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Rolair two-stage cast-iron pump with 15-inch flywheel, aluminum head, 7.5 hp

Rolair

Rolair PMP22BK119GR air compressor pump 2 stage 2 cylinder 7.5 hp 175 psi

SKU CH-QW0R-829ZD

Two-stage, two-cylinder pump delivers 17.3 to 23.0 cfm at 175 psi with a 7.5 hp rating

  • Two-stage compression delivers higher pressure efficiency
  • 175 psi maximum operating pressure for demanding tasks
  • 5 hp motor provides strong power output
  • 3 to 23.0 cfm free air flow at max pressure
  • Cast iron and aluminum construction ensures durability

Two-Stage Pump for High-Pressure Shop Air

The Rolair PMP22BK119GR is a two-stage, two-cylinder compressor pump rated at 7.5 hp with a maximum operating pressure of 175 psi. It delivers free air flow of 17.3 cfm at 175 psi and 23.0 cfm at lower pressure, running at 1,200 RPM with a 15-inch flywheel included. The cast iron and aluminum construction uses splash lubrication and stainless steel reed valves for durability in stationary installations.

Suited for Replacing Twin-Cylinder Units on 175

This pump fits workshops needing a direct replacement for a two-stage, CCW-rotation unit with a single B-groove flywheel and 3 1/16-inch stroke. It is not for builders who need a three-cylinder design, higher CFM at 175 psi, or a pump configured for CW rotation or multi-groove drive systems.

Verify Mounting, Drive and Electrical Compatibility

Confirm the existing tank accepts a two-cylinder block with the same bolt pattern and that the motor provides 7.5 hp at 1,200 RPM with CCW shaft rotation. Check that the B-section pulley matches the single groove on the 15-inch flywheel and that the electrical supply supports the motor’s voltage and phase requirements. Ensure plumbing can handle 175 psi discharge pressure.

How it compares

Measured against everything we stock in Compressors, Inflators & Vacuum Pumps, at today’s prices. Recalculated every night.

Price $669.99
Pricier than about 91% of the 1,520 comparable items (median $36.99).

Specifications

Product
Brand nameROLAIR

Questions about this item

What power source is required to run the 7.5 hp two-stage pump?

The pump needs a 7.5 hp motor or engine turning the 15 in flywheel at 1,200 RPM CCW with a single B-section groove.

Can the existing 15 in flywheel be reused if I replace an older Rolair pump?

Yes, the pump includes a 15 in flywheel with one B-section groove; match the groove and CCW rotation to your current drive.

How do I verify the pump delivers its rated output after installation?

Measure free air flow at the discharge; expect 17.3 cfm at 175 psi on the high-pressure stage and 23.0 cfm on the low-pressure stage.

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