Partially-Filled Pipe Situations
In some locations, the process pipe may be momentarily only partially filled. Examples include: lack of back pressure,
insufficient line pressure and gravity flow applications.
To eliminate these situations:
• Do not install the meter at the highest point of the pipeline.
• Do not install the meter in a vertical, downward flow section of pipe.
• Always position the ON/OFF valves on the downstream side of the meter.
FLOW
FLOW
Figure 10: Incorrect meter placement
FLOW
WRONG
FLOW
RIGHT
Do not install in a vertical, downward position. Position "On/Off" valves on downstream side.
Figure 11: Position valves on downstream side
To minimize the possibility of partially-full pipe flows in horizontal, gravity or low pressure applications, create a pipe
arrangement that ensures the detector remains full of liquid at all times.
Figure 12: Pipe positioned to keep water in detector
Meter Location, Orientation and Applications
Page 10 February 2018MAG-UM-00507-EN-02
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