Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 223

7. Inspect the sealing surfaces of the rotor seal and stator for scratches. If scratches are
visible, replace the rotor seal and/or stator.
8. Insert the replacement rotor seal.
♦ Observe the orientation of the seal: The sealing surface with the engraved flow
passages must be facing out. The pattern is asymmetrical to prevent improper
placement of the rotor seal.
♦ Be careful to avoid contamination on the valve parts. Even minute particles may
cause damage to the valve and result in poor sealing performance.
9. Reinstall the stator and tighten both stator screws alternately, each time with
approximately one-quarter turn, until they are tightened.
Avoid overtightening. The screws hold the assembly together and do not affect the
sealing force, which is automatically set as the screws close the stator against the valve
body.
10. Reinstall the valve as described in section 4.6.1, step 3 and following steps
(→ page 78).
11. Test the valve by pressurizing the system. If leakage is observed, replace the valve
(→ page 213).
12. Update the service information in Chromeleon. Perform the LeftRotorSealChanged
command or RightRotorSealChanged command as appropriate.
Operating Instructions
UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page 215