ga90-315 power point rev3
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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