Atlas Copco Scavenge Line Kit GA30–55 Replacement – 2901161500

The Atlas Copco 2901161500 Scavenge Line Kit is part of the compressor’s oil-return system. It returns separated oil from the separator vessel back to the compressor air end so the oil can be reused for lubrication, cooling and sealing.

Working Process

1. Oil Injection – Oil is injected into the screw element during compression.
2. Air/Oil Separation – The compressed air/oil mixture enters the separator vessel.
3. Oil Separation – Most of the oil is separated from the compressed air.
4. Residual Oil Collection – Small quantities of oil collect in the separator system.
5. Scavenge Line – The scavenge line provides a controlled path for this separated oil to return to the air end.
6. Non-Return Valve – The valve helps ensure the oil flows in the correct direction and prevents unwanted reverse flow.
7. Oil Reuse – Recovered oil returns to the compressor element.
8. Continuous Cycle – The oil-return process continues while the compressor operates.

Kit Components

The identified components include:

Main Functions

• Returns separated oil to the compressor air end.
• Maintains continuous oil circulation.
• Helps reduce oil carryover.
• Supports compressor lubrication and cooling.
• Prevents reverse oil flow.
• Helps maintain efficient compressor operation.
• Replaces worn or damaged scavenge-line components.

Possible Failure Symptoms

A blocked, damaged or leaking scavenge line can cause:

• Increased oil carryover.
• Excessive oil consumption.
• Oil accumulation in the separator.
• Reduced compressor efficiency.
• Oil leakage.
• Poor lubrication.
• Unstable compressor operation.
• Increased discharge-air oil content.

Maintenance Procedure

1. Shut down the compressor according to the applicable Atlas Copco procedure.
2. Isolate the electrical supply.
3. Fully depressurize the compressor.
4. Allow the oil system to cool.
5. Remove the existing scavenge-line components.
6. Inspect the pipe, non-return valve and fittings.
7. Check the line for blockage or contamination.
8. Clean the connection surfaces.
9. Install the components supplied with 2901161500.
10. Correctly install the O-ring and Dowty sealing washer.
11. Ensure the non-return valve is installed in the correct flow direction.
12. Tighten the connections to the specified torque.
13. Restart the compressor.
14. Check for oil leakage.
15. Verify proper oil return and monitor oil carryover.

Technical Summary

Recommended catalog title:
Atlas Copco 2901161500 – Scavenge Line Kit for GA30–55 Oil-Injected Screw Compressors, 2901-1615-00.

Important: Do not confuse this with 2901161510, which is listed for GA75 compressors.