Atlas Copco LP Compressor Element Exchange Kit Replacement – 2906085000

The Atlas Copco 2906085000 is a Low-Pressure (LP) Compressor Element Exchange Kit used for servicing/replacing the LP compressor element in applicable ZR55–90 + IMD260W systems. The kit provides the required sealing components for exchanging the LP element and restoring reliable, leak-free connections during reassembly.

The official Atlas Copco listing gives the kit weight as approximately 140 g and specifies multiple O-rings as kit components.

Working Process

1. Air Intake – Atmospheric air enters the LP compressor stage.
2. LP Compression – The LP element compresses the incoming air.
3. Heat & Pressure Generation – Compression increases air pressure and temperature.
4. Element Operation – The LP element operates continuously under mechanical load.
5. Wear/Service Requirement – After the applicable service interval or when element condition requires it, the LP element is exchanged.
6. Isolation – The compressor is shut down, electrically isolated and fully depressurized.
7. Element Exchange – The existing LP element is removed and replaced.
8. Seal Replacement – O-rings supplied with 2906085000 are installed on the relevant connections.
9. Reassembly – The LP element and associated connections are correctly reassembled.
10. Leak Testing – The system is pressurized and checked for leakage.
11. Performance Verification – Compressor pressure, temperature, vibration and operating condition are checked.

Kit Components

Atlas Copco’s official product listing specifies the following components:

Main Functions

• Supports LP compressor element exchange.
• Provides replacement sealing components.
• Helps prevent compressed-air leakage.
• Maintains proper sealing after element replacement.
• Supports reliable ZR55–90 compressor operation.
• Helps restore compressor performance after LP element servicing.

Typical Reasons for Element Exchange

An LP element may require replacement because of:

• Increased vibration.
• Abnormal operating noise.
• Reduced compressor capacity.
• Increased operating temperature.
• Increased power consumption.
• Internal wear.
• Deteriorated compressor performance.
• Scheduled major maintenance.

Maintenance / Exchange Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate and lock out the electrical supply.
3. Fully depressurize the compressor.
4. Allow the equipment to cool.
5. Isolate associated air and cooling/lubrication connections as applicable.
6. Remove the existing LP compressor element.
7. Inspect shafts, mounting surfaces and associated components.
8. Clean all mating surfaces.
9. Install the replacement LP element.
10. Replace the applicable O-rings using 2906085000.
11. Ensure all seals are correctly positioned.
12. Reconnect the associated piping and components.
13. Tighten connections according to the applicable Atlas Copco specifications.
14. Gradually pressurize the system.
15. Check all serviced connections for leakage.
16. Restart the compressor.
17. Monitor pressure, temperature, vibration and noise.
18. Confirm normal compressor performance.

Technical Summary

Recommended catalog title:
Atlas Copco 2906085000 – ZR55–90 + IMD260W LP Compressor Element Exchange Kit, 2906-0850-00.

Atlas Copco’s official product page confirms “ZR55-90+IMD260W LP ELM EXCHKIT”, while an Atlas Copco parts list identifies 2906 0850 00 as the LP compressor element exchange kit for ZR75 VSD with IMD260.

Compatibility note: Confirm the compressor model, IMD configuration and serial number before ordering, as LP element exchange kits are configuration-specific.