Atlas Copco GA 5 (FF TM) Oil-Injected Rotary Screw Air Compressor

Description

The Atlas Copco GA 5 is the 5.5 kW / 7.5 hp entry of the tank-mounted WorkPlace range and the smallest screw compressor of the whole oil-injected line, built for workshops that want rotary screw reliability at the lowest power rating. The model comes in four pressure versions from 7.5 to 13 bar(e) on both 50 Hz and 60 Hz supply, delivers up to 15.0 l/s, and posts a mean sound level of 60 dB(A) at one meter, the quietest figure of its series. Every build carries the vertical oil vessel, the belt-driven drive train and the Elektronikon controller, and the unit is delivered tested and ready to run.

The GA 5 exists as a WorkPlace pack and as a WorkPlace Full Feature build, each in a floor-mounted and a tank-mounted format, and the sections below keep the variants side by side. A workshop that feeds its own treatment chain picks the pack; a workshop that wants one machine for the whole air side picks the tank-mounted Full Feature unit.

The WorkPlace Concept Around the GA 5

The GA 5 belongs to the GA 5-11 WorkPlace series, which integrates the air treatment equipment on the machine and mounts the air receiver underneath the compressor, so the need for a separate compressor room is eliminated. The 60 dB(A) operation of the GA 5 allows installation directly at the point of use, which shortens the piping runs and holds the pressure drop in the network down.

All compressors of the series, the GA 5 included, are delivered ready for use, which reduces the installation costs to a minimum, and the design, manufacture and testing of the GA range follow ISO 9001, ISO 14001 and ISO 1217, Ed. 4, Annex C/E. The fixed-speed GA 5 is also joined in the range by the GA VSDs variable-speed models, which Seadweer presents on their own pages.

What Pack and Full Feature Mean

The WorkPlace pack contains the complete compressor: element, drive train, cooling system, oil vessel and Elektronikon controller inside the sound-proofed canopy, with a water separator included as standard on the pack. The WorkPlace Full Feature build adds the integrated refrigerant dryer, the DD/PD filtration stage connections and the no-loss condensate handling inside the same enclosure, and it delivers a pressure dew point of 3 degrees Celsius at 100 percent relative humidity and 20 degrees Celsius ambient. Optionally, the system expands with integrated filter kits that bring the residual oil content down to class 1 level at 0.01 ppm, so the Full Feature build covers quality-critical applications without external hardware.

Technical Specifications of the GA 5

The table below condenses the variants into their headline figures:

50 Hz Performance of the GA 5

Unit performance of the GA 5 is measured according to ISO 1217, Ed. 4, Annex C-2009, with the FAD determined at 7 bar(e) for the 7.5 bar versions, at 8 bar(e) for the 8.5 bar versions, at 9.5 bar(e) for the 10 bar versions and at 12.5 bar(e) for the 13 bar versions:

60 Hz Performance of the GA 5

On 60 Hz supply the GA 5 keeps the same four-version ladder, quoted in psig, and the table keeps the printed values of each version unchanged:

The two tables cover the complete frequency range of the model with identical FAD figures, so a workshop can match the supply of its building without re-checking the air side of the installation.

Noise, Dimensions and Weight

The mean noise level of the GA 5 is 60 dB(A), measured at a distance of 1 meter according to ISO 2151 with a tolerance of 3 dB(A), and the same figure applies to every pressure version and both 50 Hz and 60 Hz supply. The floor-mounted pack measures 1142 mm long, 699 mm wide and 1240 mm high and weighs 257 kg, while the tank-mounted format measures 1498 mm long on the same 699 mm width and 1729 mm high and weighs 317 kg.

The Full Feature builds add the dryer and the filtration stage inside the same footprint and weigh 300 kg floor-mounted and 360 kg tank-mounted, which keeps every variant within the reach of a standard forklift and most service elevators.

Element, Motor and Drive Train

The compression element of the GA 5 is combined with an IE3 efficiency motor and an improved bearing and seal arrangement, which keeps the energy costs of the unit minimized over its service life. The drive train is belt-driven and was developed in accordance with the highest industry standards, and the optimized packaging of the GA 5 increased the free air delivery by up to 8 percent while reducing the power consumption by 7 percent.

The component design suits environments with ambient temperatures up to 46 degrees Celsius, and the vertical high-tech oil vessel protects the compressed air from oil contamination with an extremely low oil carryover, while its minimized size cuts the compressed air losses during the load and unload cycle.

Air Quality and the Integrated Dryer

The Full Feature build of the GA 5 integrates the refrigerant dryer of the new range, which saves on average 30 percent of dryer energy and uses the energy-efficient R134a refrigerant with a significantly reduced global warming potential thanks to the lower refrigerant charge. A low pressure drop heat exchanger with an integrated water separator feeds the no-loss condensate drain, so no treated compressed air is wasted, and the unique Saver Cycle Control with its ambient temperature sensor starts and stops the dryer based on the dryer load and the relative humidity of the compressed air.

