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
| Feature | Specification |
| Motor | 4.0 HP (Total) |
| Noise Level | 75 Decibels |
| Airflow (CFM) | 12.80 CFM @ 40 PSI / 10.60 CFM @ 90 PSI |
| Max Pressure | 125 PSI |
| Tank Capacity | 20.0 Gallon |
| Air Dryer | Integrated Aftercooler & Dryer (80 or 98% Dry Air) |
| Pump Life | 4,000+ Hours |
| Power Requirements | 220V / 60Hz |
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.
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