7 | Cleaning and servicing
BÜCHI Labortechnik AG
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Operation Manual Vacuum Pump V-100
7.1.4
Cleaning the housing
IMPORTANT
Risk of acid damage
The housing of the unit is made of plastic. Escaping acid may damage the material.
u
Immediately remove any drops of acid with a damp cloth.
u
Only use a damp cloth to clean the device.
u
To clean the housing, only use ethanol or soapy water.
7.1.5
Cleaning glass components
The V-100 does not itself contain any glass components but the accessories (Woulff
bottle, secondary cooling cold trap, secondary condenser) consist mainly of glass and
must always be inspected and cleaned before and after use.
As the glass components are under vacuum when in use, they are subjected to high
stress.
u
Before use, check all glass components for cracks, chipping and any other dam-
age.
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Replace any damaged glass components.
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Rinse out glass components with water and a conventional cleaning agent (e.g.
mild soap and water solution).
u
Wherever possible, clean glass components by hand.
NOTE
Feeding a thin copper wire into the cooling coil of the secondary condenser or cold
trap reduces the amount of dirt deposited.
7.1.6
Cleaning tubing
After evacuation, there may still be residual fluid in the tubing from condensed vapors.
The pump can largely dry itself out when running idle.
u
Detach connections to other laboratory equipment and allow the pump to run in
continuous mode.
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Switch off the pump after three to five minutes.
To clean the connecting tubing inside the pump between the two pump heads it is
necessary to open up the pump as follows:
Precondition:
R
Pump has been shut down.
u
Remove the pump top cover and take out the pump tubing (see Chapter 7.2.5
"Replacing tubing", page 40).
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Rinse out the tubing with clean water. If necessary, remove residues inside the
tubing with a copper wire.
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Refit the pump tubing (see Chapter 7.2.5 "Replacing tubing", page 40).
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Switch on the pump and allow it to run in continuous mode until the inside of the
tubing is dried out.
u
Refit the pump top cover.
7.1.7
Cleaning valve heads
Dirt contamination of the valve heads is evidenced by the V-100 failing to achieve the
terminal vacuum of 10 mbar (± 2 mbar) even though components are intact and con-
nections air-tight. To clean them, proceed as follows:
