Atlas Copco Float Valve / Moisture Trap Service Kit Replacement – 2910020600

The 2910020600 Float Valve Kit is used to service the moisture trap and condensate drainage system of applicable Atlas Copco ZR/ZT oil-free compressors. The float-valve mechanism automatically controls the removal of accumulated condensate while preventing unnecessary loss of compressed air.

As moisture collects in the trap, the liquid level rises and activates the float mechanism. Once the required level is reached, the valve opens and allows condensate to discharge. After the condensate level falls, the valve closes again.

Working Process

1. Moisture Formation – Cooling of compressed air causes water/condensate to collect in the moisture-trap system.
2. Condensate Collection – Water accumulates inside the moisture trap.
3. Float Movement – The float rises as the condensate level increases.
4. Valve Activation – At the operating level, the float mechanism opens the drainage valve.
5. Condensate Discharge – Accumulated water is discharged from the trap.
6. Float Drops – As the condensate level falls, the float moves downward.
7. Valve Closure – The valve closes to prevent continuous air loss.
8. Automatic Cycle – The process repeats automatically during compressor operation.

Kit Components

Atlas Copco’s official listing specifies these components:

Main Functions

• Automatically removes accumulated condensate.
• Maintains proper moisture-trap operation.
• Helps prevent water accumulation.
• Reduces the risk of moisture entering downstream systems.
• Helps prevent unnecessary compressed-air loss.
• Restores sealing performance during maintenance.
• Supports reliable condensate drainage.

Possible Failure Symptoms

A worn or faulty float valve can cause:

• Condensate accumulation.
• Drainage failure.
• Continuous air leakage.
• Moisture carryover.
• Water entering downstream equipment.
• Unstable drainage operation.
• 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 relevant system.
4. Allow the equipment to cool.
5. Isolate the condensate/drainage system.
6. Open the moisture-trap service section.
7. Remove the old membrane, gaskets and sealing washers.
8. Clean the valve and sealing surfaces.
9. Inspect the float-valve mechanism for wear or contamination.
10. Install the replacement components from 2910020600.
11. Ensure all gaskets and seal washers are correctly positioned.
12. Reassemble the float valve.
13. Restore the condensate and air connections.
14. Restart the compressor.
15. Check that condensate drains correctly.
16. Confirm that the valve closes properly without continuous air leakage.

Technical Summary

Recommended catalog title:
Atlas Copco 2910020600 – Float Valve / Moisture Trap Service Kit for ZR/ZT Oil-Free Compressors, 2910-0206-00.

Atlas Copco’s official catalog confirms 2910020600 as the Moisture Trap Service Kit for ZR/ZT Oil-Free Compressors and lists the six component types included in the kit.

Note: Parts catalogs also identify 2910020600 as “KIT, VALVE FLOAT”, confirming that this is specifically a float-valve service kit rather than a general compressor service kit.