ABAC AS-20S503TMD 20 HP Rotary Screw Air Compressor - 132 Gallon Tank Mount with Dryer, 150 PSI, 78 CFM, 67 dBA

The ABAC AS-20S503TMD is a 20 HP rotary screw air compressor supplied as a complete package: compressor, 132 gallon horizontal air receiver and integrated refrigerated dryer, all on one base. It delivers 78 CFM at 150 PSI and runs at 67 dBA. Power is 208-230-460V three-phase.

Key specifications

• Model: AS-20S503TMD
• Motor: 20 HP
• Air delivery: 78 CFM
• Working pressure: 150 PSI
• Noise level: 67 dBA
• Tank: 132 gallon receiver, tank mount
• Integrated refrigerated air dryer
• Power supply: 208-230-460/3/60
• Weight: 1297 lbs
• Dimensions: 75 x 31 x 72 in

Typical applications

Production and fabrication floors, automotive and fleet service bays, tire and truck shops, sandblasting and plasma cutting, spray finishing and powder coating, and any operation that needs a higher line pressure than a 125 PSI machine will hold and cannot afford water in the air. Drying the air at the compressor keeps condensate out of the distribution piping instead of leaving it for traps and filters downstream to catch.

Part of the ABAC AS-B screw range from the Atlas Copco group, built around a fully integrated aluminum block, vertical oil separation technology and an energy-efficient motor. The S in AS-20S is the difference worth understanding: against the standard AS-20503TMD at the same 20 HP and the same 150 PSI, this machine delivers 78 CFM instead of 54 CFM and runs at 67 dBA instead of 71 dBA. That is 24 CFM more air from the same motor rating, which is what shops reach for when several bays or a large blasting or finishing setup pull a standard 20 HP unit down. This is the 150 PSI build of the AS-20S TMD package; the 125 PSI AS-20S253TMD trades pressure for flow at 81.9 CFM, so choose on whichever of the two your tools actually run short of. Choosing the TMD package over a base mount means the receiver and the dryer are already matched, mounted and wired to the compressor, so there is no separate tank or dryer to size, site, plumb and power later. A rotary screw is designed for continuous duty, so it holds steady line pressure through a full shift rather than recovering between jobs.