Atlas Copco Breather Kit ZT15–22 Replacement – 2901111500

The Atlas Copco 2901111500 is a breather service kit used on ZT15–22 oil-free compressors. The breather assembly allows the relevant internal housing to exchange air while filtering contaminants and preventing unwanted dirt from entering the system.

The kit contains two filter elements and three O-rings, along with a service diagram. Atlas Copco lists the kit weight at approximately 90.718 g.

Working Process

1. Pressure Equalization – The breather allows controlled air movement between the internal housing and atmosphere.
2. Filtration – The filter elements prevent dust and other contaminants from entering the housing.
3. Clean Air Flow – Filtered air can pass through the breather during pressure changes.
4. Sealing – O-rings maintain an airtight connection between the breather assembly and housing.
5. Continuous Operation – The breather protects the internal components during normal compressor operation.
6. Maintenance – When the filter elements or seals become contaminated or worn, they are replaced using 2901111500.

Kit Components

Atlas Copco’s official parts information lists:

Main Functions

• Maintains proper breather operation.
• Filters incoming/outgoing breather air.
• Prevents contamination from entering the housing.
• Maintains proper pressure equalization.
• Provides reliable sealing through replacement O-rings.
• Supports long-term reliability of the ZT15–22 compressor.

Typical Failure Symptoms

A clogged or damaged breather can cause:

• Restricted breather airflow.
• Abnormal internal pressure.
• Oil contamination around the breather area.
• Dirt entering the internal housing.
• Leakage around the breather connection.
• Increased maintenance requirements.

Maintenance Procedure

1. Shut down the compressor according to the applicable Atlas Copco service procedure.
2. Isolate the electrical supply.
3. Ensure the compressor is safely depressurized.
4. Allow the equipment to cool.
5. Locate and remove the existing breather assembly.
6. Remove the old filter elements and O-rings.
7. Clean the mating surfaces.
8. Install the new filter elements supplied in 2901111500.
9. Replace the O-rings.
10. Correctly assemble the breather.
11. Reinstall it on the compressor.
12. Check that the breather connection is properly sealed.
13. Restart the compressor.
14. Check for leakage and abnormal pressure behavior.
15. Verify normal compressor operation.

Technical Summary

Recommended catalog title:
Atlas Copco 2901111500 – Breather Kit ZT15–22 for Oil-Free Compressors, 2901-1115-00.

Atlas Copco’s official parts documentation also confirms the individual components: filter elements 1624 1633 05 and 1624 1633 09, O-ring 0663 2107 84, two O-rings 0663 2107 81, and service instruction 9820 4791 00.