Screw Technology
Rotary Screw Compressors
Oil-injected rotary screw compressors engineered for continuous industrial operation. From 3 HP to 430 HP, in fixed and variable speed configurations — all designed and manufactured in Italy.
Power Range
3 – 430 HP
Speed Control
Fixed & Variable (VSD)
Lubrication
Oil-injected
Drive
Belt & Direct-driven
Manufacturing
Since the 1990s
Quality Control
100% tested pre-shipment
Built in Italy. Tested to Perform.
NUAIR has been designing and manufacturing rotary screw air-ends and their constituent components in its Italian production facilities since the 1990s. This depth of in-house capability — covering machining, assembly, and testing — means every design decision is grounded in manufacturing reality, not just engineering theory.
The result is a screw compressor range that covers 3 to 430 HP, available in both fixed-speed and variable-speed drive (VSD) configurations. Variable speed models adapt motor RPM to actual air demand, eliminating the energy waste of constant-speed systems when load fluctuates.
3 – 430 HP
Full power range covered by a single integrated product family, with consistent engineering standards from the smallest to the largest unit.
100% Tested
Every unit is individually tested under real operating conditions before shipment. No batch sampling, no statistical approximation — every compressor is verified.
Since the 1990s
In-house screw air-end manufacturing in Italy, accumulating process knowledge that continuously informs design improvements.
Engineering Principles
The technical decisions that define NUAIR screw compressor performance.
Four-Phase Machining
Each air-end undergoes four distinct machining phases with undifferentiated rotor coupling. This precision approach ensures dimensional consistency across every unit leaving the factory.
CAD-Optimised Layout
Component arrangement within each unit is engineered through CAD simulation to optimise airflow paths, heat dissipation, and serviceability — reducing energy loss and simplifying maintenance.
30+ Years of Expertise
NUAIR has been manufacturing screw air-ends and their constituent components in Italian facilities since the 1990s, accumulating process knowledge that shapes every design iteration.
100% Tested
Every screw compressor unit is fully tested before it leaves the factory. No unit reaches the market without passing performance, pressure, and leak verification under real operating conditions.
Full Traceability
Complete component and assembly traceability is maintained throughout production. Each unit can be traced back through its full manufacturing history, supporting warranty and service processes.
Precision Manufacturing
Four machining phases. Undifferentiated coupling.
Each rotor undergoes four distinct CNC machining phases. The result is dimensional accuracy that allows undifferentiated coupling — any male rotor can be paired with any female rotor without selective assembly or manual fitting.
Ready to see the product range?
Browse the full NUAIR screw compressor catalog with specifications, models, and accessories.