BÜCHI Labortechnik AG
Cleaning and servicing | 7
Operation Manual Pure Chromatography Instrument C-805
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Pumping detergent through the check valves
Materials needed:
Liquid Laboratory Detergent
Isopropanol/Water (50/50) or Methanol/Water (50/50)
Navigation path
➔
Tools
➔
Manual Control
➔
Column Flushing...
Precondition:
R
A bypass is installed. See Installing and removing a column
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Navigate to the
Column Flushing
dialog according to the navigation path.
Sonicate the check valve
Materials needed:
Open-end wrench, ½”, 9/16" x 5/16"
Torque wrench
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Switch the On/Off master switch to Off.
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Disconnect the mobile phase tubing from the inlet (bottom) of the pump head us-
ing the 9/16” open-end wrench.
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Disconnect the mobile phase outlet tubing from the top of the pump head using
the 5/16” open end wrench.
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Remove both check valve housings from the pump head using the ½” open-end
wrench.
ð
The check valve capsule is accessible.
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Sonicating the check valve for 10 min in the appropriate solvent.
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Install the check valve.
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Install the check valve housings back into the pump head.
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Tighten the check valve housing to 75 inch pounds with the ½” torque wrench.
7.5
Cleaning the instrument
Navigation path
➔
Tools
➔
Manual Control
➔
Column Flushing...
Precondition:
R
