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CLASSIC
®
800 Product Manual
Installation Guidelines
Vertical Pipe
For vertical pipe mounting, Kayden strongly recommends installing the switch/transmitter at a point of UPWARD
process flow to ensure continued total immersion of the sensing tip.
If there is no other option except to install the flow switch/transmitter in a vertical pipe with downward flow, the
following information must be considered:
•
A “waterfall effect” may occur in vertical pipe with low flow rates. The process may become substantially
aerated and will therefore cause the switch/transmitter to interpret the aeration as a lower flow rate (see
Figure 11).
•
The line should be full of the liquid/slurry at all times.
•
The switch/transmitter must be far enough from an open outlet that air cavitation does not extend to the
sensing tip and cause a false flow signal. A constriction at the outlet helps avoid this problem.
Vertical Pipe
- Side Mount (Acceptable)
•
Ensure sensing tip is fully inside the pipe wall as a minimum and to the center of the pipe as a
maximum.
•
When installing the switch in vertical piping, Kayden strongly recommends installing the switch/
transmitter at a point of UPWARD process flow to ensure continued total immersion of the sensing tip.
Vertical Pipe
- Side Mount - Downward Flow
•
Is only recommended for higher flow rates where the LINE IS KEPT FULL OF LIQUID/SLURRY.
•
For installation in a vertical gravity flow, the switch must be distant enough from an open outlet that air
cavitation does not affect the sensing tip and cause a false flow signal. A constriction at the outlet helps
avoid this problem.
•
A waterfall effect will occur in vertical pipe with low flow rates. Also, the process is likely to become
substantially aerated. The switch will interpret the aeration as a substantially lower flow rate and
possibly cause a false low flow alarm.
Vertical Pipe
- Side Mount - Top & Bottom Mount (Less Desirable)
Positioning the sensor on a corner or elbow is not recommended as
the process will be turbulent. The switch may interpret the turbulence
as a constantly changing flow rate and fail to alarm as required.
Figure 11 - Vertical Pipe,
Flow Up & Down
Figure 12 - Horizontal Pipe, Sensor Positioning
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Liquids
4
Gas
8
Liquid
(Partially Full)
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Liquids
8
Gas
8
Sediment
4
Liquids
4
Gas
4
Liquids
4
Gas
8
Liquids
4
Gas
4
Liquids
4
Gas
