Oil injected Rotary Screw Air Compressors

GA 90GA 90--315315

• Single Stage• Air or Watercooled• Complete Package• Available with integrated

refrigerated dryer (Full Feature)

GA 90GA 90--315315

Proven Technology / Superior Engineering

• Efficient• Reliable• Easily Maintained

GA 90GA 90--315315

GA 90GA 90--315 Product Range315 Product Range

Product Range• Power: 125 – 350hp• Capacity: 405-1647cfm• Pressure variants: 100, 125,

150, 200 psig

Note: GA200 has 100, 125, and 150 psig variants

Air Inlet System• Heavy-duty inlet

filter/silencer– Easy to service

replaceable dry paper cartridge

– 3 micron rating• ∆P sensor for filter• Air inlet valve with load/no-

load control

GA 90GA 90--315 Air Inlet System315 Air Inlet System

GA oilGA oil--injected rotary screw elementinjected rotary screw element

4 positive displacement compressor4 Atlas Copco asymmetrical rotor profile4 most efficient combination: 4/6 ratio 4 Male rotor = 4 equally spaced helical lobes4 Female rotor = 6 equally spaced flutes4 delivers pulsation-free compressed air

COMPRESSION PRINCIPLE

discharge side

inlet side4 roller (radial) bearings4 low-pressure side

4 paired set 4-point contact ball bearings (axial) and cylindrical roller bearings (radial)

4 high-pressure side

GA oilGA oil--injected rotary screw elementinjected rotary screw elementBEARING DESIGN

GA oilGA oil--injected rotary screw elementinjected rotary screw element

4 rotary screw element & motor are permanently aligned

4 flexible coupling design reduces starting torque stress

4 GA90-315 is driven by a high efficient, TEFC electric motor (IP-55, class-F insulation)

4 both compressor elements of the GA200-315 unit are bolted to a common gear casing

4 main drive gear drives the pinion gear of both compressor element

DRIVE ARRANGEMENT

GA 90-160 Single Stage

GA200-315 Twin Element

Drive Motor• The WEG motor is standard

– TEFC– High-efficiency– 460 voltage– 1800 RPM– Wye-delta starting– Class F insulation– Other voltages available

GA 90GA 90--315 Drive Motor315 Drive Motor

Oil System• Factory fill HD Rotofluid

(8000 hr lifetime)• Easy access spin-on oil

filters• Inverted position allows the

excess oil to drain – no messy drips or spills

• Hinged air/oil separator tank cover– Swivels out of the way for easy

element replacement

GA 90GA 90--315 Oil System315 Oil System

Ease of Maintenance• Oil changes are easy:

– Easy accessed oil drains and filler plugs

– Flexible oil drain hoses assist in clean easy oil changes

– Oil drain plugs and filler caps are color coded for simple identification

GA 90GA 90--315 Oil System315 Oil System

Oilcooler and Aftercooler (Aircooled)

• High efficiency fin designed heat exchangers

• Coolers are mounted on rubber buffers to avoid vibration and thermal stress

• Flexible compensators ensure stress-free connections

GA 90GA 90--315 Coolers315 Coolers

Oilcooler and Aftercooler (Aircooled)

• Axial cooling fans with TEFC fan motors

• Fan guards, housings and motor installed on hinged assembly– Simple maintenance

• Standard air/water separator

GA 90GA 90--315 Coolers315 Coolers

Oilcooler and Aftercooler (Watercooled)

