Badger Meter COIN-NW - Manual (Page 3)

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 recom-
mended minimum length of the upstream side of the COIN Flow Element de-
pends on the type of fitting at the start of the straight run, and the pipe configura-
tion. Minimum upstream and downstream lengths are shown in the location in-
structions 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 en-
trapment at the transmitter connection. Other positions are acceptable provided
proper venting of the transmitter is accomplished and differences in lead line el-
evations 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 seal-
ing surfaces. Any damage should be reported to Preso Meters as soon as pos-
sible. 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.