ABAC AS-25253BM 25 HP Rotary Screw Air Compressor - Base Mount, 125 PSI, 98.9 CFM, 69 dBA

The ABAC AS-25253BM is a 25 HP rotary screw air compressor for plants that need high volume air without the noise and duty cycle limits of a reciprocating machine. It delivers 98.9 CFM at 125 PSI and runs at 69 dBA. This is the base mount version, so it ships without a tank and plumbs into an air receiver you already own or one sized to your demand. Power is 208-230-460V three-phase.

Key specifications

• Model: AS-25253BM (part number 4152028457)
• Motor: 25 HP
• Air delivery: 98.9 CFM
• Working pressure: 125 PSI
• Noise level: 69 dBA
• Mounting: base mount, no tank
• Power supply: 208-230-460/3/60
• Weight: 723 lbs
• Dimensions (L x W x H): 44 x 31 x 49 in
• Fully integrated aluminum block air end
• Vertical oil separation technology
• Digital controller with menu driven operation and programmed maintenance

Typical applications

Production and fabrication floors, automotive and fleet service bays, tire and truck shops, cabinet and woodworking shops, and any operation where a reciprocating compressor is working too hard to hold line pressure. A rotary screw is designed for continuous duty, so it maintains a steady line pressure through a full shift instead of recovering between jobs. At 98.9 CFM this machine will carry a bank of impact tools and sanders, a plasma table, a blast cabinet, or a paint booth running alongside the rest of the shop, which is the point at which most plants stop adding piston compressors and consolidate on one screw.

Where it sits in the range

At 98.9 CFM this 25 HP unit carries roughly 17 CFM more air than the 20 HP AS-20S253BM at the same 125 PSI, and the 30 HP AS-30253BM steps up again to 114.1 CFM. All three share the same 44 x 31 x 49 in base mount cabinet, so moving up the range costs you nothing in floor space: the AS-25 adds about 33 lbs over the 20 HP machine and sits about 36 lbs under the 30 HP. This is the step a plant makes when added bays, a blast cabinet, or a continuous process leave the smaller machine running loaded almost all the time. If your line pressure needs more headroom, the AS-25503BM holds 150 PSI at 92.2 CFM on the same frame, trading about 6.7 CFM for the extra 25 PSI. Buy pressure only to the level your highest tool actually needs.

Planning the installation

Base mount is the starting point for a modular compressed air system. Size the receiver to your demand and the way your shop draws air: a plant pulling in heavy bursts needs more stored air than one with a steady load. Leave clearance around the cabinet for cooling airflow and front access for service, and run the machine on a three-phase circuit sized to the motor nameplate. The digital controller handles start and stop, load and unload, and tracks service intervals, so routine maintenance is scheduled by the machine rather than by a calendar on the wall. Oil, oil filter, air filter and separator element are the consumables; keeping a set on the shelf is what stops a service call from becoming downtime.

Drying the air it makes

A screw compressor delivers warm, saturated air, and 98.9 CFM of it will put a lot of water into your lines if nothing removes it. Size the dryer above the compressor's output rather than level with it: the ABAC COOL 125 refrigerated air dryer is rated 125 CFM with a 232 PSI maximum working pressure, which leaves real headroom over this machine at 125 PSI. If you would rather buy the dryer already matched, mounted and wired, the same 25 HP air end is sold as the AS-25253BMD base mount package, or as a tank mount with an integrated dryer when you want the receiver in the same purchase. Add a filter ahead of any finishing or instrument air.

Part of the ABAC AS-B screw range from the Atlas Copco group. See the rest of our rotary screw air compressors and our refrigerated air dryers.