghai, one balanced container quote, one datasheet your regulator can sign off on.