ka yd en
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14
Insta lla tion Guid
elines
CLASSIC 800 Product Manual
ka yd en
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For v
ertical 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 v
ertical pipe with downward flow,
the following information must be considered:
•
A “waterfall effect” may occur in v
ertical 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 8).
•
The line should be full liquid/slurry at all times.
•
The switch/transmitter must be far enough from an open outlet that air cav
itation does not extend
to the sensing tip and cause a false flow signal. A constriction at the outlet av
oids 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 v
ertical piping, Kayden strongly recommends installing thermal switches 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 v
ertical grav
ity flow, the switch must be distant enough from an open outlet that air
cav
itation does not affect the sensing tip and cause a false flow signal. A constriction at the outlet av
oids
this problem.
•
A waterfall effect will occur in v
ertical 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.
4
Liquid
4
Gas
8
Liquid
(Partially Full)
4
Liquid
8
Gas
8
Sediment
4
Liquid
4
Gas
4
Liquid
4
Gas
Figure 7 - Horizontal Pipe, Sensor Positioning
Figure 8 - Vertical Pipe,
Flow Up & Down
8
Liquid
4
Gas
4
Liquid
4
Gas
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Summary of Contents for CLASSIC 800 Series
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