Atlas Copco HP Element Mounting / Exchange Kit Replacement – 2906017200

The Atlas Copco 2906017200 is an HP (High-Pressure) Element Mounting/Exchange Kit used when servicing or replacing the high-pressure compressor element in applicable oil-free ZR/ZT compressors. Parts references list it as “KIT, ELEMENT MOUNTING HP,” while application-specific listings identify it as the ZR/ZT 75–90 HP Element Exchange Kit.

The HP element is the later compression stage. Air that has already been compressed and cooled after the LP stage enters the HP element, where it is compressed to the final required pressure.

Working Process

1. LP Compression – Air is initially compressed in the low-pressure element.
2. Intercooling – The compressed air is cooled before entering the HP stage.
3. HP Air Intake – The cooled intermediate-pressure air enters the HP element.
4. High-Pressure Compression – The HP element further compresses the air to the required pressure.
5. Heat Generation – The second compression stage again increases air temperature.
6. Aftercooling – The high-pressure air subsequently passes through the aftercooler.
7. Final Air Delivery – The cooled compressed air is delivered to the downstream air system.
8. Element Mounting – Correct mounting and alignment of the HP element are essential for efficient compression.
9. Sealing – Mounting/sealing components prevent unwanted air leakage and maintain pressure integrity.

Main Functions

• Supports HP compressor-element replacement.
• Provides mounting/service components for the HP element.
• Maintains correct element alignment.
• Helps maintain airtight connections.
• Prevents compressed-air leakage.
• Supports efficient high-pressure compression.
• Helps restore compressor performance after HP-element replacement.

Why the HP Element Is Important

The HP element performs the final major compression stage in the applicable two-stage ZR/ZT compressor arrangement.

A correctly installed HP element helps maintain:

• Correct rotor alignment.
• Stable compression.
• Proper pressure ratio.
• Efficient airflow.
• Reliable compressor operation.
• Reduced leakage.

Possible Failure Symptoms

A worn HP element or incorrect mounting can cause:

• Reduced compressed-air capacity.
• Higher discharge temperature.
• Increased power consumption.
• Excessive vibration.
• Abnormal compressor noise.
• Air leakage.
• Reduced compression efficiency.
• Unstable operating pressure.
• Increased load on the compressor.

Maintenance / HP Element Exchange 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 compressor to cool.
5. Disconnect the relevant air and service connections.
6. Remove the existing HP element.
7. Inspect the mounting surfaces and associated components.
8. Clean the mating surfaces.
9. Install the replacement components supplied with 2906017200.
10. Position the new HP element correctly.
11. Check element alignment and mounting.
12. Tighten the assembly according to the applicable Atlas Copco specifications.
13. Reconnect all air and service connections.
14. Restart the compressor.
15. Check for air leakage.
16. Monitor pressure, temperature, vibration and overall compressor performance.

Service Benefits

Using the 2906017200 HP Element Exchange Kit during the appropriate maintenance operation helps:

• Restore HP compression performance.
• Maintain correct element alignment.
• Reduce compressed-air leakage.
• Support efficient two-stage compression.
• Improve compressor reliability.
• Reduce vibration and abnormal operating conditions.
• Minimize maintenance-related downtime.

Technical Summary

The part-number sequence also confirms 2906017100 = LP element mounting and 2906017200 = HP element mounting, making the two kits complementary for the LP and HP compression stages.

Recommended catalog title: Atlas Copco 2906017200 – ZR/ZT 75–90 HP Element Exchange & Mounting Kit, 2906-0172-00.

Compatibility note: Verify the compressor model and serial number before ordering, since the exact element configuration can vary by machine version.