The Castair R313HP50 is a 31HP 3-phase horizontal rotary screw air compressor. This is a purpose-built industrial compressor for shops and facilities that need substantial continuous air output — the 31HP rating puts it just above the 30HP tier, which in practice delivers similar output to the 30HP class with performance tuned to a specific motor and drive configuration. The horizontal tank orientation keeps the installation profile low, which is useful in facilities where vertical clearance is limited.
Note: Manufacturer specification sheets for this model were not available at time of listing. Specifications below are derived from the product model number. Contact us to confirm full spec details, including CFM output, tank size, and voltage, before purchase.
Key Features
- 31HP Rotary Screw Element: Large oil-injected screw pump with 100% continuous duty capability — built for sustained, all-day air supply in demanding environments
- 3-Phase Power Supply: Requires 3-phase electrical service — phase and voltage must be confirmed before ordering
- Horizontal Tank Configuration: Low-profile installation suitable for facilities with ceiling clearance constraints
- Load/Unload Control: Automatic controller matches compressor output to demand, reducing energy consumption and extending pump service intervals
- TEFC Motor: Totally Enclosed Fan Cooled motor handles dusty and debris-heavy shop environments without additional enclosure
- Air/Oil Separator: Controls oil carryover into the compressed air stream to protect tooling and downstream equipment
- Pressure and Thermal Safety Controls: Standard safety equipment for production-grade compressor operation
Technical Specifications
- Horsepower: 31 HP
- Phase: 3-Phase
- Tank Orientation: Horizontal
- Compressor Type: Rotary Screw
- Duty Cycle: 100% continuous
- Model Number: R313HP50
CFM output, operating PSI range, tank size, voltage, dimensions, and weight are not confirmed in available reference data. Call 866-217-0063 for full specifications.
Applications
A 31HP horizontal rotary screw is appropriate for high-demand automotive and industrial installations. Suitable for:
- Large automotive service and collision repair facilities
- Truck and heavy equipment shops with high concurrent air demand
- Industrial manufacturing with multiple pneumatic tool stations
- Fleet maintenance facilities requiring reliable all-day air supply
- Facilities where a horizontal tank is required by the installation space
Why Buy From Us?
We carry the full Cast Air rotary screw lineup and have been supplying industrial air compressors since 2016. Because manufacturer spec sheets for this model were not available at time of listing, we strongly recommend calling us before ordering — we can pull current specification data, confirm voltage requirements, and make sure this is the right match for your application. Free shipping on qualifying orders.
Call for pricing and availability: 866-217-0063
Call 866-217-0063 for quick answers and help!
