Rolair PMP12K18CH Air Compressor Pump With Flywheel

The Rolair PMP12K18CH is a 2-3 HP, belt-drive, single-stage air compressor pump (K18) designed as a direct replacement for Rolair belt-drive compressors. This K18 pump assembly includes a 10-inch flywheel, which helps smooth belt drive dynamics and stabilize airflow during cycling. The PMP12K18CH designation identifies a Rolair pump in the K18 family and is intended for use on Rolair’s single-stage, belt-drive systems, making it a common choice for repair, retrofit, or OEM replacement projects. The unit is described in Rolair’s parts literature as a 1-stage pump with a flywheel, aligning with standard Rolair configurations that pair a pump head with the appropriate motor and drive components. In practical terms, technicians select this pump to restore compressor performance when the original pump has failed, enabling continued operation without replacing the entire compressor assembly.