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Nx Series 4-15 kW


With a compact design and robust power, the Nx’s smooth operation is built to last, making it ideal for a wide variety of industries from auto body shops to heavy industrial work.

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High-Performance, Legendary Reliability

Stable air pressure, steady airflow, and quieter, continuous-duty operation are just a few of the advantages you get with FS-Curtis rotary screw compressors. Intuitive controls and diagnostics make them easy to use and service, too. It all adds up to an extremely reliable machine that can run 100% continuous duty, delivering more airflow and better efficiency in a space-saving design — making the Nx Series ideal for a variety of applications that require reliable performance in demanding conditions.

 Nx 4-15 kW Features


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 prolonging 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 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 money integrated into a smaller footprint
  • Exclusive FS-Curtis airends utilize the latest rotor profile to maximize efficiency
  • Airends are manufactured at the ISO 9001:2015 certified, FS-Curtis headquarters office in Saint Louis, Missouri USA


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

NxGEN Warranty

Comp-Air Service Co. backs the Nx products with first in industry extended warranty. The major components such as electric motor, separator tank, air/oil cooler and VFD/controller are covered by a full non-prorated 5 year and our airends are covered for a full 10 year of peace of mind coverage.

Since 1854, the legacy at FS-Curtis is to build durable and long lasting products. Since we believe in what we manufacture, we back our products with an unprecedented, long standing, best warranty in the industry.

The Nx Series with iCommand Touch Controller was awarded the Gold Award for the 2015 Plant Engineering Product of the Year Compressed Air

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