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FEM610 |
PROCESSMASTER | OI/FEM610-EN REV. A
5 . . .Installation
. . .Installation conditions
Minimum distance
ProcessMaster FEMxxx
Distance D: ≥ 3.3 ft (1.0 m)
Figure 10 Minimum distance
Inlet and outlet sections
The metering principle is independent of the flow profile as
long as standing eddies do not extend into the metering
section, such as may occur after double elbows, in the event
of tangential inflow, or where half-open gate valves are
located upstream of the flowmeter sensor.
In such cases, measures must be put in place to normalize the
flow profile.
Do not install fittings, manifolds, valves, etc., directly
in front of the flowmeter sensor.
Inlet and outlet section: Length of straight inlet and
outlet section of the flowmeter sensor.
Experience has shown that, in most installations, inlet
sections 3 x DN long and outlet sections 2 x DN long
are sufficient (DN = nominal diameter of the
flowmeter sensor).
For test stands, the reference conditions of 10 x DN
inlet section and 5 x DN outlet section must be
provided, in accordance with EN 29104 / ISO 9104.
Valves or other turn-off components should be
installed in the outlet section.
Butterfly valves must be installed so that the valve
plate does not extend into the flowmeter sensor.
Double elbow
Turn-off component
1
2
A
B
Figure 11 In- and outlet section, turn-off component