Description
The Atlas Copco GA 7 is the 7.5 kW / 10 hp screw compressor of the tank-mounted WorkPlace range, the series Atlas Copco built for workshops that run compressed air without a separate compressor room. 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 21.0 l/s, and posts a mean sound level of 61 dB(A) at one meter. Every build carries the same vertical oil vessel, the belt-driven drive train and the Elektronikon controller, and the whole unit is tested and delivered ready to run.
The GA 7 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 only needs dry air from a plug-and-play GA 7 station picks the tank-mounted Full Feature unit; a plant that feeds its own treatment chain picks the pack.
The WorkPlace Concept Around the GA 7
The GA 7 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 low noise operation of the series allows installation close to 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 7 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 7 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 7
The table below condenses the variants into their headline figures:
| Parameter | Value |
|---|---|
| Installed motor power | 7.5 kW / 10 hp |
| Variants | WorkPlace pack; WorkPlace Full Feature — each floor-mounted or tank-mounted |
| Working pressure versions | 50 Hz: 7.5 / 8.5 / 10 / 13 bar(e); 60 Hz: 100 / 125 / 150 / 175 psig |
| Free air delivery | up to 21.0 l/s (46.0 cfm) |
| Noise level | 61 dB(A) mean sound pressure at 1 m (ISO 2151, tolerance 3 dB(A)) |
| Weight | 270 / 330 kg (pack floor / tank); 315 / 375 kg (Full Feature floor / tank) |
| Dimensions | Floor-mounted: 1142 x 699 x 1240 mm; tank-mounted: 1498 x 699 x 1729 mm |
| Ambient design | up to 46 degrees Celsius |
50 Hz Performance of the GA 7
Unit performance of the GA 7 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:
| Working pressure | FAD (l/s) | FAD (m³/h) | FAD (cfm) | Motor power |
|---|---|---|---|---|
| 7.5 bar(e) / 109 psig | 21.0 | 78.5 | 46.0 | 7.5 kW / 10 hp |
| 8.5 bar(e) / 123 psig | 19.6 | 70.6 | 41.5 | 7.5 kW / 10 hp |
| 10 bar(e) / 145 psig | 17.2 | 61.9 | 36.3 | 7.5 kW / 10 hp |
| 13 bar(e) / 189 psig | 14.2 | 51.1 | 30.0 | 7.5 kW / 10 hp |
60 Hz Performance of the GA 7
On 60 Hz supply the same four-version ladder is quoted in psig, and the table keeps the printed values of each version unchanged:
| Max. working pressure | FAD (l/s) | FAD (m³/h) | FAD (cfm) | Motor power |
|---|---|---|---|---|
| 100 psig / 7.4 bar(e) | 21.0 | 76.6 | 44.3 | 7.5 kW / 10 hp |
| 125 psig / 9.1 bar(e) | 19.9 | 71.7 | 42.0 | 7.5 kW / 10 hp |
| 150 psig / 10.8 bar(e) | 17.2 | 61.9 | 36.3 | 7.5 kW / 10 hp |
| 175 psig / 12.5 bar(e) | 14.2 | 51.1 | 30.0 | 7.5 kW / 10 hp |
The two tables cover the complete frequency range of the model, and the weight columns of both frequency versions stay identical, so a workshop can match the supply of its building without re-checking the installation data.
Noise, Dimensions and Weight
The mean noise level of the GA 7 is 61 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 270 kg, while the tank-mounted format measures 1498 mm long on the same 699 mm width and 1729 mm high and weighs 330 kg.
The Full Feature builds add the dryer and the filtration stage inside the same footprint and weigh 315 kg floor-mounted and 375 kg tank-mounted, which remains a one-pallet machine that a forklift moves without special equipment.
Element, Motor and Drive Train
The compression element of the GA 7 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 7 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 7 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 7 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 7 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. Every GA 7 leaves the factory tested as a complete unit. 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 7
The GA 7 covers the daily compressed air duty of automotive service and body shops, tire and brake workshops, small manufacturing cells, laboratories and construction trade workshops, where the tank-mounted Full Feature unit replaces the combination of a compressor, a receiver and a dryer with one machine.
The 10 and 13 bar versions serve higher-pressure tools and testing duties, and the 61 dB(A) operation keeps the unit beside the workbench instead of in a shed. Workshops with growing demand consolidate several small piston units onto one GA 7, and plants that step up in flow stay in the same series logic with the GA 11 of the WorkPlace range or move to the larger compact series with the GA 15 and the GA 22, which Seadweer presents with the same documentation for every pressure version.
Service and Support Around the GA 7
Service costs of the GA 7 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 7 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 7 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 7 deliver?
The GA 7 delivers up to 21.0 l/s (46.0 cfm) at 7.5 bar on 50 Hz supply and up to 21.0 l/s (44.3 cfm) at 100 psig on 60 Hz supply. At 13 bar the output is 14.2 l/s.
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 7?
The mean sound pressure level is 61 dB(A) at 1 meter according to ISO 2151 with a tolerance of 3 dB(A). That level allows the machine to stand directly in the workshop close to the point of use.
How heavy is the GA 7?
The GA 7 pack weighs 270 kg floor-mounted and 330 kg tank-mounted, and the Full Feature build weighs 315 kg floor-mounted and 375 kg tank-mounted. Every variant stays within the lifting reach of a standard forklift.
Does the GA 7 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 61 dB(A), so the unit installs close to the point of use and the separate compressor room is eliminated.
Tomasz Nowicki –
Our body shop never had a compressor room, and the old piston unit stood in the middle of the workshop like furniture nobody wanted. The GA 7 tank-mounted FF went into the corner instead, plugged into the wall, and the 61 dB(A) rating means the painters next to it never asked us to move it. The built-in dryer took care of the moisture complaints on the spray side, and the service kit arrived with the documentation for our exact version. Seadweer recommended the 10 bar model after we described the tools, and the sizing has held up over a full year of two-shift work.