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Rotary Screw Air Compressors - FSCurtis

Nx Series 4-37kW

Small in size, big on power. The Nx 4-37kW is commendable for it’s smooth & quiet execution. This model is extremely dependable for a variety of jobs, stretching from auto body shops to manufacturing.


The FS-Curtis rotary screw compressors are just what you need. With their steady & quiet airflow, stable air pressure & continuous-duty operations, you’ll find them easy to use & service. The smart compressors offer better air quality than some other oil carryover models, & their compact size is a plus too.  An extremely reliable machine, it provides 100% continuous duty, delivering more airflow & better efficiency through it’s space-saving design. The Nx Series is a great fit for automotive & industrial applications.


Designed for quiet operation.

  • Integration of centrifugal blower and drive motors make for extremely smooth and quiet operation
  • Extra-thick sound insulation reduces noise
  • Can be installed in applications where a quiet setting is important


The ultimate in system protection and reliability.

  • Protects critical components from compressor-generated heat
  • Extends component life and reduces downtime
  • Compartmentalized air flow design and standard aftercooler


Built to the highest levels of dependability and reliability.

  • Standard TEFC motor protects compressor from surrounding dirty air, increasing the efficiency and proloning the life of the motor.
  • Spin-on air/oil separator allows for quick maintenance and results in one-to-three PPM oil carryover. This translates into lower maek-oup oil costs and higher quality compressor air. This
    translates into lower make-up oil costs and higher quality compressed air.


Designed for low cost of ownership and easy service.

  • Space-saving design
  • Pulsation-free air
  • 100% continuous duty
  • Extended service intervals
  • More CFM per horsepower
  • Improved air quality
  • Energy efficiency at full load delivers more air for the mone integrated into a smaller footprint
  • Exclusive FS-Curtis airends utilize the latest rotor profile to maximize efficiency


Ideal combination of variable speed drive, controller, and drivetrain.

  • The VSD – time proven directly coupled design – offers faster response and greater operational efficiency
  • Variable operation slows airend speed, which lowers energy costs and reduces wear
  • With DemandSmart technology, the VSD enhances quality by stabilizing air pressure at 1 psi increments
  • Built-in DC Choke protects against harmonic disturbances and eliminates the need to source additional corrective devices
  • iCommand Controller is intuitive and easy to use while precisely delivering compressed air usage


Ideally sized prefilter and integrated refrigerated dryer.

  • Saves floor space and reduces wasted time and installation cost