ABAC AS-7.5501TM7 7.5 HP Rotary Screw Air Compressor - 71 Gallon Tank Mount, 150 PSI, 27.1 CFM, 67 dBA

The ABAC AS-7.5501TM7 is a 7.5 HP rotary screw air compressor shipped already mounted on a 71 gallon air receiver, so it lands as one package with no separate tank to source or plumb. It delivers 27.1 CFM at a 150 PSI maximum and runs at 67 dBA, quiet enough to sit in the work area instead of a separate compressor room. A screw compressor is built for continuous duty, so unlike a piston machine it holds line pressure through a full shift rather than recovering between jobs. Choose 230V single-phase (AS-7.5501TM7, part 4152044122) or 208-230-460V three-phase (AS-7.5503TM7, part 4152043892).

Key specifications

• Models: AS-7.5501TM7 (230V 1-phase) / AS-7.5503TM7 (208-230-460V 3-phase)
• Part numbers: 4152044122 / 4152043892
• Motor: 7.5 HP
• Air delivery: 27.1 CFM
• Maximum pressure: 150 PSI
• Noise level: 67 dBA
• Receiver: 71 gallon, compressor tank mounted
• Power supply: 230/1/60 or 208-230-460/3/60
• Weight: 507 lbs
• Dimensions: 63 x 23 x 57 in (L x W x H)
• Fully integrated aluminum block air end
• Vertical oil separation technology
• Digital controller with menu driven operation and programmed maintenance
• Brand: ABAC, part of the Atlas Copco group

How it compares

Within the AS-B 7.5 HP family the decision comes down to pressure, receiver size and whether air treatment is in the package. The 125 PSI build on the same 71 gallon tank delivers 30.5 CFM instead of 27.1, so take this 150 PSI version when line pressure rather than raw volume is the constraint, for instance a long pipe run or equipment that specifies more than a standard 125 PSI supply. The base mount is the same compressor without a tank at 360 lbs and a 32 x 24 x 40 in footprint, for shops that already own a receiver. The 131 gallon tank mount carries a larger receiver for longer run and rest cycles, and the 71 gallon tank mount with dryer adds an integrated refrigerated dryer so compressor, receiver and air treatment arrive as a single 3-in-1 unit.

Typical applications

Automotive service bays, tire shops, small production and fabrication floors, cabinet and woodworking shops, and any operation where a piston compressor is cycling too hard to keep up. The 150 PSI rating adds headroom over the 125 PSI build when equipment downstream calls for a higher line pressure, or when a long run of pipe eats into pressure at the point of use. The 71 gallon receiver keeps the machine from short cycling on intermittent demand, which is the quickest way to shorten the life of any screw compressor.

Installation and service

Leave clearance on the cooling air side so the unit can move air freely, keep the room ventilated and above freezing, and run the compressor on its own circuit sized to the motor nameplate. Oil, oil filter and separator element are the routine service items, and the digital controller tracks the intervals for you. If the air feeds paint, tires, instrumentation or anything else that will not tolerate moisture, add a refrigerated air dryer and filtration downstream, or step across to the tank mount with dryer build.

Part of the ABAC AS-B 5 to 20 HP screw range from the Atlas Copco group. See the full range of rotary screw air compressors, or browse refrigerated air dryers if you are specifying air treatment at the same time.

CFM measured per ISO 1217 Annex C, quoted at 138 PSI for 150 PSI maximum units. Noise measured per ISO 2151:2004 using ISO 9614/2 (sound intensity method).