Atlas Copco GA 37 (Pack FF 37⁺) Oil-Injected Rotary Screw Air Compressor

Description

The Atlas Copco GA 37 is the 37 kW entry into the GA 30⁺-90 oil-injected screw family, built for plants that plan their compressed air around a fixed operating pressure and expect the same engineering as the large machines in a smaller envelope. The model comes in two branches: the GA 37 with free air delivery up to 116 l/s and the GA 37⁺ with up to 126 l/s at the same motor rating.

Every version ships as a complete Pack with the element, motor, cooling system and controls inside a canopy only 890 mm wide, and the Full Feature branch adds the refrigerant dryer and filtration to the same frame. At 683 kg as a standard package, the GA 37 is the lightest machine of the whole family.

Small machines often carry compromises; this one does not. The GA 37 shares the Elektronikon control, the spin-on filtration concept and the service philosophy of the GA 55 to GA 90 class, so a plant that starts at 37 kW stays inside one system logic as it grows.

Where the GA 37 Fits in the Oil-Injected Range

The GA 37 sits at the lower end of the fixed speed platform, one step above the GA 30+ and one step below the GA 45, all inside the same compact frame. Plants choose it when the flow demand sits between the small workshop class and the mid range, or when a dedicated 13 bar network needs its own machine without dedicating a large frame to the duty.

The four pressure versions make the GA 37 a planning tool: one model covers the ladder from 7.5 bar workshop air to 13 bar high-pressure air. The GA 37+ branch runs the same ladder one step higher in flow, so plants with moderate growth expectations stay inside the same model choice and installation envelope.

What Pack and FF Mean

The Pack designation covers the complete compressor: element, motor, oil system, cooling circuit, controller and protective canopy, ready for connection to an external air treatment chain. The FF, or Full Feature, branch integrates the refrigerant dryer and filtration inside the package, so the delivered air leaves the machine already dried to a pressure dew point of 2 to 3 degrees Celsius.

Both branches use the same carrying frame, which keeps the installation planning identical apart from the added depth of the treatment chain.

Technical Specifications of the GA 37

The table below condenses the GA 37 into its headline figures:

50 Hz Pressure Versions

Unit performance of the 50 Hz versions is measured according to ISO 1217, Annex C, Edition 4:2009, with the FAD referenced to the effective working pressures of 7, 8, 9.5 and 12.5 bar(e), with the first four rows covering the GA 37 and the last four the GA 37+ branch:

60 Hz Pressure Versions

The 60 Hz versions follow the same design with pressures quoted in psig, and their performance is measured according to ISO 1217, annex E. The footnotes, reference conditions and FAD details of the 50 Hz versions apply:

The noise level of 67 dB(A) is the A-weighted emission sound pressure level at the work station, determined according to the noise level test code ISO 2151 and the noise measurement standard ISO 9614, with an uncertainty of 3 dB. The reference conditions are an absolute inlet pressure of 1 bar and an intake air temperature of 20 degrees Celsius, and the integrated refrigerant dryer of the Full Feature branch holds a pressure dew point of 2 to 3 degrees Celsius at these conditions. Both branches post the same 67 dB(A) figure, which makes the GA 37 one of the quietest machines in its class.

Dimensions and Weight

The Pack of the GA 37 measures 1310 mm deep, 890 mm wide and 1790 mm high, and weighs 683 kg. The Full Feature branch extends the depth to 1810 mm to house the integrated dryer and filters, keeping the 890 mm width and the 1790 mm height unchanged, and weighs 853 kg. The plus branch weighs 777 kg as Pack and 943 kg as Full Feature with the same envelope. The lightest packages of the family put the least load on floors and mezzanines, and the sub-meter width lets the GA 37 share a room with production equipment instead of claiming a machine bay of its own.

The Maintenance-Free Drive Train

Motor and Direct Drive

The GA 37 carries a Super Premium efficiency electrical motor design with IP55 protection, insulation class F and a temperature rise class B that keeps the windings well inside their limits. The motor drives the element directly, with no coupling and no slippage losses between the two, so the shaft power reaches the compression element unchanged. The non-drive side bearing is greased for life, which removes it from the maintenance schedule entirely, and the whole drive system is totally enclosed and protected against dirt and dust. The machine runs in ambient conditions up to 46 degrees Celsius as standard, with a high ambient version rated for 55 degrees Celsius.

Filtration on the Air and Oil Side

The oil system runs through a robust spin-on oil filter that removes particles 300 percent smaller than a conventional filter, with an integrated bypass valve that keeps the element supplied if the filter clogs. The intake side uses a heavy-duty air filter that removes 99.9 percent of dirt particles down to 3 microns, and the inlet pressure drop is monitored so the filter element is renewed on condition. Together the two stages protect the element, the oil separator and the cooler block across the whole service interval of the GA 37.

