Wrong – Badger Meter M-Series M3000 User Manual
Page 8
8
Straight Pipe Requirements
Suffi cient straight pipe runs are required at the detector inlet
and outlet for optimum meter accuracy and performance. An
equivalent of three (3) diameters of straight pipe is required on
the inlet (upstream) side. Two (2) diameters are required on
the outlet (downstream) side.
FORWARD FLOW
MINIMUM STRAIGHT PIPE
MINIMUM STRAIGHT PIPE
ELBOW
TEE
GATE VALVE
(FULLY OPEN)
MINIMUM STRAIGHT PIPE
CHECK VALVE
GLOBE VALVE
BUTTERFLY VALVE
PUMP
ELBOW
TEE
ANY VALVE
M-3000 Mag FLOWMETER
3 x D
7 x D
2 x D
D (Pipe Size)
D (Pipe Size)
MINIMUM PIPING REQUIREMENT
STANDARD CONCENTRIC
REDUCERS
(NO DISTANCE REQUIRED)
Pipe Reducer Requirements
With pipe reducers a smaller size meter can be mounted in
larger pipelines. This arrangement may increase low fl ow
accuracy.
There are no special requirements for standard, concentric,
pipe reducers.
Custom fabricated pipe reducers must have an approximate
slope angle of 15 degrees to minimize fl ow disturbances
and excessive loss of head. If this is not possible, install the
custom pipe reducers as if they were fi ttings and install the
amount of straight pipe stated previously.
Chemical Injection Applications
For water line applications with a chemical injection point,
install the meter upstream of the injection point. This
eliminates any meter performance issues.
If a meter must be installed downstream of a chemical
injection connection, the recommended distance between
the meter and the injection point must be signifi cant; 50 to
100 feet (15 to 30 meters). When the water/chemical solution
reaches the meter it must be a complete, homogeneous
mixture. If the injection point is too close, the meter senses
two (2) different liquids (conductivity is different for each) and
correct data output cannot be assured. The injection method:
spaced bursts, continuous stream of drips, a liquid or gas
can also affect downstream readings by the meter.
Sometimes it’s diffi cult to specify the exact downstream
placement distances because of the number of variables.
Contact Badger Meter Technical Support,
877-243-1010
, to
review your application if necessary.
Partially Filled Pipe Situations
It is possible to encounter situations where the process
pipe is momentarily only partially fi lled. Examples include;
lack of backpressure, insuffi cient line pressure, gravity fl ow
applications, etc.
To eliminate these situations:
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Do not install the meter in
the highest point of the pipeline
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Do not install the meter in a vertical,
downward fl ow section of pipe.