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California Air Tools Ultra Quiet & Oil-Free – 4.0 HP / 20 Gal. with Sound Proof Cabinet

SKU 20040SPCAD
Original price $2,503.00 - Original price $5,441.00
Original price
$2,503.00
$2,503.00 - $5,441.00
Current price $2,503.00
Type: Standard Air – Automatic Drain
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Shipping & Handling Time For California Air Tools

Handling Time: 1-3 Business Days To Ship.

Shipping Time: 2-8 Business Days Depending On Carrier.

Our goal is to get your order to you as quickly as possible. This item ships to all States of the contiguous U.S.A (lower 48). Please note that all shipments over 100lbs go by LTL freight. For more information check out our Shipping Policy.

Cancellation/Return Policy For California Air Tools

Return Policy: California Air Tools Compressors can be returned within 30 days as long as box is unopened and condition is new. No returns accepted after 30 days.

Fees: Customer is responsible for return shipping fee and 25% restocking fee.

Any order can be canceled within 24 hours of payment.

After 24 hours, most orders will be packed and placed for pickup by the shipping carriers. Once picked up, the item will be considered shipped.

Custom, Built-To-Order, on demand products cannot be canceled or refunded after 24 hours, as these products are put into production specifically for your order. 

Damaged Items:

All orders are protected by the manufacturer's warranty. We will repair, or replace any item damaged during shipment or faulty upon arrival as long as the documentation is provided.

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4.0 HP Oil Free Air Compressor With Soundproof Cabinet

This ultra quiet 4.0 HP oil free air compressor operates at only 65 dB while supplying strong airflow from a 20 gallon steel tank. Designed for shops and garages it delivers 12.8 CFM at 40 PSI and 10.6 CFM at 90 PSI for steady tool operation.

Select models include built in air drying systems with automatic drain to reduce moisture before air reaches tools. Soundproof cabinet options help limit noise while supporting consistent pressure for spraying and pneumatic tasks.

Front view of California Air Tools ultra quiet oil-free air compressor with 20 gallon tank and sound proof cabinet

High Output Ultra Quiet Air Compressor 4.0 HP

  • Ultra Quiet Sound Levels – Operates at approximately 65 decibels across all three models, making it suitable for workspaces where reduced operating noise is required.
  • 4.0 HP Oil Free Dual Piston Pump – Twin 2.0 HP motors running at 1680 RPM deliver steady airflow while producing cleaner compressed air for tool use.
  • 20 Gallon Steel Air Tank Capacity – Provides consistent air supply for spray equipment and pneumatic tools across shop and garage applications.
  • Strong Air Delivery Output – Produces up to 12.8 CFM at 40 PSI and 10.6 CFM at 90 PSI to handle continuous air demands.
  • Moisture Reduction System Options – DSPCAD models include integrated air drying systems with aftercooler and automatic drain, offering up to 80 percent or 98 percent dry air depending on configuration.
  • Soundproof Cabinet Construction – Enclosed cabinet design helps lower perceived noise while housing gauges regulators and quick connect fittings for controlled air delivery.

Select this 4.0 HP ultra quiet air compressor series for dependable airflow reduced noise and model options that include advanced moisture control for demanding shop environments.

Interior view of a 20 gallon ultra quiet oil-free air compressor highlighting dual motor design inside sound proof cabinet

Specs of California Air Tools 20040 Series

Specification 20040SPCAD 20040DSPCAD 20040DSPCADC
Air Drying System None 80% Air Dryer Up to 98% Air Dryer Cartridge
Air Dryer Type N/A Activated Alumina Desiccant Spin On Molecular Sieve Cartridge
Dryer Service Life N/A 4000 hours Up to 2 years
Maximum Pressure 125 PSI 130 PSI 130 PSI
Noise Rating 65 dB 65 dB 65 dB
Weight 230 lbs 370 lbs 375 lbs
Dimensions L x W x H 19 x 38 x 33 in 31 x 46 x 39 in 31 x 46 x 39 in
Air Filtration Standard Standard ISO 8573 Class 2.3.1
Prefilters No No 0.01 Micron x2 + 5 Micron Regulator
Cabinet Exhaust Fans Yes Yes Yes

Shared Specs of the 4 HP 20 Gal Air Compressors

Specification Details
Horsepower 4.0 HP Rated Running
Motor Design Twin 2.0 HP Motors
Motor Speed 1680 RPM
Pump Type Oil Free Dual Piston
Tank Capacity 20 Gallon Steel Tank
Air Delivery @ 40 PSI 12.80 CFM
Air Delivery @ 90 PSI 10.60 CFM
Duty Cycle 70 30
Fill Time Empty to Full 150 Seconds
Recovery Time 40 Seconds
Voltage 220V 60Hz Single Phase
Amp Draw 14 Amps
Soundproof Cabinet Included
Pressure Gauges Dual
Quick Connect Couplers Industrial Push to Connect
Auto Drain Valve Factory Installed
Pressure Switch Condor
Thermal Protection Included
Plug Type NEMA 6 15P
Tank Certification Non ASME
Warranty 1 Year Limited

Videos of the Oil-Free Air Compressor with Sound Proof Cabinet





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