Rolair 5 HP Two-Stage Stationary Compressors

Rolair 5 HP Two-Stage Stationary Compressors

Rolair 5 HP Two-Stage Stationary Compressors are the heavy-duty workhorses of the industrial air world. Designed for 24/7 operation in high-demand environments—such as automotive service centers, fabrication shops, and manufacturing facilities—these units deliver a consistent 175 PSI and the massive CFM required for sustained tool operation.

By offering two distinct pump options (the high-efficiency K28 and the maximum-displacement K30), Rolair ensures there is a 5 HP configuration perfectly suited to your specific air volume requirements.

The K28 Series: High-Efficiency Performance

The K28 pump is a two-cylinder, two-stage masterpiece designed for shops that need high-pressure air with an emphasis on efficient recovery and cooler operation.

• Configurations: Available in both Horizontal (H) and Vertical (V) tanks.
• Power Options: Available in Single-Phase (51) or Three-Phase (53) configurations.
• Tank Sizes:
  • 60 Gallon: Compact industrial footprint for busy shops.
  • 80 Gallon: The vertical standard for maximum air storage in a corner-friendly design.
  • 120 Gallon (112): Maximum air reserve for high-consumption shops; ensures the motor stays off longer between cycles.

The K30 Series: Maximum Displacement Power

The K30 pump is the largest 5 HP pump in the Rolair lineup. It is engineered for extreme-duty cycles where maximum air volume is the only priority. This pump features a larger bore and stroke to move more air per minute than any other pump in its class.

• Configurations: Available in Horizontal (H) and Vertical (V) tanks.
• Power Options: Available in Single-Phase (51) or Three-Phase (53) configurations.
• Maximum Reserve: These units are frequently paired with 120-gallon tanks to provide a massive “buffer” of air for industrial machinery and high-torque impact tools.

Model Number Guide

Engineering & Durability Features

• Industrial-Grade Cast Iron: Both the K28 and K30 pumps feature 100% cast-iron cylinders and crankcases. This heavy-duty construction allows for superior heat dissipation and is fully rebuildable.
• Two-Stage Efficiency: Air is cooled between stages via a high-capacity finned copper intercooler. This results in cooler air entering the tank, less condensation, and higher volumetric efficiency.
• Low-RPM Engineering: Rolair pumps run at a lower RPM than many competitors, which significantly reduces noise levels, vibration, and mechanical wear.
• Swedish Steel Reed Valves: Precision-engineered stainless steel valves provide a long service life and high resistance to heat fatigue.
• Premium Protection: Every unit includes a totally enclosed metal belt guard, industrial pressure switches with unloader valves, and ASME-certified, powder-coated tanks.

Quick Specification Guide

Pro Tip: If your facility runs sandblasters, grinders, or multiple 1-inch impact wrenches, the K30 pump on a 120-gallon tank (e.g., V5112K30) is the recommended setup. The larger tank acts as a heat sink and storage reservoir, preventing the motor from cycling too frequently during peak usage.