Maintaining a Valve 19
Maintaining Your GC 341
To Replace a Rotary Valve in the Valve Box
1 Gather the following:
• Replacement valve (See “Consumables and Parts for
Valves” on page 336.)
• T- 10 Torx screwdriver
• 1/4- inch wrench
• Needle- nosed pliers
• Vacuum
2 Load the GC maintenance method and wait for the GC to
become ready.
3 Set all valves to Off.
4 Leave on the GC and valve actuator air.
5 Turn off the carrier gas and sample line flows and relieve
any back pressure to the valve.
Do not install a liquid sampling valve (LSV) in the valve box if you
plan to heat the box above 75 °C. Heating an LSV over 75 °C can
cause a leak and subsequent explosion. LSVs should be mounted
in the side location to avoid potential explosions.
The oven, inlet, detector, and valve box may be very hot.
Sample and/or harmful gases may be present. Refer to your
company’s standard operating procedures for purging the
chemicals from the sample line.
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