Buchi Rotavapo R-220 SE User Manual download pdf (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!

“OFF” stage

“Medium throughput” stage

“Maximum throughput” stage

Installation

In this position, the shut-off tap completely blocks the ﬂow of the medium.

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.

Starting with the tap in “Medium throughput” stage – turn the upper, black part clockwise to

reach the “Maximum throughput” stage.

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Buchi Rotavapo R-220 SE User Manual Page 65