Figure 16 Drain lines
1
Bottle enclosure drains (9.53 mm
(0.375-in.) ID hose)
4
Air break
2
Chemical drain (12.7 mm (0.5-in.)
ID hose)
5
Case drain (25.4 mm (1-in.) ID
hose)
3
Fume trap
Figure 17 Sample lines
1
To drain or process stream
4
Sample bypass drain (0.25-in. OD x
0.040-in. ID poly tubing)
2
Vent
5
Sample in (0.25-in. OD x 0.040-in.
ID poly tubing)
3
Drain tee
6
Shut-off valve
Sample line guidelines
Select a good, representative sampling point for the best instrument
performance. The sample must be representative of the entire system.
To prevent erratic readings:
• Collect samples from locations that are sufficiently distant from points
of chemical additions to the process stream.
• Make sure that the samples are sufficiently mixed.
• Make sure that all chemical reactions are complete.
English
19
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