To Replace A Rotary Valve In The Valve Box - Agilent Technologies 7820A Manual

To Replace a Rotary Valve in the Valve Box

WA RN IN G
WA RN IN G
Maintaining Your GC
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.
Gather the following:
1
• Replacement valve (See
Valves" on page 274.)
• T-10 Torx screwdriver
• 1/4-inch wrench
• Needle-nosed pliers
• Vacuum
2 Load the GC maintenance method
become ready.
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.
Set all valves to Off.
3
Leave on the GC and valve actuator air.
4
Turn off the carrier gas and sample line flows and relieve any
5
back pressure to the valve.
Maintaining a Valve
"Consumables and Parts for
and wait for the GC to
15
279