Castair R1018VG11 — 10 HP Single-Phase Rotary Screw Air Compressor, 80-Gallon Vertical Tank, G11 Air End
The Castair R1018VG11 is a 10 horsepower, single-phase rotary screw compressor built on an 80-gallon vertical ASME tank with the G11 air end. If your shop runs on single-phase power and you need a compressor that runs continuously without cycling on and off, this unit delivers 100% duty cycle operation at a compact footprint — 34 inches wide, 26 inches deep, and 70 inches tall. It is built in Minnesota by Castair, a manufacturer that focuses exclusively on cast iron, oil-lubricated compressors built for long service life in automotive, industrial, and agricultural shops.
The G11 air end designation means this unit uses the Castair G11 rotary screw element — a larger, slower-turning air end compared to the P75 entry-level element, designed for shops that want lower operating temperatures and longer service intervals. The vertical 80-gallon ASME tank keeps the footprint tight while providing enough storage volume to handle intermittent high-draw tools without the compressor straining to catch up.
Note: Exact CFM output for the G11 air end at 10 HP is not published on the Castair spec table (the P75-based R1018VP75 delivers 40 CFM at 100 PSI). Contact us at 866-217-0063 for confirmed G11 output figures and current pricing.
Key Features
100% Duty Cycle — True Rotary Screw Operation
- Continuous operation: Unlike reciprocating piston compressors that cycle on and off, the R1018VG11 runs continuously at full load without overheating.
- Steady airflow: Rotary screw technology delivers consistent pressure — no pulsing, no momentary drops when multiple tools are running simultaneously.
- Single-phase power: Operates on 230V single-phase service — no three-phase electrical upgrade required. Critical for shops in older buildings or rural locations.
G11 Air End
- G11 rotary screw element: The G11 is a heavier-duty air end than the P75 used in the standard 10 HP models. It operates at lower RPM for a given output, which produces less heat and typically extends rebuild intervals.
- Factory-filled synthetic lubricant: Castair fills the unit with CAST-LUBE synthetic oil — rated for 4,000 hours or one year of service between changes.
- Built-in air/oil separator with spin-on filter: Keeps oil carryover low downstream. The separator filter spins on and off without special tools.
- Spin-on oil filter: Automotive-style spin-on filter for fast, tool-free changes.
- Automotive paper element air filter: Standard paper element — available at any industrial supply house, no proprietary cartridges.
Simple Controls — No Computers, No Lockout Codes
- One solenoid controls the air end: No electronic control boards, no digital fault codes that lock the machine out and require a dealer reset.
- Analog pressure and temperature gauges: Read what the machine is doing at a glance — no menus to scroll through.
- High-pressure shutdown: Automatic shutoff if pressure exceeds the set limit.
- Dual high-temperature shutdown: Two separate temperature cutoffs protect the air end from heat damage.
- 10-minute shutdown timer: When air demand drops, the compressor unloads and runs for 10 minutes before shutting off, saving electricity. Restarts automatically when pressure drops below setpoint.
- Hour meter standard: Tracks runtime so you always know when service is due.
Pressure Options
- Standard: 135 PSI working pressure
- Optional: 150 PSI or 175 PSI — specify at time of order. Higher pressure settings reduce CFM output.
Tank and Cooling
- 80-gallon vertical ASME tank: USA-made ASME-certified receiver. Vertical orientation keeps the floor footprint to 34" x 26".
- Self-contained on tank: Air end, motor, cooler, and controls all mount directly on the tank — no separate receiver plumbing required.
- Air-cooled aftercooler/oil cooler standard: Reduces discharge air temperature and condenses moisture before it enters your air lines. The cooler is removable for cleaning when it accumulates shop dust.
- Off-shelf copper air/oil lines: All internal plumbing uses standard copper pipe — repair parts are at any hardware store, not special-order from a dealer.
Motor and Drive
- Heavy-duty industrial motor: 1,725 RPM with full 15% service factor or higher. Built for continuous-duty operation.
- V-belt drive with adjustable tensioner: Standard V-belts available at any industrial supply. Adjustable tensioner makes belt changes straightforward without special tools.
