Cast Air R1038VP75-460 — 10HP 3-Phase Rotary Screw Air Compressor, 40 CFM at 100 PSI, 80-Gallon Vertical Tank, 460V
The Cast Air R1038VP75-460 delivers 40 CFM at 100 PSI from a 10 horsepower 3-phase rotary screw compressor mounted on an 80-gallon vertical air receiver. It runs on 460V 3-phase power. This is a proven continuous-duty machine: if your shop is running sanders, spray equipment, impact tools, and tire equipment through a full shift, 40 CFM at 100 PSI from a rotary screw is what keeps tools performing without pressure drop.
Note on tank size: The model number suffix "-VP75" suggests a 75-gallon tank designation, but the confirmed product listing specifies an 80-gallon vertical tank. The 230V version (R1038VP75-230) is listed at 75 gallons. Verify current specifications with us at 866-217-0063 before ordering if tank volume is a deciding factor.
Performance Specifications
- Motor output: 10 HP
- Phases: 3-phase
- Voltage: 460V (for 460V or 480V 3-phase service)
- CFM output: 40 CFM at 100 PSI — confirmed
- Tank volume: 80 gallons, vertical orientation — confirmed
- Duty cycle: 100% continuous (rotary screw)
- Additional specs (max PSI, dimensions, weight, oil capacity) — contact us to confirm
What 40 CFM at 100 PSI Means in a Working Shop
CFM is the number that actually determines whether your compressor can keep up. Here is how 40 CFM at 100 PSI maps to real shop tool use:
- Typical 1/2" air impact wrench: 4-5 CFM at 90 PSI. The R1038VP75-460 can sustain 8 or more running simultaneously on average use.
- Spray gun (HVLP): 10-15 CFM at 30-45 PSI at the gun. A single painter draws roughly 25-35% of this compressor's output.
- DA orbital sander: 8-12 CFM. Two sanders running at once draws 20-30 CFM — leaving margin for other tools.
- Tire inflation and shop blow guns: Intermittent, low sustained draw. Easily handled alongside other tools.
- Practical rule of thumb: Plan for 60-70% of rated CFM as your sustainable working capacity. That gives you roughly 24-28 CFM of reliable simultaneous tool supply while the rotary screw cycles to recharge the tank.
80-Gallon Vertical Tank — Floor Space and Performance
The vertical tank serves two functions: demand buffering and space efficiency.
- Buffer for demand spikes — Short bursts of high-demand tool use (impact guns, blow guns) pull from stored air. The compressor does not have to respond instantly to every spike, which reduces motor cycling and extends compressor life.
- Vertical orientation — An 80-gallon vertical tank occupies significantly less floor space than a horizontal 80-gallon tank. In a shop with two or three bays and limited floor space, this is a meaningful operational advantage.
- Wall positioning — Vertical tanks position naturally against a wall or in a corner, minimizing interference with bay traffic and keeping main air lines short.
460V 3-Phase — Advantages Over 230V
If your facility already has 460V 3-phase service, this is the version to order. Here is why 460V is the better choice when the service is available:
- Lower amperage draw — A 10HP motor at 460V draws approximately 14-16 amps full load. The same motor at 230V draws approximately 28-32 amps. Half the amperage means smaller wire gauge, smaller breaker, and less heat in your electrical infrastructure.
- Less voltage drop over distance — Lower amperage through the same wire gauge produces less voltage drop. If your compressor is more than 30-50 feet from the panel, 460V is significantly more efficient and the motor runs closer to its rated voltage under load.
- Cooler running under sustained load — Lower amperage translates to less resistive heat in the wiring and motor windings. This matters for long shifts.
- Industrial standard — Many facilities with serious production equipment run 460V 3-phase as the primary service. This compressor fits natively into that infrastructure without adapters or phase converters.
R1038VP75-460 vs. R1038VP75-230 — Choosing Between Them
The performance output (40 CFM at 100 PSI from a 10HP rotary screw) should be equivalent between the 230V and 460V versions. The difference is voltage, amperage, and wiring requirements:
- If your shop has 230V 3-phase service, order the R1038VP75-230
- If your shop has 460V (or 480V) 3-phase service, order this unit — the R1038VP75-460
- Never connect a 460V motor to a 230V circuit, or vice versa. Confirm your service voltage with your electrician before ordering.
- Tank size may differ slightly (230V listed at 75 gal, 460V confirmed at 80 gal) — contact us to verify current production specs.
Rotary Screw Advantages for Shops Running Full Shifts
- 100% continuous duty — Unlike piston compressors (typically rated at 50-75% duty), a rotary screw runs without a mandated cooling cycle. It can produce compressed air all day without overheating under normal operating conditions.
- Quieter operation — Rotary screw units run substantially quieter than equivalent piston compressors. Easier communication in the shop, and lower noise exposure for technicians.
- Stable air pressure — The combination of continuous-duty operation and a properly sized tank keeps pressure steady during peak tool use, rather than the pressure sagging and recovering that is common with undersized piston equipment.
- Lower vibration — No reciprocating pistons means lower mechanical vibration. Better for compressor longevity and for air line fittings that can loosen over time from vibration.
Installation Requirements
- 460V 3-phase dedicated circuit — Required. Size the breaker to NEC standards (125% of motor FLA). A licensed electrician should handle the installation and confirm service compatibility.
- Ventilation — Rotary screw compressors generate heat during operation. The installation space must have adequate airflow. Do not install in an enclosed room without ventilation.
- Level concrete surface — Install on a level pad. Consult the installation manual for any anchor point or vibration isolation specifications.
- Condensate drain — Water accumulates in the tank from compressed air moisture. Plan for regular draining, either manual or with an automatic drain valve, to prevent rust and air quality issues.
- Air distribution sizing — Size your shop air lines to carry 40 CFM without excessive pressure drop. Undersized lines negate the performance advantage of the compressor.
What's in the Box
Confirm complete contents with current manufacturer documentation.
- Rotary screw compressor and motor assembly
- 80-gallon vertical air receiver tank
- Tank pressure gauge
- Safety relief valve
- Motor starter and control panel
- Initial oil charge (confirm with product documentation)
- Installation and maintenance manual
Why Buy From OEM Diagnostic Tools?
OEM Diagnostic Tools has been selling professional shop equipment since 2016. We stock rotary screw compressors because we work with shops that run equipment hard and cannot afford downtime. When you call us before you order, you get a real conversation about whether this unit fits your electrical service, your CFM demand, and your facility layout — not a generic sales pitch.
- Free shipping on this unit (freight delivery — confirm delivery access and lift gate needs at your location)
- Free tech support at 866-217-0063 — call with voltage, sizing, or installation questions before you commit
- Full manufacturer warranty honored
- Straight answers — if the 15HP unit is what your shop actually needs, we will say so
Call 866-217-0063 for quick answers and help!
