MCH22 Diesel Open Horizontal

Nuvair set out to develop a flagship commercial continuous-duty, high pressure compressor when we came up with the open horizontal models. These packages are built around the Coltri MCH22 pumping unit and can deliver up to 15.8 SCFM (447 L/min) at up to 6000 psi (414 bar).


The Nuvair commercial compressor series uses the Coltri 4-stage compressor block made from top quality materials: Connecting rods from aluminum alloy, stainless steel intercoolers and aftercoolers, and cylinders of special cast iron. The Coltri compressor block and a Kohler diesel are mounted on a steel plate that is placed into a marine grade, aluminum frame with a belt guard that can be left raw or powder-coated. Bottom drip pan and four-point lifting eyes round out the package. All packages come with an electric start, 60,000 cu ft of Grade E filtration, auto condensate drains, tach/hour meter, loadless start, independent vibration isolators, 9-gallon fuel tank, and an enclosed drip pan. These packages are built for continuous use and heavy-duty durability.


  • Grade E breathing air filtration
  • Dual filter filtration (60,000 cu ft)
  • Interstage pressure gauges
  • Low oil shutdown
  • Automatic condensate drains
  • High temperature shutdown
  • Hour meter
  • Two (2) fill whips
  • Diesel engine
  • Stainless steel intercoolers
  • Electric start and 12-volt battery with box
  • Visual CO and moisture indictator
  • Lifting eyes


  • Water cooling [ More Information ]
  • 7000 psi (482 bar) pressure
  • Stainless steel frame
  • Steel frame
  • Powder-coated blue paint
  • Auto pressure shutdown
  • Audible and visual CO and high temperature alarm with shutdown
  • Filtration upgrade (90,000 cu ft)
  • Certified lifting eyes
  • Large base mount fuel tank
  • Remote fill panel
  • Yanmar diesel or Hatz diesel


Model Open Horizontal MCH22D
Fill Time* Approx 5 minutes
Charging Rate* 15.8 SCFM (447 L/min)
CFM FAD 13.2 CFM (374 L/min)
Engine Make
and Model
Kohler 19 hp (14 kW)
SKU: 8046-DL
RPM 3600
Max Operating Pressure 6000 psi (414 bar)
Number of Stages 4
Number of Fill Hoses 2
Condensate Drain Auto Drains
(L x W x H)
64 x 32 x 44 in
(163 x 81 x 112 cm)
Weight 760 lb (345 kg)
Lubrication Gear Driven Oil Pump lubrication, capacity 4.5 qt
Air Quality DIN 3188 - CGA Grade E - NFPA 1500 - EN12021

*Based on 80 cu ft tank from 500 to 3000 psi.