Atlas Copco Pipe Seal Kit for Oil & Water System Replacement – 2906008900

The Atlas Copco 2906008900 is a pipe sealing service kit used for maintaining leak-tight connections in the compressor’s oil and water systems. It replaces sealing components that can deteriorate due to temperature, pressure, vibration and long operating hours.

The kit helps maintain proper separation and containment of the oil and water circuits and prevents leakage from serviced pipe connections.

Working Process

1. Oil and Water Circulation – The compressor’s oil and cooling-water circuits circulate fluids through their respective piping.
2. Pipe Connections – Various pipe joints connect coolers, housings, valves and other components.
3. Sealing – Sealing elements prevent oil or water from escaping at these joints.
4. Pressure Containment – Proper seals maintain the required circuit pressure.
5. Temperature Resistance – The seals operate under elevated temperatures during compressor operation.
6. Wear & Aging – Continuous operation can cause seals to harden, deform or lose sealing capability.
7. Service Replacement – During maintenance, worn sealing components are replaced using 2906008900.
8. Leak Testing – After reassembly, the oil and water circuits are pressurized and inspected for leakage.

Main Functions

• Seals oil-system pipe connections.
• Seals water-system pipe connections.
• Prevents oil leakage.
• Prevents cooling-water leakage.
• Maintains proper circuit pressure.
• Supports reliable compressor cooling and lubrication.
• Restores leak-free performance during maintenance.

Typical Failure Symptoms

Worn pipe seals can result in:

• Oil leakage around pipe joints.
• Cooling-water leakage.
• Visible contamination around connections.
• Pressure loss.
• Reduced cooling performance.
• Increased maintenance requirements.

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 equipment to cool.
5. Isolate and drain the relevant oil/water circuits.
6. Access the pipe connections requiring service.
7. Remove the old sealing components.
8. Inspect the pipe ends and sealing surfaces.
9. Clean the mating surfaces.
10. Install the replacement seals from 2906008900.
11. Ensure the seals are correctly seated and not damaged.
12. Reassemble the pipe connections.
13. Tighten connections according to the applicable service specifications.
14. Restore the oil and water circuits.
15. Gradually pressurize the system.
16. Check carefully for oil and water leakage.
17. Restart the compressor.
18. Monitor temperature, pressure and leakage during operation.

Technical Summary

Recommended catalog title:
Atlas Copco 2906008900 – Pipe Seal Kit for Oil & Water System, 2906-0089-00.

The part is consistently identified as “KIT, PIPE SEAL FOR OIL AND WATER SYSTEM” in Atlas Copco parts catalogs.

Important: Do not confuse 2906008900 with 2906008800, which is the pipe seal kit for the drain system.