Rolair H5112K28 Air Compressor – 5HP 120Gal
Extreme Flow Output: Supplies 18.0 CFM @175PSI.
Large Horizontal Reservoir: Provides massive air storage.
Industrial Build Quality: Utilizes premium iron components.
Single Phase Voltage: Supports 200V grids.
Large Scale Production: Supports continuous industrial demand.
Description
Rolair H5112K28 Air Compressor – Stationary Power System
The Rolair H5112K28 Air Compressor – 5HP 120Gal is engineered for high-demand industrial environments requiring a consistent and reliable source of compressed air. This heavy-duty horizontal unit provides the structural stability and pressurized volume necessary for intensive pneumatic operations. Focusing on long-term performance makes this model a top choice for professional industrial air compressors across various North American manufacturing sectors.
Rolair H5112K28 Technical Specs
- Tank Capacity: 120 Gallon ASME
- Lubrication Type: Splash Lubricated Pump
- Motor Rating: 5HP NEMA ODP
- Power Specs: 230V Single Phase
- Pressure Max: 175 PSI Limit
- Air Delivery: 18.8 CFM @ 90 PSI
- Warranty: 1-Year Factory Terms
Rugged Cast Iron Construction
This 5HP system features a 100% cast iron pump and cylinders to ensure superior heat dissipation during heavy duty cycles. The internal assembly utilizes Swedish Steel valves and a finned intercooler to maintain thermal stability. An oversized crankshaft and balanced flywheel minimize vibration, protecting the internal bearings and extending the service life of the pump components.
Simplified Daily Maintenance Access
Engineered for professional uptime, this system provides DIY-friendly access for routine lubricant changes and valve inspections. The external oil sight glass facilitates rapid level checks while the accessible tank drain ensures efficient moisture management. These design features allow shop managers to maintain peak performance without requiring specialized mechanical tools or excessive downtime.
Lower Operating Energy Costs
The high volumetric efficiency of this pump translates into a superior ROI by reducing electrical consumption per CFM delivered. By optimizing pressure retention and cooling, the system effectively reduces motor cycling frequency and unnecessary component wear. This results in significant long-term savings on utility bills and prevents expensive emergency repair labor costs.
Versatile Industrial Shop Applications
Designed for professional collision repair and manufacturing plants, this 120-gallon horizontal unit supports multiple pneumatic impact wrenches simultaneously. The system integrates perfectly into fixed CNC air supply lines or high-volume paint booths. A centrifugal unloader ensures reliable cold-weather startups for units located in service trucks or detached industrial bays.
The Rolair H5112K28 Air Compressor – 5HP 120Gal delivers the consistent pressure and durability required for demanding high-output environments. Request Technical Quote or Check Availability at Muldepot.com.
Rolair H5112K28 Air Compressor Specs
| Brand | Rolair |
| Full Model Code | H5112K28 |
| Country of Origin | USA |
| Compressor Type | Reciprocating Piston (Two-Stage) |
| Lubrication Style | Splash Lubricated |
| Cooling System | Air Cooled |
| Motor Power | 5 HP |
| Max Working Pressure | 175 Psi |
| Free Air Delivery / Capacity | 15.5 CFM @ 175 Psi |
| Drive Type | Belt Drive (Electric) |
| Noise Level | 80-84 dB(A) |
| Outlet Connection Size | 1/2 Inch NPT |
| Tank Volume | 120 Gallons (Horizontal) |
| Dimension (LxWxH) | 1727 x 660 x 1168 mm |
| Net Weight | 245 kg |
| Control Panel Type | Pressure Switch Controlled |
| Voltage/Phase/Frequency | 230V / 1 Phase / 60 Hz |
| Standard Warranty | 1 Year Limited |
| Maintenance Interval | 500 Hours |
| Application | Large-scale industrial workshops requiring massive horizontal air storage and high-pressure duty cycles. |







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