VICI D-2-IM - Manual (Page 17)

13
CAUTION: Never use leak detecting fluids on any part of
this system.
Installing and Purging the Helium Purifier
1. If the pressure regulator has a 1/8" male cone-type outlet port, install the Valco
1/8" external to 1/16" internal reducer (EZR21); if it has a 1/4" male cone-type
outlet port, install the Valco 1/4" external to 1/16" internal reducer (EZR41). For
other regulator outlet fittings, a wide variety of Valco adapters are available.
2. Remove the cap from the inlet tube of the Valco helium purifier and insert the
tube fitting into the 1/16" reducer port. (Keep the outlet tube capped.) Use a
1/4" wrench to turn the nut one-quarter turn past the point where the ferrule
first starts to grab the tubing. Do not remove the fitting. When made up
properly, it should be leak-tight.
3. Turn the output pressure regulating knob clockwise until the gauge registers
345 KPA (50 psi).
4. Allow five minutes for equilibration, then turn the regulating knob all the way
counterclockwise.
5. Observe the needle of the output pressure gauge for 15 minutes. There will be
a slight initial drop, but if it doesn’t move after that, consider that all the connec-
tions are tight.
6. If necessary, use an electronic leak detector to locate any leaks. If a leak
detector is not available, tighten all the fittings (including the output pressure
guage), and repressurize the system for another test.
CAUTION: Never use leak detecting fluids on any part of
this system.
7. Upcap the outlet tube of the purifier and purge the system for 15 to 30 minutes
at 60 - 80 mL/min to eliminate air from the purifier getter material.
EZR21
Installation