20
MAGFLO
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3. Product selection guidelines
Product selection
guidelines
Avoid a vacuum in the measuring pipe, since
this can damage certain liners.
See "Specifications", section 2.
The flowmeter can be installed between two
reducers.
With an 8° reducer the following pressure drop
curve applies. The curves are applicable to
water.
Example:
A flow velocity of 10 ft./sec. (V) in a sensor with
a diameter reduction from 4" to 3" (d
1
/d
2
= 0.8)
gives a pressure drop of 0.04 psi.
Vacuum
Installation in large pipes
The electrical potential of the liquid must al-
ways be equal to the electrical potential of the
sensor. This can be achieved in different ways
depending on the application:
A. Built-in grounding electrodes. (MAG 3100
and MAG 3100 W).
B. Direct metallic contact between sensor and
fittings. (MAG 1100 FOOD).
C. Wire jumper between sensor and adjacent
flanges. (MAG 1100 and MAG 3100).
D. Optional graphite gaskets on MAG 1100.
(Standard for MAG 1100 High temperature).
Potential equalization
(Grounding)
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