Atlas Copco GA 18 (FF TM 18⁺) Oil-injected Air Compressor

The Atlas Copco GA 18 is the 18 kW (25 hp) fixed speed oil-injected screw compressor in the GA 15-30 series. Two builds share the platform: the GA 18 itself and the GA 18+ package, which carries the integrated refrigerant dryer on its WorkPlace frame. The base machine ships floor-mounted or tank-mounted, each with or without the factory fitted Full Feature treatment. Pressure versions cover 7.5, 8.5, 10, and 13 bar at 50 Hz, while 60 Hz plants choose among 100, 125, 150, and 175 psig nameplates. Every figure from the official tables appears below, so the build and version can be matched to the duty before requesting a quotation.

Each machine arrives as one pre-assembled unit. The screw element, enclosed gear transmission, coolers, oil system, and Elektronikon Swipe controller are mounted and wired together before dispatch. Installation needs a level floor, a power connection, and an air outlet.

Especificaciones técnicas

Capacity follows ISO 1217, Annex C, Edition 4:2009, with FAD measured at effective working pressures of 7, 8, 9.5, and 12.5 bar(e). The floor-mounted weight columns appear in the table, and the tank-mounted figures follow in the package section.

Every version draws on the same 18 kW (25 hp) motor. The work station reading holds at 68 dB(A) across all four versions, measured at one meter according to ISO 2151 and ISO 9614-2 with a 3 dB(A) tolerance. The floor-mounted package weighs 464 kg and the floor-mounted Full Feature build 559 kg.

The GA 18+ Branch

Behind the unchanged 18 kW (25 hp) motor rating, the GA 18+ adds the integrated refrigerant dryer and moves onto the WorkPlace frame. Its pressure dewpoint holds at 2°C to 3°C (36°F to 37°F) at reference conditions. The mean noise level reads 65 dB(A) at 50 Hz, and the 50 Hz table follows.

On the 7.5 bar build the dryer stage keeps output within 1.5 l/s of the open frame, at 58.1 l/s (123 cfm). On the Full Feature versions the maximum working pressure prints slightly lower, at 7.3 bar (105 psig) on the 7.5 bar build and 12.8 bar (185 psig) on the 13 bar build. The package settles at 440 kg as a WorkPlace unit and 500 kg with the Full Feature treatment.

60 Hz Versions

For 60 Hz markets both builds appear under psig nameplates, measured per ISO 1217 with the footnotes and reference conditions of the 50 Hz tables.

Motor ratings stay identical across the two supplies. The base build reads 68 dB(A) at 60 Hz, the same figure as at 50 Hz, while the plus build moves from 65 to 66 dB(A). Weights carry over unchanged, so installation drawings can follow the frequency actually ordered.

Tank-Mounted and Floor-Mounted Packages

The floor-mounted GA 18 measures 1280 mm deep, 830 mm wide, and 1220 mm high. Choosing Full Feature extends depth to 1780 mm, with the integrated dryer, its filtration, and the condensate gear wired and piped in the factory. The tank-mounted frame keeps the 830 mm width and stands 1832 mm high on a 1904 mm base, while its Full Feature form reads 1827 mm high. Tank-mounted packages weigh 654 kg standard and 749 kg with Full Feature.

The GA 18+ WorkPlace frame stands 1475 mm high on a 1255 × 692 mm base. An energy recovery module is offered across the series, routing compression heat toward water heating or process duty rather than the cooler exhaust.

Installation Footprint and Service Access

The 830 mm wide base passes standard doorways whole, and the tank-mounted option removes the need for a separate receiver in compact utility rooms. The gear-driven transmission needs no belts to tension and no couplings to align, and one synthetic oil circuit lubricates, seals, and cools in a single pass.

Routine service points gather behind panels that open to standing height. The Elektronikon Swipe controller reports service and warning indications, detects errors, and shuts the machine down when a limit is reached. An optional Elektronikon Touch adds remote monitoring and service time indications.

Where the GA 18 Fits

The 7.5 bar and 8.5 bar builds serve workshops, laboratories, and general plant air. The 10 bar build matches assembly lines and packaging. The 13 bar build carries injection molding and high-pressure tool networks. Fixed speed logic rewards sites whose consumption stays level through the day. Plants one size above this class can step up to the Atlas Copco GA 22 Oil-injected Air Compressor, while sites with swinging demand should weigh the variable speed route within the same frame size first.

GA 18 FAQ

How do the two builds differ?

The GA 18+ integrates the refrigerant dryer on a WorkPlace frame. The work station reading drops from 68 to 65 dB(A), and the package moves from 464 kg to 440 kg as a WorkPlace unit.

Which pressure version fits my plant?

Pick the lowest version that covers the highest pressure consumer on site. Options run 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 produce?

Across both builds the 50 Hz tables span 41.1 to 59.6 l/s (87 to 126 cfm), referenced to ISO 1217, Annex C.

What does Full Feature include?

An integrated refrigerant dryer, filtration, and condensate management, factory assembled on the same frame. On the floor-mounted build depth grows from 1280 to 1780 mm while the 830 mm width and 1220 mm height stay put.

Tank-mounted or floor-mounted?

The tank-mounted frame carries its own receiver, weighs 654 kg standard and 749 kg with Full Feature, and suits compact utility rooms. The floor-mounted build weighs 464 kg and 559 kg at the same stages.

Can the machine give its heat back?

Yes. An energy recovery module is offered in the series and routes compression heat toward water heating or process duty instead of venting it.