Operating Instructions
OIO 15en Edition 2020-05
21
Safety instructions for installation and removal
Installation, removal and connection
Installation, removal and connection
Safety instructions for installation and removal
Installation
KRAL flowmeters can be operated in any installation position.
Notice:
Both directions of flow are possible. The preferred flow direction is indicated on the rating plate by
means of a bright arrow, see Fig. 2, page 7.
Installation types
The arrow with dashed line identifies the preferred flow direction when an operating filter is used.
The following safety instructions must be observed:
□
KRAL flowmeters are precision measuring devices.
▪
Ensure cleanliness and take care during installation and removal.
▪
Do not take apart the flowmeter.
▪
Do not remove the protective caps from the dry sleeves during installation. Put the protective
caps on the dry sleeves during removal.
▪
Installation: Only remove the screw plugs in order to insert the temperature sensors.
▪
Removal: Screw in the screw plugs again after the temperature sensors have been removed.
▪
If installing a trace heating system, pick up, temperature sensor, junction box and
corresponding cables have to be free of heat insulation, see "Trace heating system", page 9.
Fig. 1
OME installation types
Installation type
Properties
1
□
Without bypass
□
With or without operating filter
□
Small space requirements
□
Dismantling of the flowmeter only with
interruption of operation
2
□
Manual bypass
□
With or without operating filter
□
Bypass is opened manually
□
Dismantling of the flowmeter only with
interruption of operation
3
□
Bypass with 3 non-return valves for flange
connection
□
With or without operating filter
□
Dismantling of the flowmeter without
interruption of operation
4
□
Bypass with 3 non-return valves for pipe
thread connection
□
With or without operating filter
□
Dismantling of the flowmeter without
interruption of operation
□
Minimally higher pressure loss
1
2
3
4
