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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.