• Brazed plate stainless steel heat exchanger

• Aftercooler and oilcooler combined into one compact combi-cooler

• No gaskets– Eliminates possibility of leaks

air in

air out

oil out

oil in

GA 90GA 90--315 Coolers315 Coolers

Cool Side• Electrical enclosure, motor

and starter panel• Air inlet

– Optimal inlet capacity efficiency

Warm Side• Compressor element, air/oil

separator tank and oil filters– Excess water condensate in

lubricant averted by properly maintained air/oil temperatures

Cool side Warm side

Separated component compartments

GA 90GA 90--315 Component Compartments315 Component Compartments

Insulation

CondensateOil

Incoming gas

Air/oil mixtureWet air

Dry air

Refrigerant liquid

Refrigerant gas/liquidRefrigerant gas

Compressed refrigerant gas

GA 90GA 90--160 FF Flow Diagram (160 FF Flow Diagram (AircooledAircooled))

Refrigerant Liquid

Refrigerant Gas/Liquid

Refrigerant Gas

Compressed Refrigerant Gas

Insulation

Condensate

Oil

Incoming Gas

Air/Oil Mixture

Wet Air

Dry Air

GA 200GA 200--315 FF Flow Diagram (315 FF Flow Diagram (AircooledAircooled))

• LCD Displays– Operating pressures and

temperatures– Adjustable set points– Service messages– Alarm messages– Shutdown messages– LCD readouts available in

several languages• LED Indicators

– Voltage on– Automatic operation– General alarm

GA90GA90--315 315 ElektronikonElektronikon Control Module Control Module

• Operating Modes– Local control– Remote control – MCC control

• Control and Regulation– Programmable start/stop– Automatic and manual

load/unload– Programmed stop– Controlled stop– Emergency stop

GA90GA90--315 315 ElektronikonElektronikon Control Module Control Module

Standard Standard OptionsOptions

Full Feature Full Feature Integrated Refrigeration DryerIntegrated Refrigeration Dryer

Dry Air as standard option on aGA Full FeatureFull Feature unit

4 refrigeration type air dryer completely integrated

4 uses R 404 refrigerant gas to meet environmental regulations

4 ensures quality end-product and system protection

4 by-pass valve included as standard

Quality Air Quality Air Integrated DD FilterIntegrated DD Filter

Dry Quality Air with integrated DD filterintegrated DD filter

4 air outlet filter as standard option

4 particle removal down to 1 ppmand maximum remaining oil aerosol of 0.1 ppm

4 class 2.4.2 dry quality air according to ISO8573-1

Modulating ControlModulating Control

Modulating Control PrincipleModulating Control Principle

4 capacity modulates from 50-100%4 pressure band: 3 psig

PRESSURE SETTINGS ON MODULATION CONTROL

116SA

VIN

GS

100

80

60

40

20

0

% LOAD 0 25 50 75 100

MODULATING CONTROL

LOAD / NO LOAD CONTROL

Environmental ProtectionEnvironmental Protection

Oil Separating Device (OSD)Oil Separating Device (OSD)

4 OSD315 for the compressor unit4 separate OSD90 for the integrated

dryer4 completely integrated in the

compressor unit4 effluent purity of 10 mg oil/liter

(.000083lb oil/gal)

Oil Containing FrameOil Containing Frame

4 contains oil in case of leakage

Climatic ConditionsClimatic Conditions

HAT versionHAT version

4 for high ambient temperature operating conditions up to 122°F

4 available for 100, 125, 150psig versions

4 not foreseen on Full Feature units

Cooling air outlet Cooling air outlet ductingducting

4 divert exhaust hot air away from

cooling air inlet grating

Rain ProtectionRain Protection

4 for units in outdoor installation

Electronic Water Drain Electronic Water Drain (EWD)(EWD)

4 efficient automatic condensate draining

4 warning signal foreseen

HeavyHeavy--duty intake duty intake filterfilter

4 prolongs the life of air intake filter in dusty installation

drive motor Options:drive motor Options:

4 anti-condensation heaters

4 PT 1000 thermal protection

Phase sequence relayPhase sequence relay

prevents reverse rotation of 3 drive motor

Anchor padsAnchor pads

4 secures further the compressor unit to the ground

Unit ProtectionUnit Protection

Oil injected Rotary Screw Air Compressors

GA 90GA 90--315315