Emerson Rosemount 700XA Reference Manual page 116

Operation and maintenance
June 2022
5. Install air solenoid items.
6. Perform a standard system leak test.
7. Restart the sample flow.
You can now return the GC to service.
Remove the MAT liquid sample injection valve
Inside the upper compartment of the gas chromatograph (GC), there are two insulation
covers, which open like clam shells that slide off of the end of the LSIV, to be removed.
Procedure
1. Disconnect the carrier and sample tubing from the LSIV.
2. Remove the heater and resistance temperature device (RTD) from the heater block.
3. Disconnect sample and air tubing from the outer portions of the LSIV.
4. Unscrew the retaining ring, using a pin spanner wrench or other tool.
Replace liquid sample injection valve (LSIV) seals
Due to the possible damage caused by the presence of solids in the sample stream,
combined with the regular, repeated motion of the injection valve stem, LSIV seals may
require annual replacement.
Note
Specific application conditions should dictate the frequency of the seals replacement;
monitor analytical performance to determine appropriate replacement intervals.
Note
ID numbers listed in parentheses refer to
116
d) Air Actuator Retract
Refer to Drawing #DE-20990.
With the retaining ring loose, the LSIV assembly is free to be pulled out of the upper
enclosure.
Figure 5-9: Rosemount 700XA after LSIV has been removed
A. Union coupling
B. Actuation section
C. Liquid sample connector
D. Thermal barrier adapter
Figure 5-10.
Reference Manual
2-3-9000-744
Emerson.com/Rosemount