Emerson Rosemount 700XA Reference Manual page 121

July 2020
Figure 82: LSIV Exploded View
Procedure
1. Halt sample flow and allow time for the LSIV to cool.
2. Remove the actuation portion (26) of the valve by unscrewing the union coupling (19) from the heater section (11), which
should remain attached to the gas chromatograph (GC).
Emerson has provided a union coupling wrench for this purpose.
This will expose the sample flow chamber and the old seals that ride the metering rod (25), which should be treated with
great care to prevent bending or scratching.
3. Pull the sample flow chamber assembly (13) off the metering rod. Remove the two seals (14).
To do this, you may need to push from the opposite sidw with a rod smaller than ⅛ in. (9.5 mm).
4. Place new seals on the sample flow chamber assembly. Press the chamber and seals back over the metering rod.
5. Place the actuation section in position on the heater section's headpiece.
6. Use the union coupling spacer to ensure that the union coupling is properly aligned with the heater section's headpiece.
7. Use the union coupling wrench to retighten the union coupling over the heater section.
8. Restart the sample flow.
Rosemount 700XA 121