Unobstructed Flow Requirements - GE PanaFlow MV80 User Manual

Chapter 2. Installation

2.1.2 Unobstructed Flow Requirements

Select an installation site that will minimize possible distortion in the flow profile. Valves, elbows, control valves and
other piping components may cause flow disturbances. Check your specific piping condition against the examples
shown in Figure 4 below. In order to achieve accurate and repeatable performance install the flowmeter using the
recommended number of straight run pipe diameters upstream and downstream of the sensor.
Note: For liquid applications in vertical pipes, avoid installing with flow in the downward direction because the pipe
may not be full at all points. Choose to install the meter with flow in the upward direction if possible.
Example 1.
One 90° elbow before meter
Example 2.
Two 90° elbows before meter in one plane
Example 3.
Two 90° elbows before meter out of plane (if three
90° bends present, double recommended length)
Example
Figure 4: Recommended Pipe Length Requirements for Installation of Series MV80 & MV82
10
A B
Flowmeter
A B
Flowmeter
C' C
Flow Conditioner
(if used)
A B
Flowmeter
C' C
Flow Conditioner
(if used)
Minimum Required
Upstream Diameters
No Flow
Conditioner
A A
1 10D N/A
2 15D 10D
3 25D 10D
4 10D 10D
5 20D 10D
6 25D 10D
D = Internal diameter of channel. N/A = Not applicable.
Example 4.
Reduction before meter
Example 5.
Expansion before meter
Example 6.
Regulator or valve partially closed before meter
(If valve is always wide open, base length
requirements on fitting directly preceding it)
With Flow Conditioner
C C'
N/A N/A
5D 5D
5D 5D
5D 5D
5D 5D
5D 5D
A B
Flowmeter
C' C
Flow Conditioner
(if used)
A B
Flowmeter
C' C
Flow Conditioner
(if used)
A B
Flowmeter
C' C
Flow Conditioner
(if used)
Minimum Required
Downstream Diameters
No Flow With Flow
Conditioner Conditioner
B B
5D 5D
5D 5D
10D 5D
5D 5D
5D 5D
10D 5D
PanaFlow™ MV80 & MV82 User's Manual