California Air Tools 4HP SMART® Ultra Quiet Oil-Free 20 Gal Air Compressor

4HP SMART® Ultra Quiet Oil-Free 20 Gal Air Compressor Available 80-98% Air Dyer, AfterCooler & Auto Drain

Professional Ultra Quiet & Oil-Free 4.0 HP Air Compressor

20-Gallon Tank | 80-98% Integrated Air Dryer

Models

20040SM | 20040DSMAD | 20040DSMADC

When your operations demand high-volume airflow without the industrial roar, the 4.0 HP 20-Gallon Soundproof Cabinet Compressor delivers. This powerhouse is designed for high-traffic environments—such as multi-chair dental offices, large medical labs, and precision manufacturing shops—where constant, clean, and dry air is mission-critical.

By combining a high-output 4.0 HP motor with an elite sound-suppression cabinet, this unit provides the performance of a shop compressor with the noise level of a quiet office environment (55–58 dB).

Superior Features & Benefits

• Integrated High-Efficiency Air Dryer: Equipped with an advanced aftercooler and air dryer system that removes up to 80% of moisture from the air. This ensures that your pneumatic instruments stay dry, prevents rust in your tools, and eliminates water contamination in sensitive applications.
• Acoustic Steel Cabinet: The heavy-duty steel enclosure is lined with professional-grade sound-absorbing foam. It features a triple-fan cooling system to ensure that despite being enclosed, the motors maintain a low operating temperature for a 100% duty cycle.
• Dual 2.0 HP Power System: Utilizing two separate 2.0 HP oil-free motors, this unit offers redundancy and massive airflow. The dual-piston pumps are rated for a 4,000+ hour life cycle, significantly outlasting standard commercial units.
• Clean & Oil-Free: 100% oil-free operation means zero risk of oil mist entering your air stream or workspace, making it safe for food-grade, medical, and clean-room environments.
• High-Capacity 20-Gallon Reserve: The large 20-gallon tank reduces motor “short-cycling,” providing a steady, consistent pressure flow for high-demand tools and machinery.

Technical Specifications

Includes MDR2i OLED Smart Controller for remote monitoring and control

• Programmable ON/OFF Times
• Pressure ON Level (i.e. re-start pressure)
• Pressure OFF Level (i.e. shutdown pressure)
• Unloader Relay Delay: Delay time for activation of the unloader valves during compressor start-up (load reduction).
• AutoDrain Time: Select the time between each drain activation.
• Drain Valve Time:  AutoDrain valve opening duration.
• Overcurrent Limit: (i.e. functions as an electrical trip/breaker).
• Pressure Units: Select [bar] or [PSI]
• Total Active (Motor-Pump) Running Hours

Primary Applications

• Multi-User Dental/Medical Suites: Supports 4–6 chairs simultaneously with medical-grade air quality.
• Precision CNC & Laser Shops: Provides the consistent, dry air required for sensitive lens cooling and pneumatic actuators.
• Commercial Printing & Painting: Ensures moisture-free air for flawless finishes and high-speed pneumatic paper feeders.