15 Maintaining a Valve
To Replace a Gas Sampling Valve Loop
Maintaining Your GC 231
10 Install the new sample loop.
11 Repressurize the sample loop and check for leaks.
12 Install the upper valve box. See “To Install the Upper Valve Box” on page 237.
13 Exit maintenance mode: Select Maintenance > Instrument > Perform Maintenance >
Maintenance Mode > Finished.
14 Restore the analytical method.