Rolair 7.5 HP Two-Stage Stationary Compressors

Rolair 7.5 HP Two-Stage Stationary Compressors

Rolair 7.5 HP Two-Stage Stationary Compressors are engineered for high-output industrial environments where compromise is not an option. These units are the backbone of large automotive service centers, commercial tire shops, and manufacturing plants that require a relentless supply of high-pressure air (175 PSI) to keep production lines and heavy-duty tools moving.

By offering the high-speed recovery of the K30 pump or the massive displacement of the K50 pump, Rolair provides a tailored solution for any high-demand facility.

The K30 Series: High-Recovery Workhorse

The K30 pump is a legendary two-stage industrial pump known for its rapid recovery times and consistent performance. In a 7.5 HP configuration, it delivers a perfect balance of CFM and efficiency.

• Configurations: Available in Horizontal (H) and Vertical (V) tanks.
• Power: Options for Single-Phase (751) or Three-Phase (753) service.
• Tank Capacities:
  • 60/80 Gallon: Ideal for shops where space and power must be balanced.
  • 120 Gallon (112): Provides a large air buffer for high-consumption tools like 1″ impact wrenches.

The K50 Series: Maximum Displacement Industrial Plant

The K50 pump represents the pinnacle of Rolair’s 7.5 HP lineup. Featuring a massive, four-cylinder design, the K50 is built for extreme-duty cycles. It moves a significantly higher volume of air per minute, making it the primary choice for sandblasting, rock drilling, and large-scale pneumatic automation.

• Configurations: Available in Horizontal (H) and Vertical (V) tanks.
• Extreme Storage: These units are most effective when paired with 120-gallon (112) tanks to harness the full potential of the K50’s high CFM output.
• Durability: The four-cylinder design allows the pump to run cooler by distributing the compression load across more surface area.

Model Number Quick Reference

Industrial Engineering Features

• 100% Cast-Iron Construction: Both the K30 and K50 pumps utilize cast-iron cylinders and crankcases for maximum thermal stability and long-term rebuildability.
• Advanced Intercooling: High-capacity finned copper intercoolers significantly reduce air temperature between the first and second compression stages, improving efficiency and reducing moisture.
• Low-RPM Engineering: By running at a lower RPM than many competitors, these units minimize vibration and mechanical wear, resulting in a quieter shop environment and a longer service life.
• Stainless Steel Reed Valves: Precision-ground Swedish steel valves ensure maximum volumetric efficiency and are designed to withstand the heat of continuous-duty operation.
• Total Protection: Includes a heavy-duty, totally enclosed metal belt guard, industrial pressure switches with unloader valves, and ASME-certified, powder-coated tanks.

Technical Selection Guide