The Castair R20312VG30-460 delivers 20HP of rotary screw compression on a 3-phase 460V electrical supply, paired with a 120-gallon vertical storage tank. The 460V configuration is the preferred choice for facilities with 460V service already in place — motors run at lower amperage draw compared to 230V equivalents at the same horsepower, which means smaller wire gauge requirements and reduced heat in the motor windings. The product name confirms 80 CFM at 100 PSI, giving you a concrete number to work with when calculating whether this unit covers your tools.
Note: Manufacturer specification sheets for this model were not available at time of listing beyond what appears in the product name. Contact us to confirm full spec details before purchase.
Key Features
- 20HP Rotary Screw Element: 100% continuous duty cycle — designed to run all day without the heat buildup and wear associated with reciprocating piston compressors
- 80 CFM at 100 PSI: Confirmed output from the product specification — sufficient to run multiple air tools simultaneously in a busy shop environment
- 3-Phase 460V Power Supply: Lower amp draw vs. 230V at equivalent horsepower; confirm your panel has 3-phase 460V service before ordering
- 120-Gallon Vertical Tank: Vertical tank minimizes floor footprint while providing substantial buffer storage for peak demand events
- Load/Unload Control: Controller manages compressor cycling to match output to actual air demand, reducing energy waste during idle periods
- TEFC Motor: Totally Enclosed Fan Cooled — built to handle the dust and debris typical in shop and industrial environments
- Integrated Air/Oil Separator: Controls oil carryover to keep downstream air clean and protect pneumatic tooling
Technical Specifications
- Horsepower: 20 HP
- Free Air Delivery: 80 CFM at 100 PSI
- Power Supply: 3-Phase, 460V
- Tank Capacity: 120 Gallons
- Tank Orientation: Vertical
- Compressor Type: Rotary Screw
- Duty Cycle: 100% continuous
- Model Number: R20312VG30-460
Dimensions, weight, and maximum operating PSI are not confirmed in available reference data. Call 866-217-0063 for full specifications.
Applications
80 CFM at 100 PSI covers most of what a 4-6 bay auto shop or body shop needs running at full capacity. Common applications for this output class:
- Simultaneous use of multiple 1/2" and 3/4" impact wrenches
- Spray booth and paint gun operation alongside shop tool use
- Pneumatic brake bleeder, tire changer, and lift operation
- Fleet service facilities with consistent, high-cycle air demand
- Light industrial assembly with pneumatic tooling stations
- Sandblasting and surface prep operations
Why Buy From Us?
We have been in the compressed air equipment business since 2016. We stock the Cast Air rotary screw lineup and can walk you through the voltage, CFM, and tank size decisions before you buy. Free shipping on qualifying orders. Our tech team is reachable at 866-217-0063 to answer installation and compatibility questions.
Call for pricing and availability: 866-217-0063
Call 866-217-0063 for quick answers and help!
Frequently Asked Questions
What is the duty cycle on the R20312VG30-460, and how does it compare to a piston compressor?
The R20312VG30-460 is rated for 100% continuous duty — it can run all day without a mandated off cycle. A comparable piston compressor typically runs 60–75% duty cycle maximum before you risk overheating the cylinders and valves. If you're running a production floor, a paint booth, or any operation that pulls air consistently, this rotary screw is the right tool for the job.
How often does the R20312VG30-460 need an oil change?
Cast Air recommends oil changes every 2,000 hours under normal operating conditions using the specified rotary screw compressor oil — do not substitute standard motor oil or hydraulic fluid. The R20312VG30-460 also has an oil separator that should be inspected at the same interval and replaced as needed to keep carryover below spec. Keep a maintenance log; consistent intervals protect the airend warranty and extend rotor life significantly.
How loud is the R20312VG30-460 in a shop environment?
Rotary screw compressors in this class typically operate in the 69–72 dBA range at one meter — noticeably quieter than a comparable piston unit running the same HP, which often hits 85–90 dBA. The R20312VG30-460's enclosed cabinet and direct-drive configuration keep vibration and mechanical noise down. In a working shop it's audible but not conversation-stopping, and it won't trigger most facility noise ordinances.
What electrical service does the R20312VG30-460 require?
This unit requires 460V 3-phase power — it will not run on single-phase or 230V service. At 20 HP, you're looking at approximately 27–30 amps full load current, so plan on a dedicated 40-amp 3-phase circuit with proper wire gauge per NEC guidelines for your run length. If you're not sure whether your panel can support it, call us at 866-217-0063 and we can walk through the electrical requirements before you order.
What CFM output does the R20312VG30-460 deliver, and what air tools can it support?
At 100 PSI, a 20 HP Cast Air rotary screw in this configuration delivers approximately 80–85 CFM free air delivery — enough to run multiple impact wrenches, a plasma cutter, sandblast cabinet, or a combination of spray guns and air tools simultaneously. The 120-gallon vertical tank provides buffer capacity to handle short demand spikes without the compressor loading and unloading constantly. For a full spec sheet on the R20312VG30-460 or help sizing your system, contact Air Compressor Factory Direct at 866-217-0063.
