Mounting - ABB FV4000 Operating Instruction

Mounting

4 Mounting
Change from one to two columns
4.1 Installation Requirements
A Vortex or Swirl flowmeter can be installed at any point in the
pipeline system. However, the following installation conditions must
be considered:
• Compliance with the ambient conditions
• Compliance with the recommended inflow/outflow sections
• The flow direction must correspond to that indicated by the arrow
on the flowmeter sensor.
• Compliance with the required minimum interval for removing the
transmitter and replacing the sensor
• Avoidance of mechanical vibrations of the pipeline (by fitting
supports if necessary)
• The internal diameter of the flowmeter sensor and the pipe must
be identical.
• Avoidance of pressure vibrations at zero flow by fitting gates at
intervals in long pipeline systems
• Attenuation of alternating (pulsating) flow during piston pump or
compressor conveying by using appropriate damping devices.
The residual pulse must not exceed 10 %. The frequency of the
conveying equipment must not be within the range of the
measuring frequency of the flowmeter.
• Valves / gates should normally be arranged in the flow direction
downstream of the flowmeter (typically: 3 x DN). If the medium is
conveyed through piston/plunger pumps or compressors
(pressures for fluids > 10 bar (145 psi)), it may be subject to
hydraulic vibration in the pipeline when the valve is closed. If this
does occur, the valve absolutely has to be installed in the flow
direction upstream of the flowmeter. Suitable damping devices
(e.g. air vessels) might need to be fitted.
• When fluids are measured, the sensor must always be filled with
media and must not run dry.
• When fluids are measured and during damping there must be no
evidence of cavitation.
• The relationship between the temperature of the media and the
ambient temperature has to be taken into account (see "Ambient
conditions" in the section titled "Technical data").
• At high media temperatures > 150 °C (302 °F), the flowmeter
sensor must be installed so that the electronics are pointing to
the side or downward.
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4.2 Recommended inflow and outflow sections
4.2.1 Vortex flowmeter
In order to maximize operational reliability, the flow profile at the
inflow end must not be distorted if at all possible. Provision should be
made for an inflow section measuring approx. 15 times the nominal
diameter. At elbows, the inflow section should measure at least 25
times the nominal diameter, at round elbows 40 times the nominal
diameter and where shutoff valves appear in the inflow section, 50
times the nominal diameter. A value 5 times the size of the nominal
diameter is required at the outflow end.
15xD
15xD
18xD
20xD
Fig. 13: Recommended inflow and outflow sections
4.2.2 Swirl flowmeter
On account of its operating principle, the Swirl flowmeter functions
virtually without inflow and outflow sections. The figure below shows
the recommended inflow and outflow sections for various
installations. Inflow and outflow sections are not required if the elbow
radius of single or double pipe elbows upstream and downstream of
the meter is greater than 1.8 x D. Similarly, additional inflow and
outflow sections are not required downstream of reductions with
flange transition pieces conforming to DIN 28545 (α/2 = 8).
3D
3D
3D
Fig. 14: Recommended inflow and outflow sections
FV4000 / FS4000
5xD
25xD
5xD
40xD
5xD
50xD
5xD
3D
1D
3D
1D
5D
1D
min 1,8 D
5xD
5xD
5xD
G00928
3D
3D
1D
G00929
D184B097U02