Rolair PMP22K28CH Two Stage Air Compressor Pump

Rolair PMP22K28CH is a 3–5 HP two-stage belt-drive air compressor pump with a flywheel, designed for OEM replacement or retrofit on Rolair systems. The K28 in the model name refers to its flywheel configuration, with Rolair listing a cast-iron flywheel on this two-stage pump, which contributes to durability and smooth operation. In typical configurations, this PMP22K28CH delivers about 20.35 CFM of air at the target discharge, enabling higher pressure and more efficient duty cycles than a comparable single-stage pump when paired with a suitable 3–5 HP motor. Rolair classifies the PMP22K28CH within its two-stage belt-drive pump family and provides official schematics and pricing documentation for this model, confirming its role as a durable, shop-ready OEM pump option.