Chromatograph Series
User Manual
MRC Instrument
9
valve knob to “On” position. The duct connection of outdoor air should be stainless steel or copper pipes.
3.4 External Gas Flow Connection
3.4.1 Connect the pipeline to the connector
INE-112N-GC
gas chromatograph gas pipeline mainly consists of 3×0.5 polyethylene
duct
(Annex 28 #) or 2×0.5
stainless steel duct
. Nuts are M8×1, 3.2 (Attachment 24 #) or M8×1,
2.1 (Attachment 7 #). The connection diagram of
these two kinds of conduits and joints is shown in Figure 3.4.1. In the picture, the purpose of the φ3×0.5 polyethylene
pipe with sealing gasket is to enhance the strength of the pipe at the sealing point to ensure smooth gas and sealing
performance. If φ2×0.5 stainless steel connecting pipes are used, φ2×0.5×20 sealing gaskets are not needed. The
sealing ring in the picture can also be replaced by a φ5×1 PTFE tube cut into a length of 5mm. Two sealing rings m
ust
be used in use, otherwise the sealing performance will not be guaranteed. The maximum seal pressure is
0.5MPa~0.8MPa (5kgf/cm2~8 kgf/cm2). Check whether the gas circuit joints are leaking. Do not use ordinary soapy
water with strong alkalinity to avoid corrosion of the parts. It is better to use a dilute solution of sodium lauryl sulfate
as the leak test liquid.
