Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 127)

<2. Installation, Piping, and Wiring>
2-10
IM 11B08A01-01E
2.2.2 Connecting Piping
For connection, refer to “1.2 External Dimensions.”
For the user-specifi c connection, refer to “Operation Data.”
(a) Sample inlet pipes
These are pipes to lead samples from process lines or an external sampling system into analyzer
STREAMS #1 to #12 or the sample inlet of the pressure control section.
The analyzer can analyze up to 31 sample streams. For more than 31 sample streams, an
external sampling system is employed, which has a stream switching function. In this case, one
sample inlet pipe is used to lead multiple samples into the analyzer. When providing more than
one pipe, see the “Operation Data” so that the specifi ed sample can fl ow into the analyzer from
the designated inlet port. STREAM and No. are marked at the piping port.
Use stainless steel of O.D. 6 mm or 1/4 inch with any oil cleaned off.
(b) Standard sample inlet pipes
These are pipes between the outlets of pressure regulators for standard gas cylinders and
STANDARD #1 to #3 ports of the analyzer.
When different standard gases are used, provide separate pipes for each gas to lead them into
the analyzer.
Use stainless steel of O.D. 6 mm or 1/4 inch with any oil cleaned off.
(c) Carrier gas inlet pipes
These are pipes to introduce the carrier gas to the analyzer between the outlets of carrier gas
cylinder pressure regulators and CARRIER IN ports of the analyzer.
When two different carrier gases are used, provide separate pipes for each gas to lead them into
the analyzer.
The following is recommended. By arranging the two gas cylinders in this way, there is no
contamination of air.
To GC8000
(Spare)
Figure 2.10
Confi rm that the insides of the pipes and pipe fi ttings are not contaminated.
Confi rm that the piping connections are done with no leakage.
2nd Edition : May 11, 2012-00