Air Compressor SP Series Ultra Quiet & Oil Free 4-HP 20-Gallon (4 User)

Introducing the California Air Tools SP Series Ultra Quiet & Oil Free 4-HP 20-Gallon Steel Tank Air Compressor with Dryer, Auto Drain & Sound Proof Cabinet. Built for demanding workshops, this unit blends high performance with exceptionally low noise, delivering clean, dry air for sensitive tools and equipment.

Ultra-quiet, oil-free performance

• 65 decibels sound level makes it one of the quietest 4.0 HP compressors in its class, so your workspace stays peaceful while you work.
• Oil-free dual-piston pump system designed for reduced maintenance and cleaner air, helping you avoid oil contamination in tools and finishes.
• Two 2.0 HP motors run at just 1680 RPM, delivering steady power with less noise and wear for longer life.

Dry air, better protection for your tools

• Integrated Air Drying System removes up to 98% of water vapor, protecting sensitive equipment and improving performance in varied environments.
• Aftercooler cools discharge air, and a replaceable Spin-On Air Dryer Cartridge uses a regenerating high-temperature molecular sieve desiccant for reliable drying.
• ISO 8573 - Class 2.3.1 air quality ensures clean, dry air for precision tools and equipment.

Designed for durability and convenience

• 20-gallon steel tank housed in a sturdy, soundproof cabinet with acoustic foam insulation to reduce vibration and noise.
• Four exhaust fans actively move air through the cabinet for cooler operation and extended compressor life.
• Built-in EZ-1 Automatic Drain Valve eliminates manual tank draining, with adjustable timing for consistent moisture removal.
• Casters provide easy mobility around the workshop, making it simple to position where you work most.

Performance you can rely on

• 700+ RPM range machinery complement with a strong flow: 12.80 CFM @ 40 PSI and 10.60 CFM @ 90 PSI.
• Voltage: 220V / 60 Hz / Single Phase for compatibility with typical workshop circuits.
• PDP performance range shown as (-20°F to -51°F) for cold-weather performance, helping maintain output in challenging conditions.
• Sturdy steel tank and durable components designed for longer life, with a documented life-cycle of 3,000+ hours for the oil-free pump.

Who this is for

Ideal for professional shops, fabrication spaces, and DIY workspaces where quiet operation, dry air, and low-maintenance design matter. The combination of a large, steel 20-gallon tank, oil-free operation, integrated air drying, and a soundproof cabinet makes it a practical upgrade for continuous use and sensitive tooling alike.