Smart Features on the Plus Branch

EQ2i Dual Compressor Control

The GA 37+ comes with the built-in EQ2i multiple compressor control as standard, which allows the machine to manage a second compressor in the same network. For a workshop that runs a small backup unit or adds a second machine during peak hours, the EQ2i keeps both compressors inside a narrow pressure band and balances their running hours automatically. The GA 37+ therefore anchors a two-machine room without an external sequencer, and the electronic no-loss water drain is standard on this branch as well.

Protection and Air Quality Options

Freeze protection and a tropical thermostat prepare the GA 37 for cold or hot climates, and the high ambient version extends operation to 55 degrees Celsius. The UD+ filter can be combined with the integrated dryer of the Full Feature branch to reach air quality Class 1.4.2 according to ISO 8573-1:2010 with a single filter stage, using one element where a conventional combination would need two.

Full Feature: Dryer and Filters Inside the Package

The Full Feature branch turns the GA 37 into a complete air quality station. The refrigerant dryer is sized for the compressor and holds the pressure dew point between 2 and 3 degrees Celsius under all circumstances, preventing freezing at low load. Downstream, the filtration stage polishes the air to the quality class the application needs, and the no-loss condensate drain removes water without wasting compressed air. Controlled and monitored by the Elektronikon, the dryer reports its status on the same panel that runs the compressor.

Dew Point and Condensate

Condensate from the dryer and the oil separator contains oil traces and must be handled correctly. The electronic no-loss drain discharges it to the condensate management point without releasing air, and the controller supervises the drain so a fault is flagged on the panel instead of going unnoticed. Plants that feed the condensate to an oil-water separator get a clean, compliant discharge path.

Control and Connectivity

The control principle of the fixed speed platform is built around the load band. The GA 37 loads when the header pressure approaches the lower limit and unloads when it reaches the setpoint, and the Elektronikon keeps the number of these transitions low through intelligent band planning. Between load phases the machine idles rather than stops, which keeps the oil separation stable and avoids the wear that frequent restarts would bring to the motor and the element.

Elektronikon Touch

The Elektronikon Touch controller is available as an option for the GA 37. It features a 4.3-inch multilingual display with clear pictograms and a service indicator, and its operating system offers control and monitoring options with smart algorithms that optimize compressor performance. Customized timers and efficiency controls are part of the package. SMARTLINK remote monitoring and OPC UA connectivity integrate the compressor into the production monitoring system, so the GA 37 appears on the factory dashboard alongside the rest of the line.

Applications of the GA 37

The GA 37 covers the daily duties of workshops and smaller production plants: general machinery shops, packaging and filling lines, laboratories, and service businesses that run compressed air all day. The 13 bar version serves high-pressure users such as die cutting and pressure testing benches, while the 7.5 bar version maximizes the flow for plants that run a single standard header. Workshops that currently operate an aging piston compressor move to the GA 37 for the rotary screw efficiency, the low noise level and the sealed drive train, and plants that outgrow it step into the GA 45 on the same frame logic.

Service and Support Around the GA 37

The service points of the GA 37 are grouped for access, and the spin-on filters make the routine services a short planned stop instead of a project. Atlas Copco fluids and lubricants are tailored to the platform with anti-oxidation additives that hold their protective qualities across the service interval, and the Elektronikon tracks the remaining lifetime of every consumable. Steady loading, adequate receiver volume and clean intake air are the three habits that decide the lifetime of the machine. For a replacement element on the oil-injected platform, see the OIS O-06 Oil-Injected Screw Element. Seadweer supports the GA 37 and its Full Feature branch with original spare parts, service kits and technical documentation for every pressure version.

FAQ

Which pressure versions does the GA 37 offer?

At 50 Hz the GA 37 is available in 7.5, 8.5, 10 and 13 bar(e) versions, and at 60 Hz in 100, 125, 150 and 175 psig versions. Each version delivers between 88 and 126 l/s depending on the setting and the branch.

How much air does the GA 37 deliver?

The 7.5 bar version delivers 116 l/s (245 cfm), and the 13 bar version delivers 88 l/s (187 cfm). The plus branch delivers up to 126 l/s (266 cfm) at 7.5 bar, and the 60 Hz versions reach up to 124 l/s at 100 psig.

What is the difference between the GA 37 and the GA 37⁺?

Both branches share the same frame, motor rating and pressure ladder. The GA 37+ adds the built-in EQ2i control that manages a second compressor and carries the electronic no-loss water drain as standard, while the base GA 37 offers these features as options.

What is the difference between Pack and FF?

Pack is the complete compressor without integrated air treatment, while FF, the Full Feature branch, integrates the refrigerant dryer and filtration inside the same canopy. The FF branch is 500 mm deeper and 170 kg heavier than the Pack.

How loud is the GA 37?

The sound pressure level at the work station is 67 dB(A) for both branches, determined according to ISO 2151 and ISO 9614 with an uncertainty of 3 dB. That level allows the machine to sit close to production areas.

How heavy is the GA 37?

The standard package weighs 683 kg and the Full Feature branch 853 kg, with the plus branch at 777 kg and 943 kg. These are the lightest figures in the GA 30+-90 family, which eases floor loading and installation planning.