16
CONTOIL
®
Stop valves or cocks
In order to avoid backflow and draining, stop valves must be mounted after the meter.
Backflow and draining cause faulty measurements and may damage the meter.
Dirt filter, Safety filter
Filters should be fitted to prevent any damage to the meter from impurities in the liquid.
* If a dirt filter with the given mesh size is used, the safety filter in the meter
inlet can be removed.
The filter mounted in the meter inlet is only a safety filter and is too small to act as a dirt filter.
Heat insulation
The measurement transducer must not be insulated. This could cause its permitted temperature range to be exceeded.
Maximum mesh width for filters
Nominal
Meter type
size
VZF, VZO
VZFA, VZOA
DN15
0,250 mm
0,100 mm
DN20
0,400 mm*
0,100 mm
DN25
0,400 mm*
0,250 mm
DN40
0,600 mm
0,250 mm
DN50
0,600 mm
0,250 mm
No heat insulation
in this area
Heating coil (winding)
Pipe
Heat insulation
The permitted temperature ranges for the meter must be observed.
Tank
Filter
Pump
Oilmeter
Valve
