Galvanic Applied Sciences ProTech903, Operation Manual

Page: 157 / 190

Revision 14
157 August 02, 2019
e) Pull the ultra-torr elbows away from the reaction tube. Slide the old tube out of the
furnace assembly. Slide the nuts, ferrules and O-rings off the old tube.
f) Carefully slide the new tube into the furnace. Slide the old nuts and ferrules onto the two
ends of the tube, as well as two new Kal-rez high temperature rubber o-rings. The correct
order is shown in the exploded view in Figure 7-6.
Figure7-6: Exploded View of Ultra-torr Fitting
Slide the nut (4) with the threads facing toward the end of the tube, the ferrule (3) with the
narrower end facing toward the end of the tube, and the Kal-rez high temperature o-ring
(3) over the end of the quartz reaction tube (5). Slide the end of the tube into the end of
the elbow (1) until it cannot be pushed in any further. Carefully tighten the nut onto the
elbow. DO NOT OVERTIGHTEN! This may cause the tube to break. Tug on the elbow
slightly after tightening to ensure that the elbow is snugly attached to the end of the tube.
g) Repeat step 5 for the other end of the tube.
h) Replace the end caps on the furnace enclosure. Be sure to align the threads correctly.
The end-caps will screw on very easily if the threads are aligned correctly. DO NOT
FORCE! Cross threading will seriously impair the explosion proof nature of the enclosure.
i) Once the quartz reaction tube has been replaced, it is necessary to leak check the
furnace prior to powering it back on. Turn the sample and hydrogen flow back on. Ensure
hydrogen is flowing at 1.5 and sample is flowing at 0.5 on the rotameters.
j) Place a cap on the top side of the flame arrestor on the right hand side of the total sulfur
furnace, as shown in Figure 7-7. This will block flow through the total sulfur furnace.