ABAC AS-20753TMD 20 HP Rotary Screw Air Compressor - 131 Gallon Tank Mount with Dryer, 175 PSI, 48.5 CFM, 71 dBA

The ABAC AS-20753TMD is a complete 20 HP compressed air station on one base: a rotary screw compressor, a 131 gallon air receiver and an integrated refrigerated dryer, mounted and plumbed together at the factory. It delivers 48.5 CFM at 175 PSI and runs at 71 dBA on 208-230-460V three-phase power. This is the highest pressure build in the 20 HP tank mount with dryer family, specified when something on the floor genuinely needs 175 PSI at the point of use rather than 125 or 150.

Key specifications

• Model: AS-20753TMD (part number 4152043935)
• Motor: 20 HP, energy efficient
• Air delivery: 48.5 CFM
• Working pressure: 175 PSI
• Noise level: 71 dBA
• Tank: 131 gallon receiver, tank mount
• Integrated refrigerated air dryer
• Power supply: 208-230-460/3/60
• Fully integrated aluminum block air end
• Vertical oil separation technology
• Digital controller with programmed maintenance
• Dimensions: 76 x 27 x 62 in
• Weight: 913 lbs

How it compares

Within the 20 HP AS tank mount with dryer family the motor rating stays the same and pressure is traded against flow. This 175 PSI build gives 48.5 CFM; the 150 PSI AS-20503TMD gives 54 CFM and the 125 PSI AS-20253TMD gives 60.6 CFM, all on the same receiver at 71 dBA. Specify 175 PSI when a tool or process requires the pressure rather than as headroom, because every PSI above what the tools need costs flow. The package matters as much as the pressure. The AS-20753BM base mount is the compressor alone at 520 lbs in a 37 x 28 x 40 in footprint, for a shop that already has a receiver and a dryer. The AS-20753TM adds the receiver at 818 lbs, and this TMD build adds the dryer on top of that at 913 lbs on the same 76 x 27 x 62 in base, so the extra 95 lbs buys dry air without a second machine taking floor space. If the shop runs short of air rather than pressure, the AS-20S503TMD delivers 78 CFM at 150 PSI and a quieter 67 dBA from the same 20 HP rating. A step down at the same pressure is the 15 HP AS-15753TMD at 41.7 CFM.

Typical applications

Spray finishing and powder coating, plasma cutting, sandblasting, automotive and fleet service bays, tire and truck shops, pneumatic controls and production assembly, and any shop where a tool or process genuinely needs 175 PSI at the point of use. Drying the air at the compressor keeps condensate out of the distribution piping instead of leaving it for traps and filters downstream to catch, which is what otherwise turns up as runs in a finish, fouling on a plasma torch tip, or water in a blast pot. It matters most on long runs of overhead pipe, where the air cools on its way to the tool and drops its moisture at the worst possible place.

Installation and service

Plan the electrical for a 20 HP three-phase motor and size the disconnect and conductors to the nameplate. Leave clearance on the cooling air side and keep the room ventilated and above freezing, because a refrigerated dryer rejects heat into the same space the compressor does. A rotary screw is built for continuous duty, so it holds steady line pressure through a full shift rather than cycling on and off the way a piston compressor does. Oil, oil filter and the separator element are the recurring service items, and keeping a set on the shelf avoids a shutdown waiting on parts. Drain the receiver and check the dryer condensate drain on the same schedule.

Part of the ABAC AS-B screw range from the Atlas Copco group, built around a fully integrated aluminum block air end, vertical oil separation technology and an energy efficient motor. Compare the rest of the rotary screw air compressors, or browse refrigerated air dryers if you are adding drying capacity to a compressor you already own.