Badger Meter COIN-NW User Manual
Installation and Instruction
Manual
MODEL COIN
Flow Meters
PRESO COIN LOCATION INSTRUCTIONS
Straight pipe requirements: Accuracy is affected by the piping configurations due to
the disturbances of the flow profile. A fully developed symmetrical flow profile is
achieved with the minimum upstream and downstream recommended lengths.
NOTES:
1 - For upstream and downstream lengths equal to one half the values shown
add 1 percent to the accuracy value.
2 - Any flow conditioner shall be installed in the straight length between the
primary element and the upstream distance, or the fitting closest to the
element. The straight lengths between fitting and conditioner shall be at
least 10D and the length between conditioner and Coin Meter shall be at
least 15D.
3 - For other fittings, configurations, contact PRESO.
STRAIGHT PIPE RUN REQUIREMENTS
As with most flow elements, proper operation and performance is dependent on
the required lengths of unrestricted upstream and downstream piping. The recommended minimum length of the upstream side of the COIN Flow Element depends on the type of fitting at the start of the straight run, and the pipe configuration. Minimum upstream and downstream lengths are shown in the location instructions on back page. The minimum lengths will cause a slight coefficient shift.
SELECTING A MOUNTING LOCATION
A horizontal installation is recommended for all COIN elements rotated 90° along
the pipe center line (Figure 1).
This method of mounting allows for free passage of solids and eliminates air entrapment at the transmitter connection. Other positions are acceptable provided
proper venting of the transmitter is accomplished and differences in lead line elevations are considered. Vertical installations as shown in Figure 2 may introduce
a slight hydrostatic head effect, which must be considered when zeroing the
transmitter. Connections between the COIN Meter and the transmitter should be
3/8” tubing minimum. The use of a 3-valve manifold is recommended for zeroing
the transmitter.
Before installation of any COIN element inspect for damage; particularly at sealing surfaces. Any damage should be reported to Preso Meters as soon as possible. Each flow element has an arrow indicating the required direction of flow.
Failure to properly orient the COIN element may cause improper results when
using data supplied for an element that has been calibrated.
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