Replacing the AVS 6/7 Rotor

This Information Applies To: Agilent 5000 Series ICP-OES Systems, AVS 6/7

Issue: 

Over time the AVS 6/7 rotor can become worn or damaged by chemicals. Agilent recommends inspecting and/or replacing the rotor every 5000 AVS switches or when analytical results or precision fall outside expected limits.

Steps to Follow:

Tip: See the Agilent ICP Expert Help and Learning Center for further detailed instructions.

Warning: Always wear appropriate PPE when handling AVS 6/7 components and tubing to avoid contact with potentially dangerous chemicals.

1. It is not necessary to disconnect the tubing from the AVS valve to replace the rotor however, the tubing can be removed and rinsed when there is suspected system contamination. Figure 1 shows the AVS with the tubing removed. 

   
   Figure 1. 1 AVS7 with the tubing removed

2. Disassemble the AVS 6/7. Use the 7/16 inch hex key provided with the valve to remove the AVS body. 

3. Inspect the contact surface of the rotor for signs of wear and replace if there are visible score marks or damage. AVS 6/7 rotor part number: G8494-60002, AVS 6 stator and rotor part number: G8494-60003. AVS 7 stator and rotor part number: G8495-60003

    

4. Inspect the reverse face of the stator for signs of wear and replace if there are visible score marks or damage.

    

5. Re-assemble the AVS7 valve.

   Tip: When reassembling the AVS, it is critical that each screw is tightened evenly in turn to ensure consistent pressure. If the pressure on the three screws is not even or the screws are too tight / too loose, air leaks may occur.

6. When finished reassembling the AVS, it is recommended to run the Advanced Valve System Test, Advanced Valve System Test (video) to check performance of the AVS. 

Learn how to effectively maintain your AVS: AVS 6/7 Supplies for ICP-OES