The pressure dew point of the integrated dryer is 3 degrees Celsius, and the delivered air quality follows the ISO quality classes: the pack with its water separator holds class 3.-.4, the Full Feature build holds 3.4.4, and the integrated filter kits lift the air to class 2.4.2 at 0.1 ppm or class 1.4.1 at 0.01 ppm residual oil.

Elektronikon Control and Saver Cycles

The Elektronikon controller of the GA 5 regulates the main drive motor and holds the system pressure inside a predefined and narrow band, and its monitoring features cover service and warning indications, error detection and compressor shut-down. A web-based online compressor status viewer runs on a standard Ethernet connection, so the machine status is visible from a browser without extra hardware, and an upgrade to the Elektronikon graphic controller adds further visual service indications.

The controller carries the dual pressure set point for two different system pressure bands, the automatic restart after voltage failure and the Delayed Second Stop function, which runs the drive motor only when the demand really calls for it. The saver cycle technology links the controller to both the fan and the dryer: the fan saver cycle regulates the cooling fan from the oil temperature, and the dryer saver cycle stops the dryer when the compressor has stopped, which protects the network from corrosion and minimizes the energy use at the same time.

For installations of up to four or six machines, the optional ES4i or ES6i integrated compressor controller reduces the system pressure and the energy consumption of the whole group with a single license.

Installation and Receiver Options

The GA 5 is a true plug-and-play solution: it installs close to the point of use, it is effortless to transport by forklift, and it comes standard equipped with a 3 meter power supply cable. The tank-mounted format carries a factory-mounted 270 liter receiver under the compressor, and an optional 500 liter receiver extends the buffer for cyclic demands.

Options adapt the machine to demanding sites: an integrated oil and water separator, an electronic water drain on the pack cooler or on the 500 liter vessel, a dryer bypass, a phase sequence relay, a tropical thermostat, freeze protection, a heavy duty inlet filter, rain protection, a main power isolator switch, modulating control, high ambient temperature versions, food-grade oil, Roto-Xtend duty oil, a compressor inlet pre-filter, a motor space heater with thermistors and relays for an ES 100 sequence selector.

Applications of the GA 5

The GA 5 covers the compressed air duty of dental and medical workshops, laboratories, tire and brake service, small assembly and packaging benches and craft workshops, where one quiet GA 5 replaces a piston compressor with its treatment chain. The 10 and 13 bar versions serve higher-pressure tools and small testing duties at the lowest power rating of the range, and the 60 dB(A) operation puts the unit directly behind the workbench. Workshops with growing demand step up through the GA 7 and the GA 11 of the same WorkPlace series to the GA 22 of the compact series, and Seadweer supports every step with the documentation of each pressure version.

Service and Support Around the GA 5

Service costs of the GA 5 stay minimized thanks to high-quality and easily replaceable consumables with a long lifetime, and the Elektronikon schedules the service plan before a consumable reaches its limit. Seadweer supports the GA 5 in every variant with original spare parts, service kits and technical documentation matched to the exact pressure version and supply frequency of the installation.

FAQ

Which pressure versions does the GA 5 offer?

The 50 Hz range covers 7.5, 8.5, 10 and 13 bar(e) versions, and the 60 Hz range covers 100, 125, 150 and 175 psig versions. The Full Feature build trades a small share of the maximum working pressure for its integrated dryer.

How much air does the GA 5 deliver?

The GA 5 delivers up to 15.0 l/s (31.7 cfm) at 7.5 bar and 8.4 l/s at 13 bar. The FAD figures are identical on 50 Hz and 60 Hz supply.

What is the difference between the pack and the Full Feature build?

The pack is the complete compressor with water separator, while the Full Feature build adds the integrated refrigerant dryer and the condensate handling inside the same canopy. The Full Feature build delivers a 3 degrees Celsius pressure dew point, and both variants exist floor-mounted or with the receiver mounted under the machine.

How loud is the GA 5?

The mean sound pressure level is 60 dB(A) at 1 meter according to ISO 2151 with a tolerance of 3 dB(A). That is the quietest figure of the series and allows the machine to stand directly beside the workbenches.

How heavy is the GA 5?

The pack weighs 257 kg floor-mounted and 317 kg tank-mounted, and the Full Feature build weighs 300 kg floor-mounted and 360 kg tank-mounted. Every variant stays within the lifting reach of a standard forklift.

Does the GA 5 need a separate compressor room?

No. The WorkPlace concept integrates the air treatment on the machine, mounts the receiver underneath on the tank-mounted formats and keeps the noise at 60 dB(A), so the unit installs at the point of use and the separate compressor room is eliminated.