8
BÜCHI
Vac
V-511/512/513
3 Function
3
Function
3.1
General
The system V-511 consists of a PTFE diaphragm pump and
an integrated additional condenser, without the Vacuum Con-
troller V-800. This system runs in continuous operation with
the main switch turned on.
The systems V-512 and V-513, with the integrated Vacuum
Controller V-800, create and regulate a vacuum and maintain
it at a constant level by automatically compensating for any
loss of vacuum in the evacuated device and returning it to the
selected set pressure. This is accomplished by turning the in-
tegrated PTFE diaphragm pump on and off directly.
The vacuum, which is selected according to the solvent (cf.
Page 27), permits almost 100% condensation in the condenser
of the distillation apparatus. The result is a massive reduction
in solvent emissions. The integrated additional condenser as-
sures that any solvent vapors which might have been suction-
ed off will be condensed out to the physical limit following the
pump.
In addition, the cooling water can be controlled during distilla-
tion. This can be handled by the cooling water valve, which is
available as an option. Up to 95% of the water can be saved
with this device.
Additional functions are
•
Automatic performance of distillations until dry, if this is physi-
cally possible without a loss of solvents (
씮
redistillation!)
•
Automatic continued distillation until completion of a distil-
lation which has been started manually (e.g., with a mixture
of problematic solvent mixtures)
Büchi Vac V-511
햲
Additional condenser
햳
Collecting tank
햴
Main switch
Fig. 4: Vac V-511
햲
햳
햴
