1 XAS 375 CD6 Compressors Scott Ellinger Committed to sustainable productivity
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XAS 375 CD6 Compressors
Scott Ellinger
Committed tosustainable productivity
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Technical Specifications - XAS 375 CD6
Technical Specifications - XAS 375 CD6
Product Nomination Oil Injected CompressorsNomination and grouping
Principle data Compressor systems Running conditions Electrical system Instrument panel
X A T S 375 C D
Product rangeX : Oil injected portable compressor
Working principleA : Single stage compressorR : Two stage compressor
Working pressure
: standard pressure 102psiT : “ten” pressure 150psiH : high pressure 175psi
Silencing : Un-silencedS : Silenced
Capacity (FAD)Liter/secCFM (US-version)
Engine supplierC : CaterpillarD : DeutzJ : John DeereY : YanmarK : Kabota
Prime moverd : diesel engineE : electric motor
Compressor systems
Four major components :
– Air system
– Oil system
– Regulating system
– Electrical system
Air system
Air filter Compressor Element (AFCE) (with
vacuator valve VV, Safety Cartridge SC and vacuum indicator VI)
Unloading Valve (UV)
Compressor Element (CE)
Temperature Switch (TS)
Check Valve (CV)
Air Receiver (AR)
Non Return Valve
Minimum Pressure Valve (MPV)
Air Outlet Valve (AOV)
Air system
Air filter
Filtration of the inlet air in 3 stages :
– centrifugal dust separation
– paper filter element
– safety cartridge (optional) Vacuum indicator gives an indication when the pressure drop over
the filter element is too high filter element needs to be replaced
Air filter
Air inlet Centrifugal separation
Dust
Filter element
to compressor element
Vacuum indicator
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REGULATING SYSTEM REG VALVE
Spring loaded
Adjusting receiver pressureby changing spring tension
• to pressure gauge and loading valve
• to speed regulator• to unloading valve
Regulating pressure:
Receiver pressure
The air receiver pressure can be set to another value by adjusting the spring tension of the regulating valve. This is done by turning the handle on top the valve. Increasing the spring tension, by turning in, will increase the regulating pressure and consequently the pressure inside the vessel. Turning out will decrease the pressure.
In order to regulate the pressure inside the reciever tank of our compressor, the air intake and the engine speed have to be controlled. This is done pneumatically. For that reason, we need regulating pressure. The regulating valve reduces the pressure inside the tank, thus providing the regulating pressure. This regulating pressure is then supplied to the unloader valve and the speed regulator or RPS.
Regulating Valve Service Kit – 2911 0090 00
Unloading valve
Opens and closes the air inlet to the compressor element.
– Open position at load condition=> Air consumption
– Closed position at no load condition=> No air consumption.
Control of the valve by regulating pressure.
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Unloading Valve or Air System Inlet Valve
Spring loaded in the open position
Control Air closes the inlet
Also serves as check valve
Legend
Receiver Pressure
From Pressure Regulator right now very low to zero pressure
Unloading valve service kit – 2911 0074 00
No-Load Condition Load Condition
Unload Condition Blow- Down Condition
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Maintains a minimum pressure
of 58 PSI for oil flow
Also contains the final check
valve
AIR SYSTEM MIN PRESS VALVE
OIL SYSTEM
Oil System (old style)
Air receiver
Oil cooler
Oil filter
Compressor element
Oil separator
Scavenge line
Nomination and grouping
Principle data Compressor systems Running conditions Electrical system Instrument panel
Oil System (new style)
Air receiver
Oil cooler
Oil filter/TBV
Compressor element
Oil separator
Scavenge line
Oil injected screw compressors
Compressor element
Oil
Oil
Air/Oil
Greasing to the bearings
Air inlet
Oil injected screw compressors
Oil is used for :
– Cooling : compression heat is absorbed by the oil
– Lubrication of rotors, bearings, gears
– Sealing between rotors and rotor and housing
– Corrosion protection of the internal metal parts
Oil injected screw compressors
Oil is injected in the bottom of the rotor housing,
on the bearings and gears
Compression principle
Com
pres
sion
sta
rt
Com
pres
sion
Suc
tion
Del
iver
y
Oil separator
Air/Oil
Centrifugal separation
Separator element
Oil
Scavenge line
Oil Separator filter element should be replaced
Every 1,000 hours or yearly.
Oil Separator
Classic Reasons For Oil Carryover– Over filled receiver
– Plugged scavenge line
– Wrong type of oil (no anti foam agent)
– Shut down with air outlet valves open
– Scavenge tube installed improperly
Separator Element Service Kit – 1604 0386 83
Control Panel
Starting and Stopping Instructions
Start Up: Open a discharge ball valve. Once the engine is running, the valve can be closed and the unit run until warm.
After warm up, press the load button. Engine speed will increase and the unloader valve will open and the unit will build air pressure.
Pressure Setting: Standby pressure should not exceed 120 psi. Unit is designed to deliver 375 CFM at 100 psi.
Stopping: Close all air discharge ball valves. Depress the load button and the engine will continue to run as the air pressure in the system slowly bleeds off.
Turn off compressor. Unloader valve will bleed off remainder of air pressure from the tank.
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Schematic – XAS 375 CD6
Maintenance – XAS 375 CD6
Preventive Maintenance Filter Kits – XAS 375 CD6
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Contact Numbers
• Main Number Atlas Copco Technical Support 1-800-732-6762 Option 3
• Clayton Jones - Hurricane Boosters/Compressors - Supervisor1-216-643-6802 direct & 1-317-681-4602 mobile
• Andrew Stevenson – Compressors: Low Pressure1-720-479-2486 direct & 1-404-751-6717 mobile
• Will Hudson – Generators/Compressors 1-800-732-6762 Ext. 12920 & 1-832-454-8123 mobile
• Andrew Calendar – Compressors: High Pressure1-720-479-2487 direct & 1-404-242-6203 mobile
• Jon Monaco - Hydraulic Att./Handheld Tools 1-800-732-6762 Ext. 12929 & 1-216-816-5008 mobile
• Brandon Dyer – Compressors: Low Pressure/Hydraulic Att.1-216-643-6807 direct & 1-216-219-2290 mobile
• Scott Ellinger – Compressors1-720-479-2476 direct & 1-720-375-1795 mobile
Committed tosustainable productivity.