Atlas Copco GA 75 (FF 75⁺) Oil-injected Air Compressor

The Atlas Copco GA 75 is the 75 kW fixed speed oil-injected screw compressor of the GA 30+-90 series, rated at 100 hp of installed motor power. One machine, two branches: the GA 75 itself and the GA 75+ build, each delivered as a Pack or as a Full Feature unit. Factory pressure versions cover 7.5, 8.5, 10, and 13 bar at 50 Hz, and the same duties return at 60 Hz under 100 to 175 psig nameplates. This page lists the complete technical data of every branch and pressure version so the right build can be matched to the duty.

Each unit ships as one pre-assembled package on a single base frame. A gear-driven screw element, a silenced canopy, coolers, and the Elektronikon controller arrive tested as one unit, so installation starts and ends with setting the machine in place and connecting the air and power lines.

Especificaciones técnicas

Capacity is measured according to ISO 1217, Annex C, Edition 4:2009, with FAD referenced to 7 bar on the 7.5 bar build, 8 bar on the 8.5 bar build, 9.5 bar on the 10 bar build, and 12.5 bar on the 13 bar build.

Installed motor power equals 100 hp on every version. The Pack weighs 1470 kg (3241 lb) and the Full Feature build 1800 kg (3968 lb); the plus branch adds ten kilograms to the Pack and five to the Full Feature unit. Sound pressure is measured at the work station per ISO 2151 and ISO 9614 with a 3 dB(A) tolerance.

60 Hz Versions

Plants on 60 Hz supplies get the same two branches under psig nameplates, with performance measured per ISO 1217 and footnotes following the 50 Hz reference conditions.

Motor ratings, noise levels, and weights carry over unchanged between the two supply frequencies, so a plant moving equipment between regions can re-plate the same machine without redesigning the installation.

The GA 75+ Branch

The plus branch fits a larger compression element behind the same 75 kW (100 hp) motor. The bigger air end turns slower for a given flow, which is why it delivers up to 257 l/s (544 cfm) on the 7.5 bar build and reads 71 dB(A) instead of 73. Buyers who expect steady output near full load get the widest flow band in the 75 kW class from this build.

Atlas Copco also reserves its longest service intervals for the plus branch: it runs an 8000-hour service interval, and its Smart Temperature Control system with intelligent sensors keeps the oil circuit in its ideal window across the seasons. For continuous duty these details translate into fewer planned stops per year.

Pack and Full Feature Builds

Both branches come as a Pack or as a Full Feature unit. The Pack measures 1680 × 1221 × 1980 mm (depth × width × height) and needs no separate foundation. The Full Feature build extends the depth to 2525 mm to house an integrated refrigerant dryer with filtration and an electronic condensate drain, wired and piped in the factory. Pressure dewpoint of the dryer holds between 2°C and 3°C (36°F to 37°F) at reference conditions, so downstream air quality does not depend on field plumbing.

Because the dryer module rides on the same frame, a Pack installation can be upgraded in place: the footprint grows along the depth axis only, and width and height stay identical.

Element, Cooling, and Canopy

Compression takes place in an Atlas Copco screw element driven through an enclosed gear transmission. There is no belt to tension and no coupling to misalign, so the element keeps running at its designed speed ratio year after year. Element, motor, oil separator, and coolers share one synthetic oil circuit that lubricates, seals, and carries heat to the coolers in a single pass.

The canopy lines every panel with acoustic material and routes cooling air across both the oil cooler and the aftercooler. All daily checks and service points sit behind panels on one side, reached from standing height, which is why the machine can stand against a wall or in a row of units.

Where the GA 75 Fits

The 7.5 bar and 8.5 bar builds suit textile air, blowing, and general manufacturing, while the 10 bar build covers assembly plants and packaging halls. The 13 bar build carries injection molding, mineral processing, and workshops feeding high-pressure tools from one network. Sites with level consumption get the lowest power draw per cubic meter of air from the fixed speed principle; where demand swings between shifts, the Compresor de aire con inyección de aceite Atlas Copco GA 250 range and the GA 75 VSD take over with variable speed control.

GA 75 FAQ

What is the difference between the two branches?

The plus branch carries a larger element behind the same 75 kW (100 hp) motor. Flow rises from 229 to 257 l/s on the 7.5 bar build, noise drops from 73 to 71 dB(A), and the service interval stretches to 8000 hours.

¿Qué versión de presión debería elegir?

Match the build to the highest pressure consumer on site and take the lowest version that covers it: 7.5, 8.5, 10, or 13 bar at 50 Hz, or 100, 125, 150, and 175 psig at 60 Hz.

How much air does the family deliver?

At 50 Hz the range spans 176 to 257 l/s (372 to 544 cfm) depending on branch and pressure version, referenced to ISO 1217, Annex C.

What does Full Feature add over the Pack?

An integrated refrigerant dryer, filtration, and electronic condensate drain, factory assembled on the same frame. The package depth grows from 1680 to 2525 mm while width and height stay unchanged.

How heavy is the machine?

The Pack weighs 1470 kg (3241 lb) and the Full Feature build 1800 kg (3968 lb); the plus builds add a few kilograms on the same footprint.

Can one machine serve both 50 Hz and 60 Hz sites?

Each machine is built for its supply frequency, but both versions share motor ratings, weights, and footprint, and the capacity tables above give exact figures for either market.