Sullair Corporation 1109E/A

What capacity and discharge pressure does it actually deliver?

This unit is rated for 68 CFM at 125/135 PSIG discharge pressure. Rotary screw compressors typically deliver their rated capacity within a few percent under normal conditions, though performance will drop if intake air temperature exceeds 104°F or if elevation is significantly above sea level.

What drive, power and cooling does it require?

The compressor is driven by a 15 hp totally enclosed fan-cooled (TEFC) motor drawing 11 kW. The TEFC motor relies on the fan for cooling and requires unobstructed airflow around the enclosure; rotary screw packages like this are typically air-cooled and should be installed where ambient temperatures remain below 104°F for full capacity.

What are the running hours and what has been rebuilt?

The unit has logged 39,772 hours. The listing does not specify whether the airend, motor, or any other major components have been rebuilt, so you should ask the seller for service records and what maintenance has been performed at this hour count.

What should I inspect on a used compressor before buying?

Run the unit under load and check for abnormal noise or vibration from the airend bearings and rotor pack, which are the highest-wear components on rotary screws. Verify actual discharge pressure and flow, inspect the separator and filtration system for condition, check motor windings and bearing condition, and review the WS controller for fault history. At 39,772 hours, confirm whether the airend has been rebuilt and request oil analysis or compression testing results if available.