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Note: Actual product may be slightly different from pictured

CPBg Gear Driven Rotary Screw Air Compressor By Chicago Pneumatic

20-35hp Models with ES4000 microprocessor control, temperature protected on drive side motor bearings.


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CPBg Product Brochure
30-50HP Dimensional Drawing
Instruction Book


Horsepower: 35, 30, 25, 20hp
Sound (dBA):67
Volts: 230, 460, 208
Fuel: Electric

Dimensions & Weight

(A) Length: 52"
(B) Width: 33"
(C) Height: 61"
Weight: 1058 lbs


[ka_pvt_variation_table product_id="5588"]
Chicago Pneumatic sets a new standard in high efficiency, low noise level, and outstanding reliability with the new CPBg. These units come with a new element, a high-performance gearbox, and premium efficiency motors. The wide range of options allows you to easily customize your CPBg, while its unique design satisfies your needs in terms of user-friendliness, reliability and lifetime duration. All in all, it is the ideal screw compressor for high energy efficiency and hard working conditions.

Gear drive for high efficiency

Quiet and available with a dryer, water separator and filters, this machine can easily be installed in a compressor room or in the work place close to the air usage point. The CPBg series offers you outstanding efficiency and great reliability thanks to the new element combined with robust gearbox technology and premium efficiency motors (IE3). Add a revised lay-out, a big oil separator and coolers to that and you have a compressor that will grant you total peace of mind.

Low noise levels

The new element and gearbox combined with the deep sound insulation result in a very low sound level.

Easy & fast maintenance

Easy maintenance and very low pressure drop thanks to the new oil separation method.

Smart monitoring and control

The unique ES4000 control unit is specially programmed for energy savings. (ES4000 advanced as an option.)

Energy recovery

Recover up to 75% of the energy spent to produce compressed air improving your production efficiency.

Optional air quaility package

Our CPBg is available with dryer, water separator drain and post filter for improved quality air. (Not Included)

Standard Features

  • Low sound enclosure and pre-filtration panel with foam
  • 100 psig or lower
  • Rapid, single-panel maintenance
  • Wye-delta, reduced voltage start
  • ES4000 microprocessor control
  • Tri-voltage 208-230-460 motor
  • Independent oil and air aftercoolers
  • Temperature protection on drive side motor bearings
  • Improved long life inlet valve
  • Shipped with Rotair 2000 hour oil
  • Tank and base mount options
  • 12.2L/3.2 gal oil capacity
  • ASME and cUL approved

Intelligent Savings

The CPBg series is managed by the ES4000 Standard. This electronic control unit is programmed for energy saving operation with intelligent shutdown. The ES4000 control can be programmed to shutdown in accordance with your plant air demand and reduce long periods of unloaded operation, reducing power cost. The ES4000 control feature can save a customer hundreds of dollars per year.


  • Automatic Restart After Voltage Failure
  • I/O Expandable
  • Service Warnings
  • Remote Pressure Sensor Possible
  • Remote Monitoring

Additional information

Weight 1058 lbs
Dimensions 52 × 33 × 61 in

20, 25, 30, 35


100, 125, 150, 175


88, 84, 113, 101, 138, 130, 125, 128, 141, 158, 172

Dryer Included?

Dryer Included, without Dryer


Base Mounted (No Tank), Tank Mounted (120 Gallon)


Dual Voltage, Tri Voltage

24 Month Standard Manufacturers Warranty*

*Exclusions may apply.

-- Extended warranty may be available, consult documentation for details. --

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