
Chapter 6: Shutdown and Maintenance 205
Changing the Primary Sample Line
To r epla ce the primary sample line, you will need a 12-inch length of replacement
tubing from the accessory kit. There is a different fitting at each end of the
tubing, so the procedure is divided into two sections.
Assembling the Collet Fitting at the Pinch Valve
At the pinch valve end of the primary sample line, a collet fitting joins the sample
line to the pinch tubing. Perform the following steps to replace the tubing.
1 Turn the stream off (if needed). Make sure the loading port is in the unload
position.
2 Unscrew the nut from the collet fitting and pull the nut and collet apart.
3 Pull the pinch tubing out of the nut, and then pull the sample line out of the
pinch tubing. See Figure 6-10.
4 Locate a new 12-inch piece of sample line tubing.
a Slide the nut over the new sample line tubing.
Figure 6-10 Collet nut fitting on pinch valve tubing
b Slide the pinch valve tubing over one end of the sample line tubing until
approximately 6 mm of the sample line is inside the pinch valve tubing.
collet
nut
sample line
tubing
6 mm
pinch valve
tubing
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