RSa 18
The Ingersoll Rand RSa 18 is a 18 kW-class oil-flooded rotary screw compressor in the RSa family.
Current model Availability checked 17 Sep 2026The RSa 18, also written RSA 18, is part of Ingersoll Rand’s RSa lineup. Retain the “a” when identifying the model: an RSa 18 should not be assumed to be the same machine as an RS with a similar number.
When comparing a quotation, establish the control type and delivered airflow at the intended pressure. The receiver and integrated air-treatment package also affect the space and equipment needed for the installation.
Options and variations
The full i/n/ix suffix and package identify the version. TAS indicates integrated air treatment; phase and receiver choices vary across this family. Check the exact model rather than carrying specifications across packages.
Related guides and troubleshooting
Would this model suit your installation?
Tell us what you need, or work through the buying guide to clarify your requirements.
Size my compressor →Optional next step
Ask ACG for help with your requirements
Share your project details if you would like help. You can use the guide without submitting this form.