Membrane controlled anti-siphon device
Part no. 15 513 52
7 / 12
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Installation in a dome
Install the product horizontally so that the top with the ventilation opening for the membrane
faces downward. This allows any condensation that forms to run out.
Recommendation: Install a filter.
NOTE
Installation behind pump units with an operating tank.
The actual height difference
∆
X
is the difference between the installation position of
the HS-V.2 behind the pump unit and the lowest point in the suction line.
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Adjusting the anti-siphon device - HA according to the actual height difference
X
For the height setting
HA
of the HS-V.2, the actual height difference
X
is decisive. If the
height
X
is greater than
HA
, the pressure of the fuel column behind the anti-siphon device is
higher. The opening pressure
p
o,o
must therefore be higher than the pressure of the fuel
column for the HS-V.2 to function properly.
NOTE
Operating safety:
Adjust
HA
so that the actual height difference
X
is just
safeguarded.
Higher
HA
values lead to greater opening pressures
p
o,o
and, consequently, to higher
vacuums in the suction line and increased formation of gas bubbles.
1. Measure the height difference
X
between the installation position of the anti-siphon
device and the lowest point of the suction line – generally, the hose on the floor in front of
the point of consumption.
The setting for the safety level according to Points 3 and 4 applies for fuels with a
maximum density of
≤
860 kg/m³, e.g., fuel oil EL.
2. Set the correct safety level from the measured height difference
X
:
Type
Height
setting
HA
in m
p
o,o
in mbar
Pressure loss
p
v at V in mbar
40 l/h
220 l/h
HS-V.2 0.5
-75
-
-
1.0 -115
<
5
40
2.0 -200
<
10
47
3.0 -284
<
10
52
4.0 -366
<
10
60
3. Set measured height difference
X
≤
HA
on the scale using the handwheel (see
OPERATION
).
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