The Castair R20312VG30-230 is a 20HP 3-phase rotary screw air compressor built for shops and facilities that need continuous, high-volume compressed air on a 230V electrical supply. With a 120-gallon vertical tank, this unit delivers the storage capacity a busy operation requires while keeping the floor footprint manageable. If your shop runs multiple air tools, a spray booth, pneumatic lifts, or other air-hungry equipment for hours at a time, this is the class of compressor that can keep pace — a piston unit at this power level simply cannot match the duty cycle of a rotary screw.
Note: Manufacturer specification sheets for this model were not available at time of listing. Specifications below are derived from the product model number. Contact us to confirm full spec details before purchase.
Key Features
- 20HP Rotary Screw Pump: Oil-injected rotary screw element provides 100% continuous duty cycle — runs cooler and quieter than reciprocating piston compressors at equivalent horsepower
- 3-Phase 230V Power Supply: Requires 3-phase 230V service at your panel — confirm your electrical capacity before ordering
- 120-Gallon Vertical Tank: Vertical orientation maximizes air storage while minimizing the machine footprint on the shop floor
- Load/Unload Control: Integrated controller matches compressor output to demand, extending component life compared to constant-speed cycling
- TEFC Motor: Totally Enclosed Fan Cooled motor resists dust, debris, and moisture found in typical shop environments
- Integrated Air/Oil Separator: Reduces oil carryover into the air stream, protecting downstream tools and equipment
- Thermal Protection: Motor overload protection prevents damage from overheating or voltage irregularities
Technical Specifications
- Horsepower: 20 HP
- Power Supply: 3-Phase, 230V
- Tank Capacity: 120 Gallons
- Tank Orientation: Vertical
- Compressor Type: Rotary Screw
- Duty Cycle: 100% continuous
- Model Number: R20312VG30-230
CFM output, operating PSI range, dimensions, and weight are not confirmed in available reference data. Call 866-217-0063 for full specifications.
Applications
A 20HP rotary screw in this configuration handles the sustained air demands of a mid-size auto repair shop, collision center, or light industrial facility. Typical uses include:
- Running multiple air tools simultaneously — impacts, ratchets, DA sanders, die grinders
- Continuous operation of a downdraft spray booth
- Pneumatic lifts and shop presses
- Sandblasting and media blasting operations
- Tire service equipment and fleet inflation stations
- Small production lines requiring consistent air pressure without interruption
Why Buy From Us?
We have been selling and supporting compressed air equipment since 2016. We carry the full Cast Air lineup and can help you match the right compressor to your actual air demand — not just the horsepower number on the nameplate. We offer free shipping on qualifying orders, and our team is available by phone to help you confirm electrical requirements, review installation needs, and compare models side by side before you commit.
Call for pricing and availability: 866-217-0063
Call 866-217-0063 for quick answers and help!
