Cirrus SP101013.111 – 10 October 2012
MKS Instruments UK Ltd., Spectra Products
31
high pressure end you can pull it out of the assembly.
6. Take the cassette of fused silica tubing and carefully feed one end down the capillary assembly
from the high pressure end. The fused silica tubing is quite fragile but should slide freely down the
inner bore of the capillary assembly. Continue to feed the tube down the capillary until it emerges
inside the oven.
7. Thread the Swagelok nut and then the ferrule onto the silica tubing as shown in the picture above.
8. Thread the fused silica tube into the Swagelok reducer and continue until you feel it butt up against
the vacuum chamber inlet, then withdraw the fused silica tube by 5mm.
Slide the ferrule into place then tighten the nut
FINGER TIGHT
. With a 5/16 inch spanner tighten the
nut a further
1/4 TURN
only.
9. At the high pressure end of the capillary, carefully cut the fused silica tube flush with the end of the
1/4 inch stainless steel tube. Ensure the cut is clean and the tubing has not been crushed.
10. You will now need to leak check the inlet, see Leak Checking before refitting the oven lid.
