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OFD1550 Tier 4 Final Oil Free Rotary Screw Air Compressor


The Sullair OFD1550 Tier 4 Final air compressor is built for long-lasting performance and brings Class 0 Oil Free Air directly where it is needed — plantside, refineryside — and jobsite!

The OFD1550  provides 100% Class 0 Oil Free Air in a package designed for both short-term and longer-term usage and key features including: 

  • State-of-the-art 7˝color Sullair Touch Screen Controller (STS) 
  • Ability to operate in temperatures ranging from -20°F to 115°F
  • High altitude capability (up to 12,000 ft above sea level)

Models vary by region. Please contact your Sullair sales representative for more details.

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Specs Contact Us


1550 cfm
48.89 m³/min


125 psi
8.62 bar


550 hp
410 kw

Proven and Durable Package

  • Legendary Sullair Dry Screw Two-Stage Air End featuring:
    • High efficiency asymmetrical profile rotors
      • Coated with FDA-approved food-grade PTFE to resist corrosion
      • Timing gear controlled rotor clearances for extended rotor life
      • High-precision bearings with consistent lubrication for improved machine life
  • 110% fluid containment frame
  • Galvannealed steel enclosure
  • Multiple lockable service doors provide easy access to virtually all service items

Powerful Cummins 15l Diesel Engine

  • Meets EPA Tier 4 Final emissions standards
  • Xtra-High Pressure Injection (XPI) Fuel System helps increase fuel economy and performance while decreasing exhaust emissions

1550 cfm at 125 psi with adjustable pressure from 70 to 150 psi

Compact Design

  • Site-towable with steerable front axle
  • Non-pneumatic tires cover even rough terrain and never go flat
  • Forklift pockets standard for ease of transport
  • Lift bail provides fixed point for overhead lifting
  • Pivoting drawbar allows two-machine loadability on standard flatbed semi trailer

Optimum Performance

  • Innovative package design for excellent air flow
  • Engineered to provide maximum cooling efficiency
  • Patent-pending hydraulically actuated inlet valve specifically designed to operate even in extreme temperatures

Ready for Jobsite and Extended Duty Uses

  • 250-gallon onboard fuel system provides 10-hours plus runtime
  • Easy-operation valve to connect an external fuel source for extended duty runtime
  • Two-step gear box for optimized pressure ratios and optimal fuel efficiency

7˝ Color Sullair Touch Screen Controller

  • In-depth compressor and engine performance information on demand
  • Rugged touch screen works even when wearing gloves
  • User access passcode
  • Engine jog feature for extended storage periods

AirLinx® — a Telematics Solution Providing:

  • GPS to keep track of your units via Internet-connected devices
  • Fleet management
  • Remote monitoring and troubleshooting capabilities

Safety Features

  • Air shut-off for overspeed protection
  • Spark Arrestor (DPF) for fire safety

Extras included in Standard Configuration

  • Refinery Package
    • Including 110% fluid containment, anti-static belt, non-metallic fan, engine air shut-off valve
  • Cold Weather Package to -20°F /-29°C
    • Includes heavy-duty batteries, 0W40 engine oil, battery heaters, sump oil heater, ether-assisted start, automatic electro-mechanically controlled louvers


  • Actual Delivery cfm (m³/min): 1550 (43.89)
  • Rated Pressure psig (bar): 125 (8.62) 
  • Pressure Range, max/min psig (bar): 150(10.3) / 70 (4.8)
  • Service Valves, main/auxiliary: 1 (3" NPT) / 1 (1" NPT) 
  • Operating Ambient Temperarture, max, min °F (°C): 115 (46) / -20 (-29)
  • Maximum Operating Altitude ft (m): 12,000 (3657)
  • Fuel Consumption Full Load at 125 psi gal/h (l/h): 20.9 (79.2)
  • Comp. Discharge Shutdown Temperature °F (°C): 450 (232)
  • Maximum Operating Tilt: 15°
  • Sound Level (U.S. EPA) dbA: 76

Weights & Dimensions


  • Working weight lbs (kg): 20,955 (9505)
  • Dry weight lbs (kg): 18,140 (8228)
  • Length in (mm): 251 (6375)
  • Width in (mm): 88 (2235)
  • Height in (mm): 101 (2565)


  • Make (Emissions Level): Cummins QSX15 Diesel (T4F)
  • Displacement in³ (l): 912 (14.9)
  • Cylinders: 6
  • Bore x Stroke in (mm): 5.4 x 6.7 (137 x 169)
  • Operating Speed rpm: 1840
  • Minimum Idle Speed rpm: 1400
  • Fuel Tank Capacity gal (l): 250 (946)
  • DEF Capacity gal (l): 15 (57)