10
Special requirements - differential measurements
For differential measurements, one flow meter is installed in the supply line pipe and one in
the return line pipe. The flow difference between these meters determines the consumption.
If ordered with the "differential measurement" option, VZFA II flow meters are calibrated in
accordance with the indicated supply and return flow volumes. The flow meters are labeled
“SUPPLY” (0) and “RETURN” (1)
. Make sure that these flow meters are installed in the correct
pipeline, i.e. the supply flow meter shall be installed in the supply line pipe and the return flow
meter shall be installed in the return line pipe.
Special requirements - ships
On ships, attention is required to ensure that the engine can continue to operate at full power
even if there is heavy filter contamination or if the flow meter is damaged. A pressure switch can
be used to switch over to the bypass and to draw attention for servicing. The engine then
continues to operate but without consumption measurements.
NOTICE
Ship classification societies require the installation of bypass pipes.
The relevant regulations must be followed.
Summary of Contents for CONTOIL VZF II
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