- Magnetic starter mounted and wired: Quality name-brand magnetic starter is installed at the factory. You connect your power supply — that is the only installation step.
Warranty
- 2-year warranty covering the air end, electric motor, and tank — direct from Castair.
What's in the Box
- Castair R1018VG11 rotary screw compressor, assembled on 80-gallon vertical ASME tank
- G11 air end, pre-filled with CAST-LUBE synthetic oil
- Air-cooled aftercooler/oil cooler
- Magnetic motor starter, mounted and wired
- Hour meter
- Analog pressure and temperature gauges
- Paper element air filter
- Spin-on oil filter
- Spin-on air/oil separator filter
- Belt guard
Optional factory-mounted add-ons: vibration pads (#VP1004, set of 4 — 4"x4"x1"), ball valve (BV75, 3/4"), metal flex discharge hose (VA075, 3/4" NPT x 18"), electronic auto tank drain (#SDV03M). Ask when ordering.
Available Configurations — Castair 10 HP Rotary Screw Lineup
Castair builds 10 HP rotary screw compressors in several configurations. Here is where the R1018VG11 fits:
- R1018VP75 — 10 HP, 1-Phase, 80-gal Vertical, P75 air end, 40 CFM @ 100 PSI, 565 lbs — standard single-phase entry
- R1018VG11 (this unit) — 10 HP, 1-Phase, 80-gal Vertical, G11 air end — upgraded air end for lower-RPM operation
- R1038VP75 — 10 HP, 3-Phase, 80-gal Vertical, P75 air end, 40 CFM @ 100 PSI, 585 lbs
- R1038VG11 — 10 HP, 3-Phase, 80-gal Vertical, G11 air end
- R10312VP75 — 10 HP, 3-Phase, 120-gal Vertical, P75 air end, 40 CFM @ 100 PSI, 645 lbs — more storage volume
Single-phase is limited to 10 HP and below in the Castair rotary screw lineup. For 15 HP and above, three-phase power is required.
When Does a Shop Need This vs. Stepping Up or Down?
- Choose the R1018VG11 if: You run on single-phase power, need 100% duty cycle continuous operation, and want the G11 air end for its lower-RPM characteristics and longer service intervals vs. the P75.
- Step down to R1018VP75 if the standard P75 air end meets your CFM needs. Both are 10 HP, 1-phase, 80-gallon vertical — the G11 is the premium air end option.
- Step up to a 3-phase unit if you have three-phase power available — three-phase motors run more efficiently and draw lower amperage for the same horsepower.
- Step up to 15 HP (R15312 series) if you are running a busy collision shop, multiple spray guns simultaneously, or continuous pneumatic production equipment that demands 52–58 CFM or more.
- A piston compressor is sufficient if your shop uses air tools only periodically throughout the day. The rotary screw earns its price premium in shops with continuous or near-continuous air demand.
Technical Specifications
- Model: R1018VG11
- Horsepower: 10 HP
- Phase: Single-phase
- Voltage: 230V standard
- Air End: Castair G11
- Tank: 80-gallon vertical, ASME-certified, USA-made
- CFM @ 100 PSI: Contact manufacturer for confirmed G11 output figure
- Working Pressure: 135 PSI standard (150 or 175 PSI optional)
- Approximate Dimensions: 34"L x 26"W x 70"H
- Approximate Weight: ~565 lbs (based on P75 equivalent; confirm for G11 variant)
- Motor Speed: 1,725 RPM
- Lubrication: Oil-flooded, CAST-LUBE synthetic (4,000-hour / 1-year interval)
- Duty Cycle: 100%
- Warranty: 2 years — air end, motor, tank
- Origin: Castair, Spicer, Minnesota, USA
Why Buy From OEM Diagnostic Tools?
We have been selling professional shop equipment since 2016 and carry the full Castair rotary screw lineup. We can help you match the right HP, tank size, air end, and voltage configuration to your actual shop's CFM demand and electrical service. Every unit ships with the full Castair manufacturer warranty. Our team provides free pre-purchase support — call us and we will tell you straight whether the G11 or P75 air end is the better fit for your application, based on your actual usage rather than a sales pitch.
Call 866-217-0063 for quick answers and help!
