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

The ABAC AS-20753TM is the 175 PSI, 131 gallon tank mount build of the 20 HP machine in the AS-B screw range. It delivers 48.5 CFM free air delivery at a 175 PSI maximum and runs at 71 dBA. This is the highest pressure of the three builds on this frame, and it is the one to specify when a tool, a clamp circuit or a process genuinely needs 175 PSI at the point of use rather than as headroom. Because the air end, the controls and the receiver ship as one assembly, installation comes down to setting it in place, landing power and tying into the air line. At 818 lbs on 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-20753TM (part number 4152043926)
• Motor: 20 HP, energy efficient
• Air delivery: 48.5 CFM free air delivery
• Maximum working pressure: 175 PSI
• Noise level: 71 dBA
• Mounting: tank mount on a 131 gallon air receiver
• Power supply: 208-230-460/3/60
• Weight: 818 lbs
• Dimensions (L x W x H): 76 x 27 x 62 in
• Fully integrated aluminum air end block
• Eco-friendly vertical oil separation technology
• Digital controller with menu driven access for optimizing operating performance
• 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 fully integrated aluminum block and eco-friendly vertical oil separation, paired 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 move independently on the same chassis, and pressure is bought with airflow. This machine is the 175 PSI end of that trade at 48.5 CFM. The AS-20503TM is the same package set for 150 PSI and 54 CFM, and the AS-20253TM gives 60.6 CFM at 125 PSI. Before specifying this one, check the pressure rating of the highest tool on the floor, because stepping down to 150 PSI buys 5.5 more CFM from the same 20 HP motor. If you already own a receiver, the AS-20753BM is the bare 520 lb base mount at the same pressure and airflow on a 37 x 28 x 40 in footprint. If you want drying built in, the AS-20753TMD is this exact machine with the refrigerated dryer already mounted and piped. One size down, the AS-15753TM holds 175 PSI at 41.7 CFM on the same tank, which is the machine to compare against when the extra 6.8 CFM here is not yet needed.

Typical applications

Production and fabrication floors running high pressure clamping or forming, automotive and fleet service bays, tire and truck shops, plasma and laser tables, packaging lines, pneumatic controls and conveying, and long plant headers where pipe run losses eat into delivered pressure. At 48.5 CFM and 175 PSI it suits the shop whose constraint is pressure at the tool rather than raw volume. 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 48.5 CFM the ABAC COOL 65 is the sensible match and the COOL 75 gives headroom for growth; 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.