The Castair R10312HP75-230 is a 10 HP, 3-phase rotary screw air compressor built around a 120-gallon horizontal tank and wired for 230V three-phase power. If your shop or facility is already running 3-phase 230V service — common in body shops, fleet maintenance bays, auto repair facilities, and light manufacturing — this machine steps in as a continuous-duty workhorse that replaces the stop-and-go cycle of a reciprocating piston compressor. Rotary screw technology runs without a duty cycle limit. The compressor builds air constantly, keeps up with simultaneous tool demand, and does not need a cool-down period between extended runs.
Note: Manufacturer specification data was not available from a website scrape at time of writing. Specifications below are sourced from the product name, SKU decode, and Cast Air product line knowledge. Contact us at 866-217-0063 for the most current published specs or a formal spec sheet.
Why Rotary Screw Over Piston for a Production Shop
- Continuous duty rating: Rotary screw compressors are designed to run 100% of the time under load. A piston compressor runs hot and needs rest after heavy use. In a shop where air demand is constant — multiple lifts, air tools, a spray gun, tire service — a rotary screw machine keeps pressure stable without temperature-related shutdowns.
- Lower noise floor: Rotary screw compressors run significantly quieter than comparably sized reciprocating units. In a working shop bay, that difference matters over an eight-hour shift.
- Oil-lubricated compression stage: Cast Air rotary screw units use an oil-flooded compression element that runs cool and extends component life. A downstream oil separator removes the oil before air reaches your tools and lines.
- 3-phase power efficiency: Three-phase motors start smoother, run cooler, and pull fewer surge amps at startup compared to single-phase motors of the same horsepower. The 230V configuration works with the most common 3-phase service voltage found in commercial buildings and shop facilities in North America.
- 120-gallon horizontal tank: The large-capacity receiver tank provides an air buffer that smooths pressure fluctuations when multiple tools kick on simultaneously. Horizontal orientation keeps the installation footprint low — important in shops where ceiling height is adequate but floor space is limited.
Technical Specifications
- Model: R10312HP75-230
- Motor horsepower: 10 HP
- Phase: 3-phase
- Voltage: 230V
- Tank capacity: 120 gallons
- Tank orientation: Horizontal
- Compressor type: Rotary screw
- Duty cycle: Continuous (100%)
- CFM output: Contact us — confirmed CFM not specified in product name for this voltage variant
- Operating pressure: Contact us for rated PSI range
- Price: Call for pricing and availability — 866-217-0063
What This Compressor Handles in a Working Shop
- Multiple simultaneous air tools: Impact wrenches, ratchets, die grinders, and air hammers running at the same time without pressure sag at the whip line.
- Two-post and four-post lifts: Air-over-hydraulic shop lifts need stable, consistent pressure to cycle correctly. A rotary screw machine maintains line pressure even while lifts are cycling.
- Spray painting and refinishing: HVLP and conventional spray guns require stable CFM delivery. A large tank plus continuous-duty screw compressor eliminates the pressure fluctuation that causes orange peel and fisheye in finish coats.
- Sandblasting and media blasting: High-demand abrasive blasting operations benefit directly from a machine that does not need to pause and recharge.
- Tire service and inflation: Fleet shops handling trucks, commercial vehicles, and trailers move a lot of air through tire service alone. A 120-gallon receiver handles burst demand without dropping below working pressure.
- Pneumatic assembly lines and light manufacturing: Any process that requires continuous air supply at consistent pressure is a direct candidate for this class of machine.
230V vs. 460V — Choosing the Right Voltage for Your Shop
Cast Air offers this compressor platform in both 230V and 460V three-phase configurations. The 230V version (this unit) is the right choice when your facility already has 230V 3-phase service available, or when you want the flexibility of a voltage that is widely available across commercial service panels in North America. Most standard 3-phase electrical services in shops and light industrial facilities are already at 208-230V, meaning no transformer upgrades are required.
If your facility runs 460V (or 480V) 3-phase service — more common in heavy industrial environments and larger plants — the R10312HP75-460 is the better fit. Higher voltage means lower current draw at the same wattage, which reduces wire sizing requirements and generates less heat in long conduit runs. For a shop already on 230V, there is no compelling reason to upgrade service for this compressor size. For a new install in an industrial facility with 460V available, use the 460V variant.
Horizontal Tank — When It Makes Sense
The R10312HP75-230 ships on a horizontal 120-gallon tank. Horizontal orientation is the right call when ceiling height is not a constraint and you want a lower center of gravity — the unit sits closer to the floor, which simplifies moving it with a pallet jack and keeps the center of mass stable. If floor space is tight and you have ceiling clearance, the vertical-tank equivalent (R10312VP75-230) accomplishes the same task in a smaller footprint. If your compressor room has a low ceiling, horizontal is the only option at this tank size.
Why Buy From OEM Diagnostic Tools?
OEM Diagnostic Tools has been selling commercial and industrial compressed air equipment since 2016. We are not a big-box retailer. We are a specialist distributor that works directly with contractors, fleet managers, shop owners, and facility managers who need the right compressor matched to the right application — not the cheapest unit that sort of fits.
- Free shipping on qualifying orders to the continental United States
- Free technical support at 866-217-0063 — call us before you buy to confirm this is the right machine for your electrical service, your CFM demand, and your installation space
- Full manufacturer warranty honored on every Cast Air unit we sell
- Honest upgrade guidance: If a smaller or larger compressor better fits your actual demand, we will tell you before you order — not after
- No markup on support: We answer application questions, electrical questions, and installation questions at no charge, whether you bought from us last week or three years ago
Call us at 866-217-0063 to confirm current pricing, lead time, and availability on the R10312HP75-230. Pricing on this unit is by quote.
Call 866-217-0063 for quick answers and help!
