CONTOIL
®
17
Special requirements - pulsers for remote evaluation
Return flow must be avoided for meters equipped with RV, IN or INA pulsers for remote evaluation. If the plant design cannot ensure this, a
nonreturn valve must be installed.
Special requirements - differential measurements
For differential measurements, one meter is installed in the pipe for supply and return flow respectively. The difference between the supply
and return flow volumes determines the consumption.
If ordered with the "differential measurement" option, VZFA meters are calibrated in accordance with the indicated supply and return flow
volumes. Make sure that these meters are installed in the correct pipes, i.e. the supply flow meter should be installed in the pipe that
supplies the consumer and the return flow meter should be installed in the return pipe.
Special requirements - ships
On ships, attention is needed to ensure that the engine can continue to operate at full power even if there is heavy filter contamination or
if the meter is damaged. A pressure switch can be used to switch over to the bypass and to draw attention to the need for servicing. The
engine then continues to operate but without consumption measurements.
Monitor
Monitor
Tank
Tank
Pump
Pump
Filter
Filter
Valve
Valve
Pressure switch
Solenoid valve
Solenoid valve
Pressure switch
Engine
Engine
Intermediate
tank
Return
IAS
IAS
Oilmeter
Oilmeter
Valve
Supply
flow
Ship classification societies require the installation of bypass pipes. The relevant regulations must be followed.
