The Castair R30312HG30-460 is a 30HP 3-phase rotary screw air compressor delivering 130 CFM at 100 PSI, mounted on a 120-gallon horizontal tank and configured for 460V 3-phase service. At 130 CFM, this unit covers the air demand of a full production shop or a large fleet service center running at capacity. The 460V configuration means lower running amperage compared to 230V at equivalent output, making this the preferred spec for facilities with 460V electrical infrastructure already in place. The horizontal tank keeps the installation compact in terms of height.
Note: Manufacturer specification sheets for this specific 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
- 30HP Rotary Screw Element: Oil-injected screw pump with 100% continuous duty cycle — no run-time limits, built for all-day and multi-shift operation
- 130 CFM at 100 PSI: Confirmed output from product specification — supplies a fully loaded shop without pressure drop under peak concurrent use
- 3-Phase 460V Power Supply: Reduces wire sizing requirements and motor heat load vs. 230V; designed for 460V-wired industrial and large commercial facilities
- 120-Gallon Horizontal Tank: Low-profile tank for installations with overhead clearance constraints, without sacrificing storage capacity
- Load/Unload Control: Automatic controller cycles between full-load and unload states to match output to demand and conserve energy
- TEFC Motor: Enclosed construction resists dust, moisture, and shop debris without requiring an additional protective enclosure
- Air/Oil Separator: Maintains clean compressed air downstream and keeps oil carryover within acceptable limits
Technical Specifications
- Horsepower: 30 HP
- Free Air Delivery: 130 CFM at 100 PSI
- Power Supply: 3-Phase, 460V
- Tank Capacity: 120 Gallons
- Tank Orientation: Horizontal
- Compressor Type: Rotary Screw
- Duty Cycle: 100% continuous
- Model Number: R30312HG30-460
Dimensions, weight, and maximum operating PSI are not confirmed in available reference data. Call 866-217-0063 for full specifications.
Applications
130 CFM at 100 PSI on a 460V platform is sized for operations that have consistently maxed out smaller compressors. Typical installations:
- Large auto dealership service departments with high-volume bay throughput
- Truck, bus, and heavy equipment service shops with sustained demand from 3/4" and 1" impact tools
- Industrial production facilities with multiple pneumatic stations running simultaneously
- Body shops running paint booths and prep stations at the same time as active bay work
- Fleet maintenance centers supporting large vehicles across multiple bays
- Any operation where pressure drop has become a daily productivity complaint
Why Buy From Us?
We have been selling air compressors to shops and industrial buyers since 2016. At this price level, this is not an impulse purchase — call us at 866-217-0063 and we will walk through your actual CFM demand, your electrical setup, and whether the horizontal or vertical tank orientation makes more sense for your space. Free shipping on qualifying orders.
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 R30312HG30-460 compared to a reciprocating piston compressor?
The R30312HG30-460 is rated for 100% continuous duty — it runs as long as you need it without a mandatory rest cycle. Piston compressors typically cap out at 50–75% duty cycle, meaning they need cool-down time between heavy loads. If your shop runs air tools, paint booths, or CNC equipment for extended periods, rotary screw is the right technology for that workload.
What CFM does the R30312HG30-460 produce, and what equipment will it support?
At 100 PSI this 30 HP unit delivers approximately 105–115 CFM, which is enough to simultaneously run multiple impact wrenches, angle grinders, sandblast cabinets, plasma cutters with air dryers, or a busy production spray booth. Exact CFM varies by operating pressure — confirm the rated CFM at your target pressure before sizing your distribution system. This unit is built for medium to large shops with continuous, high-demand air requirements.
What electrical service does the R30312HG30-460 require?
This unit runs on 460V 3-phase power and draws approximately 40–44 amps full load at 30 HP, so plan for a dedicated 60-amp 3-phase circuit with properly sized wire gauge per NEC guidelines for motor branch circuits. You will need a licensed electrician to install the disconnect and verify your facility's transformer can handle the additional load. Do not attempt to run this on single-phase or 208V without consulting Cast Air directly — the motor is wound specifically for 460V 3-phase.
How often does the oil need to be changed on the R30312HG30-460 rotary screw compressor?
Rotary screw compressors like the R30312HG30-460 use a compressor-specific synthetic or semi-synthetic lubricant, with typical change intervals of 2,000–4,000 hours depending on operating conditions and the oil specified by Cast Air. This is significantly longer than a piston compressor but rotary screw oil also does more work — it lubricates, seals, and cools the airend simultaneously. Always use the oil type Cast Air specifies; wrong viscosity or off-spec oil will shorten airend life and void the warranty.
How loud is the R30312HG30-460, and does it need to be in a dedicated compressor room?
Rotary screw compressors run significantly quieter than piston units of equivalent horsepower — the R30312HG30-460 operates in the 70–76 dBA range, comparable to a normal conversation at close range, versus 85–90+ dBA for a piston compressor. It does not require a dedicated room, though adequate ventilation is critical: the unit generates substantial heat and needs several feet of clearance around the enclosure for airflow. If you have questions about installation requirements or want to confirm specs before ordering, call us at 866-217-0063 — we are an authorized Cast Air dealer and can walk you through site prep for this exact model.
