Emerson Rosemount 700XA Reference Manual page 111

Reference Manual
2-3-9000-744
Figure 5-5: XA series valves
Overhaul a valve
Note
Rosemount valves have a lifetime warranty. Replacement factory-built XA Series valves are
available. Call your local Emerson Customer Care representative for more information.
If you are overhauling a six-port valve, refer to drawing #CE-22260; If you are overhauling a
ten-port valve, refer to drawing #CE-22300.
Procedure
1. Shut off the carrier and sample gas streams entering the unit.
2. Remove the top hat heater from the oven system.
3. If the faulty valve is not easily accessible, loosen the thumb screw and tilt the oven
4. Disconnect tubing and fittings that attach to the valve from other locations.
5. Use an Allen wrench to remove the two baseplate bolts on the valve to be replaced
Rosemount 700XA
WARNING
Burns
Some parts of the analyzer may be heated to 248 °F (120 °C).
To prevent burns, do not touch any of the hot parts. All parts of an analyzer are
always hot unless it has been switched off and allowed to cool down.
Before fitting, removing, or performing any maintenance on the analyzer, make
sure that it has been switched off and allowed to cool for at least two hours.
When handling the analyzer, always use suitable protective gloves.
These precautions are particularly important when working at heights.
If burned, seek medical treatment immediately.
on its side.
or serviced. The valve can now be removed from the GC.
Operation and maintenance
June 2022
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