ABAC AS-20253TM 20 HP Rotary Screw Air Compressor - 131 Gallon Tank Mount, 125 PSI, 60.6 CFM, 71 dBA

The ABAC AS-20253TM is the 125 PSI build of the 20 HP machine in the AS-B screw range, delivered on a 131 gallon horizontal receiver as a single assembly. It puts out 60.6 CFM at a 125 PSI maximum and runs at 71 dBA. Tank mount is the configuration to buy when there is no receiver already in the plant: compressor, tank and controls arrive piped and wired together, so installation comes down to setting it on the floor, bringing power to it and connecting the air line. At 813 lbs in a 76 x 27 x 62 in footprint it takes roughly the floor space of a workbench. Power is 208-230-460V three-phase.

Key specifications

• Model: AS-20253TM (part number 4152043924)
• Motor: 20 HP, energy efficient
• Air delivery: 60.6 CFM
• Maximum working pressure: 125 PSI
• Noise level: 71 dBA
• Mounting: tank mount on a 131 gallon receiver
• Power supply: 208-230-460/3/60
• Weight: 813 lbs
• Dimensions (L x W x H): 76 x 27 x 62 in
• Fully integrated aluminum block air end
• Eco-friendly vertical oil separation technology
• Digital controller with menu driven access for programmed maintenance
• Brand: ABAC, part of the Atlas Copco group

Why a screw instead of another piston

A piston compressor builds air in bursts and needs time to cool between them. A rotary screw is rated for continuous duty, so it holds a flat line pressure through a full shift instead of sagging and recovering between jobs. That is the reason shops using air most of the day move off a reciprocating machine that is cycling hard, running hot and filling the room with noise. The AS-B air end is built around a state of the art design that limits air loss, and ABAC pairs it with an energy efficient motor and a digital controller, so the operating menus and the service intervals sit on the panel rather than on a clipboard. The trade is that a screw dislikes short cycling, which is exactly what the 131 gallon receiver underneath this one is there to prevent.

How it compares

Across the AS-B range pressure, airflow and mounting all move independently. At 125 PSI this machine is the airflow build of the 20 HP frame. The AS-20503TM is the same compressor set for 150 PSI at 54 CFM, and the AS-20753TM goes to 175 PSI and 48.5 CFM. Buy pressure only to the level your highest tool actually needs, because every step up costs airflow. Stepping down in power, the AS-15253TM gives 52.1 CFM at the same 125 PSI and 69 dBA, which is the machine to compare against when the extra 8.5 CFM here is not yet needed. If you already own a receiver, the same air end comes as the AS-20253BM base mount at 516 lbs on a 37 x 28 x 40 in footprint. If you want drying built in, the AS-20253TMD is this exact machine with the refrigerated dryer already mounted and piped. Stepping up again, the AS-25253TMD carries 98.9 CFM.

Typical applications

Production and fabrication floors, larger automotive and fleet service shops, tire and truck bays, cabinet and woodworking shops, plasma and laser tables, packaging lines, and multi bay operations adding a blast cabinet or a finishing booth. At 60.6 CFM it will keep several bays of air ratchets, sanders and continuous blow off fed through a full shift without the line pressure sagging. The tank mount build is the one to buy for a new installation, or for a shop replacing a worn piston compressor outright, because it takes receiver sizing and tank piping out of the job.

What to pair it with

Give the cabinet clear air on the cooling side, keep it out of a hot corner, and run it on its own circuit sized to the motor nameplate. Oil, oil filter and separator element are the service items, and the digital controller tracks the intervals. Air leaving any screw carries moisture, so if it goes to paint, tires, pneumatic controls or anything that hates water, put a refrigerated dryer behind it. At 60.6 CFM the ABAC COOL 65 is the minimum size and the COOL 75 gives useful headroom; both run on 115V, so they sit beside the compressor without new wiring. See the rest of our rotary screw air compressors and the full refrigerated air dryer range. Call us with your tool list and duty cycle and we will confirm connection sizes and installation clearances before you pipe it in.

CFM measured per ISO 1217 Annex C. Noise measured per ISO 2151:2004 using ISO 9614/2 (sound intensity method).