ABAC AS-20S253TMD 20 HP Rotary Screw Air Compressor - 132 Gallon Tank Mount with Dryer, 125 PSI, 81.9 CFM, 67 dBA

The ABAC AS-20S253TMD is a complete compressed air station on one base: a 20 HP rotary screw compressor, a 132 gallon horizontal air receiver and an integrated refrigerated dryer, delivered already matched, mounted and wired together. It delivers 81.9 CFM at 125 PSI and runs at 67 dBA on 208-230-460V three-phase power. At 1297 lbs in a 75 x 31 x 72 in footprint it replaces a compressor, a tank and a dryer that would otherwise have to be sized, sited, plumbed and powered as three separate purchases, and it arrives as one line item with one installation visit rather than three.

Key specifications

• Model: AS-20S253TMD (part number 4152028467)
• Motor: 20 HP, energy efficient
• Air delivery: 81.9 CFM
• Working pressure: 125 PSI
• Noise level: 67 dBA
• Tank: 132 gallon horizontal receiver, tank mount
• Integrated refrigerated air dryer, matched, mounted and wired at the factory
• Power supply: 208-230-460/3/60
• Weight: 1297 lbs
• Dimensions (L x W x H): 75 x 31 x 72 in
• Fully integrated aluminum block air end
• Eco friendly vertical oil separation
• Low noise and vibration levels, up to 10 percent lower carbon footprint
• Duty: continuous
• Brand: ABAC, part of the Atlas Copco group

How it compares

The S in AS-20S is the difference worth understanding: against the standard AS-20253TMD at the same 20 HP and the same 125 PSI, this machine delivers 81.9 CFM instead of 60.6 CFM and runs at 67 dBA instead of 71 dBA. That is roughly 21 CFM more air from the same motor rating, which is what shops reach for when sandblasting, plasma cutting, or several bays running at once pull a standard 20 HP unit down. If your tools want higher line pressure rather than maximum volume, the AS-20S503TMD holds 150 PSI at 78 CFM from the same 1297 lb package. If you need more volume still, the AS-25253TMD steps up to 98.9 CFM at 69 dBA and the AS-30253TMD to 114.1 CFM. Size on CFM first and on pressure second: a machine that makes the volume your tools actually draw will hold its set pressure, while one chosen on horsepower alone may not.

What the TMD package includes

TMD is tank mount with dryer. The compressor sits on the 132 gallon receiver and the refrigerated dryer is built into the same assembly, so the air is dried at the compressor before it ever reaches your distribution piping. That keeps condensate out of the lines instead of leaving it for traps and point of use filters to catch downstream, and it means the dryer is already sized to the compressor rather than guessed at. If you already own a receiver, the AS-20S253BMD puts the same compressor and dryer on a base at 798 lbs in a 55 x 31 x 49 in cabinet, and the AS-20S253BM is the bare compressor if you intend to size the dryer yourself from our refrigerated air dryers.

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 where water in the air line is spoiling tools, air logic or finish quality. A rotary screw is designed for continuous duty, so it holds steady line pressure through a full shift rather than recovering between jobs, and the 132 gallon receiver absorbs the demand spikes that would otherwise show up as pressure drop at the tool. The 67 dBA rating matters when the compressor shares a building with people: it is quiet enough to sit in the shop rather than in a separate room built to contain the noise.

Installation notes

At 75 x 31 x 72 in and 1297 lbs this is a set in place machine, so check the door width, the floor route and the headroom before delivery day. Run it on a dedicated three-phase circuit sized to the motor nameplate, and confirm which of the 208, 230 or 460 volt taps the panel will supply. Leave clear space on the cooling air side so the package is not recirculating its own hot air, and keep the room ventilated: a 20 HP screw puts real heat into the space it occupies. Route the dryer condensate to a drain point or an oil water separator rather than onto the shop floor. Oil, oil filter, air filter and separator element are the scheduled service items on a screw package, and keeping a spare set on the shelf stops a routine service from turning into downtime.

Part of the ABAC AS-B screw range from the Atlas Copco group, built around a fully integrated aluminum block, eco friendly vertical oil separation and an energy efficient motor. See the rest of our rotary screw air compressors, our fixed speed rotary screw air compressors and the full refrigerated air dryer range.