EK76-R15 Gas Powered Surface Supply Nitrox System

The Nuvair EK76-R15 is a portable, self-contained, gas powered, low pressure (LP) surface supply nitrox system capable of delivering 36% enriched air nitrox to divers. The system utilizes two LP compressors that are mounted together with a 22.1 hp Honda gas engine and a permeable nitrox membrane in a rigid aluminum frame. The system components include: back-pressure regulator, LP air filtration, gas stream temperature stabilizer (heater), permeable membrane, mixing tube, air intake filter, in-line sensor/oxygen analyzer, and compressor intake porting. All of the components are mounted to facilitate easy set-up, operation and transport. Comes with 30-gallon nitrox and air gas receivers (volume tanks) and 14-gallon fuel capacity. Delivers EANx36 @ 14 CFM (396 L/min).



  • Rigid 2 in square aluminum frame and belt guard with fork lift slots
  • Stainless steel compressor mounting plate
  • Vibration mounts below compressor plates
  • Two (2) air aftercoolers
  • LP air filtration: Hankison 3-stage Series 20 air filtration on both compressors
    - Auto drains/DP gauges
    - Coalescing 1.0 micron
    - Fine polishing .01 micron
    - Oil vapor removal .003 ppm
  • Supplying CGA Grade D air to membrane
  • Hour meter
  • Low oil shutdown
  • LP dual control head unloaders
  • Electric start
  • 12 V battery with box
  • 17 A charging system

Membrane System

  • Two (2) Pro O2 analyzers, one with in-line sensor
  • Membrane rated up to 14 CFM (396 L/min) @ 36% O2
  • Auto thermostatic control
  • Air intake filter and static mixing tube
  • Synthetic food-grade compressor lubricant for nitrox breathing applications
  • Mix accurate to within 0.1%


  • Electric - WEG 20 hp (15 kW)
  • One (1) 60 gallon gas receiver (volume tank)
  • Honda 22 hp (16.4 kW) gas engine with electric start
  • Low/high O2% shutdown and alarm
  • Pro CO analyzer with alarm and shutdown
  • Pro CO2 analyzer with alarm


Engine Honda Gas
Engine Power 22.1 hp
Maximum Operating Pressure 175 psi (12 bar)
EK76 Air: 42 CFM @ 175 psi
(1189 L/min)
Champion R15 Air: 14 CFM @ 175 psi
(396 L/min)
Combined Production Air: 56 CFM @ 175 psi
(1585 L/min) 
Nitrox Produced EANx36: 14 CFM @ 175 psi
(396 L/min)
Air Tank Two (2) 30 gal steel gas receivers
Fuel Tank 14 gal
Lubrication EK76: Pressure
R15: Splash
Air Quality CGA Grade D
(L x W x H)
76 x 38 x 66 in
(193 x 97 x 168 cm)
Weight 1400 lb (636 kg)