Velp Scientifica
– UDK139 Operating Manual
10004762/B5
13
3.1.
Hydraulic connections
Connect the tubes supplied
to the tube holders located on the rear panel following
the instructions below:
INLET
Cooling Water
Cooling water inlet (tap water).
Connect the unit to the tap water supply using the red and
white tube with
¾” GAS threaded connections.
Open the tap water in order to obtain a tap water flow rate
sufficient to cool the distillate (see chapter 5.3). Tap water is
used during the distilling phase only for a considerable
reduction in consumption
.
INLET
H
2
O
Distilled water inlet (or deionized, ammonia free) for supplying
the steam generator and diluting the sample.
Connect the black tube and the relative reserve connector
using the rapid connection and push the other end of the tube
with level sensor right to the bottom of the carboy.
INLET
NaOH
Sodium hydroxide inlet (32-35%w/v for Kjeldahl analysis)
Connect the white tube and the relative reserve connector
using the rapid connection. The rapid connection is different
from the other two (H2O and H3BO3) in order to avoid errors
and possible damage to tubes and internal components.
Push the end of the tube with level sensor to the bottom of the
corresponding carboy.
OUTLET
Cooling Water
Cooling water outlet.
Push the PVC tube supplied (diameter 10x14 mm) onto the
corresponding tube holder by hand and place the other end of
the tube in a sink/drain
Check the flow rate of the cooling water discharged from the
condenser during the distillation/titration - the minimum flow
rate using tap water at a temperature of about 15°C should be
0.5 l/min. (see chapter 5.3).
OUTLET
Distillation
Residues
Distillation residues outlet
Distillation residues are discharged from the test tube at the
end of distillation (if selected in the work program).
Connect the black tube and the relative full connector. Place
the end of the tube with level sensor in the collecting carboy
and regulate the height of the sensor according to the type of
vessel used.
Caution:
high temperature solution.
OUTLET
Steam
Discharge
Steam discharge outlet.
Discharge of hot water from the steam generator.
At the end of each distillation the steam generator discharges
the excess hot water to the distilled water tank for re-use.
Push the silicone tube supplied (diameter 6x9 mm) onto the
corresponding tube holder by hand and place the other end of
the tube in the distilled water tank.
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