22
Rotavapor
R-220 EX
4 Putting into Operation
4.13 Operating the Shut-off tap
The shut-off tap is of a special design. It does not have a
con ti nuous thread on its inside for tightening it, but rather a
sli ding plane with two fixed latching positions. The closing
pres sure when it is in a closed position is provided by a
prestressed spring.
• Insert the shut-off tap on the distribution head and turn
the white lower section of the grip
clockwise until the
shut-off tap is tightly seated.
• To open: Turn the gray upper section of the grip
clo-
ckwise until the shut-off tap latches into the 1
st
position.
If the opening is not large enough, continue turning until
the shut-off tap reaches the 2
nd
position.
4.14 Bath replenishment (optional)
Bath replenishment inlet
Hose nipple, Ø 9 mm
Bath replenishment outlet
Hose nipple, Ø 12.5 mm
Bath discharge valve
Hose nipple, Ø 12.5 mm
Opening the needle valve
slightly by one-quarter turn
pro duces a continuous supply flow.
If oil is used as heating medium, the bath replenishment has
to be emptied and disconnected from the water inlet.
Otherwise, there is a risk of water pouring into the hot oil bath.
Fig. 4.19: Shut-off tap
Fig. 4.20: Bath replenishment
