Figure 8-1: No person standing here during filling.
To fill the tank, proceed as follows:
Refer to the safety notes in section 8.4, on page
22.
The tank must never be left unattended during
the filling stage.
The pressure of the supply tank or the
filling line must not exceed 3 bars.
Pressure as read on the gauge does not
need to be monitored.
1. Before starting, blow dry air or nitrogen through the
lines and the valves to remove any moisture.
2. Open the vent valve (2). Close the
filling/withdrawal valve (1). Close the pressure-
building valve (3).
This enables you to check that the tank is
no longer pressurized. If the tank were still
pressurized (a jet of gas would appear),
there would be a danger of cryogenic
burns.
3. Fit the filling valve's connector (5) onto the supply
line by means of a transfer hose (
130 TC
or
130/130
) (4).
To limit filling time, it important to use the
shortest possible transfer line (1.1 or
1.5 m).
4. Open the TP filling valve (1). Check that the
pressure-building valve (3) is closed. Check that
the vent valve (2) is open.
5. Open the line or supply tank's valve slightly (to
allow a low flow).
If the tank is not cold (new tank, or tank has
not been used recently) you must open the
withdrawal valve of the supplying tank very
gently so as not to send too much liquid
nitrogen into the tank. This precaution will
prevent excessive pressure in the tank
being filled.
6. Now open the line (or supply tank) valve gradually
to speed up the filling operation.
Opening the withdrawal valve of the supplying tank
gradually prevents the pressure in the vessel being filled
from rising too suddenly.
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