BUCHI Rotavapo R-220 SE - Manual (Page 65)

5 Putting into operation
65 R-220 SE Operation Manual, Version F
After readjustment, perform a vacuum test-run without heating bath and sample medium.
NOTE
Perform the adjustment in single-turn steps only. Inbetween, check for proper tension with the empty
evaporating flask.
5 .19 Installation and usage of a shut-off tap
The shut-off tap provides a three stage valve mechanism with a spring-loaded seal stamp. This
prestressing assures safe seal under normal conditions.
Turn the lower, white part clockwise to install the tap at the glassware thread. Mount it handtight only!
a
b
c
“OFF” stage “Medium throughput” stage “Maximum throughput” stage
Installation
a In this position, the shut-off tap completely blocks the flow of the medium.
b Starting with the tap in “OFF” stage – turn the upper, black part clockwise to reach the
“Medium throughput” stage. A noticeable drop in resistance can be felt between every stage.
c Starting with the tap in “Medium throughput” stage – turn the upper, black part clockwise to
reach the “Maximum throughput” stage.