4 HP Industrial Rotary Screw Compressors

kaeser compressors 4 hp rotary screw air compressors

Kaeser's 4 HP Screw Compressor Models

Standard 4 HP Air Compressor

SX 4 - 4 hp screw compressor

Kaeser's standard SX 4 hp screw compressor model, offers impressive performance and quiet operation. It features a robust design with super-silenced, vibration-dampening, and powder-coated panels, suitable for ambient temperatures up to +115 °F. The unit is equipped with an IE3 premium efficiency motor (IP 54) and an innovative dual-flow fan with separate airflow channels for efficient cooling of the motor, fluid/compressed air cooler, and control cabinet. Key fluid and airflow features include a 'Honeycomb' air intake filter, pneumatic inlet and venting valves, a triple-separation system in the cooling fluid separator tank, and comprehensive pressure and fluid management components.

4 HP Air Compressor with an Integrated Dryer

SX 4T - 4 hp screw compressor with dryer

The SX 4T is a rotary screw compressor with integrated refrigerated dryers sized for the full flow of the compressor. The dryer is located in a separate cabinet so it is not exposed to preheated air or contaminants from the compressor package.

Energy-Saving Control:

The integrated refrigerated dryer in "T” units provides high efficiency performance thanks to its energy saving control. The dryer is active only when compressed air actually needs to be dried. This approach achieves the required compressed air quality with maximum efficiency.

Eco-Drain:

The integrated refrigerated dryer also features a zero loss Eco-Drain. The advanced level-controlled condensate drain eliminates the compressed air losses associated with solenoid valve control. This saves energy and considerably enhances the reliability of the compressed air supply.

Climate-Friendly Design:

In addition to energy-saving controls, our integrated dryers feature the new R-513A refrigerant with 56% lower global warming potential than common dryer refrigerants. Combined with our advanced heat exchanger design, we need only half the refrigerant — resulting in the most climate-friendly dryer possible.

 
 

4HP AIRCENTER: A Complete Compressed Air System

kaeser aircenter compressed air system

To simplify your compressed air system, KAESER offers the AIRCENTER. This unit combines essential compressed air system components in one easy-to-install package. AIRCENTERS come completely assembled and include a refrigerated dryer with automatic condensate drain, receiver tank, and an optional filtration package. These super quiet and energy efficient units are compact and perfect for installations where space is limited. Learn about AIRCENTER compressed air packages here.

 
 

AIRTOWER 4C: A Compact Footprint 4HP Compressed Air Package

kaeser airtower compact air compressor system package

The AIRTOWER™ is an affordable, yet rugged rotary screw compressor package for any light industrial application including woodworking, machine shops, metal fabrication, and all sorts of vehicle maintenance and repair. Available in 3, 4, 5, and 7.5 hp, the AIRTOWER delivers reliability, energy efficiency, and easy maintenance. The all-in-one package includes a rotary screw compressor, dryer, tank, and drain in a compact, space-saving design that arrives fully assembled and ready to run. Learn more about AIRTOWER compressed air packages here.

 
 

TECHNICAL SPECIFICATIONS

4 hp Screw Compressors: SX Series
kaeser compressors 4 hp rotary screw air compressors
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
SX 4 15.9 12.7 8.8 23 x 25 x 38 309 62
SX 4T 23 x 36 x 38 408
SX 4 AIRCENTER 23 x 43 x 62 628
  • Super silenced with vibration-dampening
  • All panels powder-coated
  • For ambient temperatures up to +115 °F
  • IE 3 premium efficiency motor
  • IP 54
  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler
4 hp Screw Compressors: AIRTOWER
Model Flow (cfm) Dimensions W x D x H (in) Weight (lb) Noise level (dB(A))
125 psig 160 psig 217 psig
AIRTOWER 4C 15.9 12.7 8.8 24 x 39 x 58 628 70
 
  • Super silenced with vibration-dampening
  • All panels powder-coated
  • For ambient temperatures up to +115 °F
  • IE 3 premium efficiency motor
  • IP 54
  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler

AIRTOWER Components

SXC component layout
  1. Air filter
  2. Airend
  3. Drive motor
  4. Automatic belt tensioning
  5. Fluid separator tank
  6. Cooler
  7. Air receiver
  8. ECO DRAIN condensate drain
  9. Refrigerated dryer
  10. Compressed air outlet
  11. Control valve
 
 

Why Choose a KAESER 4 HP Rotary Screw Compressor?

Kaeser's 4-hp rotary screw air compressors provide outstanding efficiency and reliability. Featuring an energy-saving SIGMA PROFILE airend and a SIGMA CONTROL 2 controller, these compressors are designed to meet and exceed our customers' expectations, outperforming and outlasting other compressor solutions on the market.

Service-Friendly Compressor Design

From the ground up, these compressors have been designed with the user in mind. Fewer wearing parts and using premium quality materials ensure reduced maintenance requirements, longer service intervals, and extended service life. A smart component layout with generously sized maintenance doors simplifies service and reduces downtime.

Guaranteed Efficiency

In our systems design approach, KAESER chooses the components that work together in the most energy efficient way possible. Each and every component — from inlet filter to discharge connection — has been carefully designed with performance in mind. In fact, the S series are up to 30% more efficient than the competition. With KAESER’s superior system controls, we guarantee an effective system with lower operating costs.

Rugged Reliability

KAESER’s screw compressors meet our rigorous “built for a lifetime” standard. Designed and built with KAESER’s generations of compressed air experience, you can rest assured that these 4 hp compressors will continue to deliver the air you need with the exceptional reliability you expect from a KAESER COMPRESSOR.

SIGMA Control 2: An Intelligent Compressor Control System

SIGMA CONTROL 2 compressor controller
  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display with 30 selectable languages 
  • Soft-touch icon buttons 
  • Fully-automatic monitoring and control
  • Dual, Quadro, Vario and Mono control modes available as standard 
  • Interfaces: Ethernet 
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet 
  • SD card slot for data logging and updates 
  • RFID reader 
  • Web server

Contact KAESER For Your Compressed Air Questions

kaeser compressors representatives help to answer any compressed air questions

Whether you have simple questions regarding your compressed air requirements or require custom solutions, our team is always available to answer your questions.

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