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Item # D90KA, Rotair® D90KA Ultra Silent Portable Diesel Air Compressor

Building World Class Air Compressors Since 1961

The new Rotair® D90KA is an ultra-compact 90 cfm portable compressor that will efficiently power a single 90 pound breaker, or blow out a sprinkler system as well as any 185 cfm compressor on the market. The new D90KA is powered by a 3-Cylinder Kubota Tier 4 Final diesel engine that is designed to provide years of quiet, reliable and fuel-efficient service. For years, customers have been purchasing and renting 185 cfm compressors to run a single pneumatic tool, or to do jobs that could actually be handled as well by a 90 cfm machine. The Rotair® D90KA offers many advantages when compared to a larger, and more expensive, 185 cfm compressor.

Compressor Specifications  · Engine Specifications  · General Specifications and Dimensions  · Additional Description  · Features & Benefits  · Note

Compressor Specifications

Free Air Delivery

90 ft³/min

Working Pressure

100 psi

Air Outlets

3/4 in. x 2

Air End Type

Elgi Axis 102 Twin Rotary Screw

Air End Operating Speed (Shaft)

3867 rpm

Idle Speed

1900 rpm

Air Intake Filtering

Single-Stage Dry

Separator Filter


Engine Specifications

Diesel Engine Model

Kubota D1105-E4B

EPA Tier

Tier 4 Final

Number of Cylinders



1.1 L



Injection System




Engine Oil Capacity

4 L

Air Intake System

Two-Stage Dry

Horsepower @ 2900 rpm

25.2 hp

Average Fuel Consumption @ 60%

0.92 gal/h

General Specifications and Dimensions

Fuel Tank Capacity

10.5 gal

Axle Type

Heavy-Duty Rubberized Torsion Bar

Drawbar Type

Square Tube Straight Steel

Hitch Type

Adjustable Ball or Pintle Eye


Corrosion Proof Flex-Edge®

Trailer Lighting

Recessed Press-In


Stainless Steel Lockable


Stainless Steel


All-Steel Clamshell (Full Access)

Electrical Connection

Heavy-Duty RV Type

Length without Drawbar

58 in

Length with Drawbar

102 in


55 in


49 in

Dry Weight

1190 lb


Five-Year, Unlimited Hour Air-End Warranty

Additional Description
The D90K costs about 35%-40% less than the typical 185 cfm compressor. It is also more compact, and easier to tow with today's smaller, more fuel-efficient vehicles. That also makes it easy to position on jobsites. In fact, it can be deployed in tight areas by one operator, without the use of the tow vehicle. So, it is friendlier to vulnerable turf and landscaping. The Rotair® D90KA also costs about 30% less to operate, when compared to the average 185 cfm product. The Rotair® D90KA provides features not found on competitive products. Despite its small size, the D90K offers unparalleled accessibility for service, and can be turned around quickly in a rental operation. Other features include curb-side controls for operator safety, Flex-Edge fenders for greater durability, recessed running lights for less frequent replacement and a heavy duty running-gear package that includes a torsion axle and square-tube drawbar with adjustable hitch height. Rotair®'s quality is also well spoken for as the Rotair® D90KA carries a free, 5-Year, Unlimited-Hour warranty on the Air-End. For the greatest combination of quietness, reliability, ease of service, fuel efficiency and overall value, check out the new D90KA from Rotair®.

Rotair®'s new D90K is the latest Rotair® Portable Air Compressor to be conceived and designed in the U.S. by rental professionals with over 100 combined years of industry experience.

In an age where most portable compressors are rented to power only a single air tool, or blow out a sprinkler system, why invest up to 35% more on acquisition and use 25%-35% more fuel to power a multi-tool compressor that will be utilized far below its potential. The Rotair® D90K will do 95% of the jobs 185 cfm compressors are typically asked to do. And, you can offer your customers lower rental rates and still enjoy a greater return on investment. That's a combination everyone can take to the bank.

For added peace of mind, Rotair® provides a FREE, Five-Year, Unlimited-Hour Warranty that covers the entire Air-End. When your hard-earned money is on the line, what good is a "traditional brand name" that may be nothing more than an image from the past. Rotair® Compressors are the new choice for today’s rental market.

Features & Benefits
  • 90 ft³/min @ 100 psi
  • EPA Tier 4 Final
  • Designed in the U.S. by Rental Professionals
  • New quiet Kubota D1105-E4B diesel engine provides reliable, smooth and efficient power
  • Ultra Silent design provides industry-leading quietness
  • Curb-Side Mounted Control Panel provides convenient operation and maximum operator safety
  • Open-Canopy Design and Spin-On Compressor Oil Filters for ease of maintenance
  • Galvanized, Flex-Edge® Fenders ensure the ultimate in strength, durability and resilience
  • Automatic Glow Plug System provides for easy starts in cold weather
  • Minimum Pressure Check Valve on air outputs prevents back-feeding of solids and liquids
  • Heavy-Duty Running Gear with Torsion Axle and Square-Tube Drawbar provide longer economic life
  • Concealed and Balanced Lifting Eye for safe placement of compressor
  • Easily Replaceable Push-In Running Lights
  • Compact Size for easy handling and storage
  • Efficient weight allows towing with almost any vehicle

Specify Ball or Pintle Eye Hitch.


·  Rotair® D90KA Ultra Silent Portable Diesel Air Compressor - 4

·  D90KA 1

·  D90KA 2

·  D90KA 3

·  D90KA 4