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.
One contact in Shanghai, one balanced container quote, one datasheet your regulator can sign off on.