Chromatograph Series
User Manual
MRC Instrument
1
3.4.2 External Gas Flow Connection
Cut the polyethylene pipe of
φ
3
×
0.5 (accessory 28#) into six pieces according to requirements. Then, referring to
Figure 3.4.1, use them to link the pressure-reducing valve joint and the purifier inlet (joint on the switch valve), and to
link the purifier outlet (joint on the drying pipe) and the gas flow inlet of the main device. Now, the connection of the
external gas flow is finished.
3.4.3 Inspection of External Gas Flow Leakage
After the connection of the external gas flow is completed, it is necessary to examine for leakage with following steps:
‧
Shut down the constant flow valve for the carrier gas and the needle valves for hydrogen and air on the packed column
gas flow of the main instrument.
‧
Turn on the high pressure valve of the steel cylinder (before doing so, the low adjustment lever must be in a relaxed
state), slowly turn the low pressure adjustment lever until the low pressure gauge indicates 3kg/cm2.
