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XA valvesFigure 4-4:
Valve overhaul
Note
Replacement factory-built XA valves are available. Call your Emerson Process Management
representative for more information.
Use the following procedure to overhaul a valve:
1. If you are overhauling a 6-port valve, refer to drawing #CE-22015; If you are
overhauling a 10-port valve, refer to drawing #CE-22016. Both drawings are
available in Appendix F.
2. Shut off the carrier and sample gas streams entering the unit.
3. Remove the top hat heater from the oven system.
4. If the faulty valve is not easily accessible, loosen the thumb screw and tilt the oven
on its side.
5. Disconnect tubing and fittings that attach to the valve from other locations.
6. Use an allen wrench to remove the two baseplate bolts on the valve to be replaced
or serviced. The valve can now be removed from the GC.
7. Loosen the valve’s torque bolt.
Operation and maintenance
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Operation and maintenance
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