Badger Meter 7500 Series Mag Meter - Manual (Page 3)

PIPING CONFIGURATION
PARTIALLY FULL PIPE SITUATIONS
Magnetoflow ® meters are designed to operate in closed, full
pipes.
It is relatively common to encounter situations where the pro-
cess pipe will remain momentarily partially filled due to certain
hydraulic conditions. Examples of this include discharge to the
atmosphere (lack of back pressure), insufficient line pressure,
gravity flow applications, etc. (see figure above)
To eliminate the negative effect of these situations on the per-
formance of Magnetoflow® meters, a few guidelines should
be observed:
· Avoid installing the detector in the highest point of
the pipe line.
· Do not install the detector in vertical, downward flow
sections of the pipe.
· On-Off valves should ALWAYS be located on the
downstream side of the detector.
· Select the recommended vertical orientation when
ever possible.
· Make sure the selected detector size complies with
the application flow rate. Do not oversize pipe line
and detector size.
GROUNDING
Proper grounding is vital to ensure a good mag meter opera-
tion.
To ensure proper grounding, the 7500P mag meter is provided
with a set of protective grounding rings. The rings also serve
as protection for the liner.
The main purpose of the ground connection is to provide
electrical continuity between the liquid media, the amplifier’s
input ground or zero voltage reference, and a good, solid earth
ground.
Connect a grounding strap to a solid, local earth ground (tower
structure or pipe support) (see illustration). It is recommended
to use copper wire, at least gauge AWG 12.
When installing meter, also use standard gaskets to avoid
leaks.
3
WRONG RIGHT
FL
O W
FL
O W
FL
O
W
WRONG
FL
O W
RIGHT
Protective Grounding Rings
Good Local
Earth Ground
Protective Grounding Ring
(ANY POSITION)
STRAIGHT PIPE RUN
PUMP
CHECK VALVE
NEEDLE VALVE
GLOBE VALVE
(FULLY OPENED)
GATE VALVE
BALL VALVE
TEE
ELBOW
NO PUMPS
ANY VALVE
TEE
NO REQUIREMENT
PIPE REDUCERS
5-7 D
2 D 3 D
ELBOW
UPSTREAM DOWN STREAM