Atlas Copco Aftercooler Service Kit Replacement – 2906037900

The Atlas Copco 2906037900 is an Aftercooler Service Kit used for maintenance of the aftercooling system on applicable ZR110–275 oil-free compressors. Atlas Copco officially identifies it as the ZR110-275 Aftercooler Kit.

The aftercooler reduces the temperature of compressed air after the compression stages. Cooling the compressed air also allows moisture to condense, which can then be removed by the condensate-drain system.

Working Process

1. Air Compression – Atmospheric air is compressed through the compressor stages.
2. Temperature Increase – Compression causes the air temperature to rise.
3. Hot Compressed Air Flow – The hot air enters the aftercooler.
4. Heat Transfer – Heat moves from the compressed air through the cooler’s heat-transfer surfaces to the cooling medium.
5. Air Cooling – The compressed-air temperature is reduced.
6. Moisture Condensation – Cooling causes part of the water vapor to condense.
7. Condensate Removal – The condensate is directed toward the appropriate drain system.
8. Cooled Air Delivery – The cooled compressed air proceeds to the downstream system.
9. Continuous Operation – The aftercooler continuously removes heat while the compressor operates.

Main Functions

• Provides components for aftercooler servicing.
• Restores effective heat-transfer performance.
• Maintains suitable compressed-air temperature.
• Supports condensate management.
• Helps prevent excessive compressor temperature.
• Reduces the risk of cooling-system leakage.
• Supports reliable ZR compressor operation.

Possible Failure Symptoms

A contaminated, damaged or leaking aftercooler can contribute to:

• High compressed-air temperature.
• Reduced cooling efficiency.
• Excessive condensate problems.
• Air or cooling-medium leakage.
• Increased operating temperature.
• Higher energy consumption.
• Temperature alarms.
• Compressor shutdown.

Maintenance Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Fully depressurize the compressor.
4. Allow the aftercooler to cool.
5. Isolate the applicable cooling circuit.
6. Remove the required aftercooler service components.
7. Inspect the cooler for fouling, corrosion and leakage.
8. Clean the relevant surfaces and passages.
9. Replace the applicable service components using 2906037900.
10. Ensure seals and connections are correctly installed.
11. Reassemble the aftercooler.
12. Restore the cooling and compressed-air circuits.
13. Restart the compressor.
14. Check for leakage.
15. Monitor discharge-air temperature and cooling performance.

Technical Summary

The Atlas Copco parts listing confirms 2906037900 as the ZR110–275 Aftercooler Kit, while parts references identify it as an aftercooler service kit for ZR110–145 and related ZR models.

Recommended catalog title:
Atlas Copco 2906037900 – ZR110–275 Aftercooler Service Kit, 2906-0379-00.

Compatibility note: Verify the compressor model and serial number before ordering, as the exact cooler configuration can vary between machine versions.