Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 397)

<6. Maintenance>
6-44
IM 11B08A01-01E
F0234.ai
Seal unit Bracket Seal element
Flange
Screw
(nut)
1 2
3
7
8
4
6
5
Cylinder
9
Figure 6.34 Liquid Sampling Valve (LSV)
(8) Restrictors
There are two types of restrictors: low temp. type for isothermal oven temperature of 145 °C
max. and high temp. type. for over 145°C. Between these two types, the O-ring material for the
restrictor is different.
(1) Stop the operation. (See “3.3.4 Stopping operation” for this procedure).
(2) Stop the supply of power.
CAUTION
The isothermal oven is extremely hot after turning off the power immediately. Keep the purging
air supplied for more than an hour after turning off the power. Keep hands away from the oven
components.
(3) Turn off the supplies of the purging air, carrier gas, hydrogen (or nitrogen) gas for
combustion, combustion air, and sample gas.
(4) Open the control unit door using a key included in the accessory kit. And remove the cover
by removing the two screws of the pressure/fl ow control section.
2nd Edition : May 11, 2012-00