Atlas Copco HP Element Mounting Kit Replacement – 2906040200

The Atlas Copco 2906040200 HP Element Mounting Kit is used for the correct installation and mounting of the high-pressure (HP) compressor element in applicable oil-free screw compressors. The kit provides the required mounting and sealing components needed to secure the HP element, maintain correct alignment, and prevent leakage at the connections.

The HP element receives pre-compressed air from the low-pressure stage and further compresses it to the required pressure. Correct mounting is essential for reliable shaft alignment, sealing and mechanical operation.

Working Process

1. LP Compression – Air is initially compressed in the low-pressure element.
2. Intercooling – The partially compressed air is cooled before entering the HP stage.
3. HP Element – The high-pressure element further compresses the air.
4. Element Mounting – The mounting kit securely positions the HP element in its housing.
5. Sealing – The supplied sealing components prevent compressed-air leakage.
6. Alignment – Correct mounting maintains proper shaft and element alignment.
7. Power Transmission – The drive system rotates the HP element correctly.
8. Final Compression – The HP stage delivers compressed air toward the aftercooler and outlet system.

Main Functions

• Securely mounts the HP compressor element.
• Maintains correct element alignment.
• Helps prevent compressed-air leakage.
• Provides required mounting/service components.
• Supports smooth element rotation.
• Helps reduce vibration and mechanical stress.
• Supports reliable oil-free compressor operation.

Possible Failure Symptoms

Damaged or incorrectly installed mounting components can contribute to:

• Air leakage.
• Excessive vibration.
• Abnormal compressor noise.
• Element misalignment.
• Increased mechanical wear.
• Reduced compression efficiency.
• Higher operating temperature.
• Premature element or bearing failure.

Maintenance / Installation 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 equipment to cool.
5. Remove the required HP-stage connections and covers.
6. Remove the existing HP element and mounting components.
7. Inspect the housing, shaft and mounting surfaces.
8. Clean the mating surfaces.
9. Install the HP element in the correct position.
10. Install the mounting and sealing components supplied with 2906040200.
11. Check shaft alignment and free rotation.
12. Tighten fasteners according to the applicable Atlas Copco torque specifications.
13. Reconnect the air and service connections.
14. Restart the compressor.
15. Check for air leakage, abnormal vibration and noise.
16. Verify discharge pressure and normal operating temperature.

Technical Summary

Recommended catalog title:
Atlas Copco 2906040200 – HP Element Mounting Kit for ZT110–145 Oil-Free Compressors, 2906-0402-00.

Parts catalogs specifically list 2906040200 / 2906-0402-00 as “KIT, ELEMENT MOUNTING HP,” while other parts references identify it for the ZT110–145 HP element exchange application.

Note: Do not confuse this with 2906040100, which is listed as the LP Element Mounting Kit.