Installation if the Pipe is Depressurized and Drained
1 . Drill or cut a hole in the pipe with a 1-7/8 inch (48 mm) drill or hole saw . Note the pipe wall thickness for use in calculating
sensor assembly depth . A location on the top of the pipe is best for overall performance and service life; however,
any radial location on the top half of the pipe is acceptable . Allow a minimum of 10 pipe diameters upstream and 5
downstream from the sensor of straight unobstructed pipe to allow full development of the flow profile .
2 . Install either a service saddle or welded pipe fitting (2 inch female NPT) on the outside diameter of the pipe over the 1-7/8
inch (48 mm) hole .
3 . Install the Badger Meter isolation valve and nipple onto the fitting using pipe thread sealant or Teflon® tape on all threads .
4 . Install the Badger Meter hex mounting adapter onto the valve assembly . Use pipe thread sealant on the adapter .
5 . Tighten the hex mounting adapter so that no stud is aligned with the center-line of the pipe . This could interfere with final
sensor alignment .
6 . Measure the depth and set the height of the nuts of the hex mounting adapter .
OTEE:
N
Badger Meter recommends that you purchase a Hot Tap insertion/removal Tool (Model HTT) for future service,
even if the sensor is installed in a drained system . The Model HTT allows you to remove the sensor sleeve
assembly from the pipe line without draining the entire loop where the sensor is mounted .
7 . In a fully depressurized and drained pipe, the sensor tube assembly may be installed by hand . If reinstalling into a drained
system thought to have been depressurized and drained, verify by very slowly opening the isolation valve .
a . Carefully and very slowly open the isolation valve to relieve any pressure that may have built up .
b . Fully open the isolation valve .
c . Push the sensor sleeve into the pipe with a slight twisting motion .
d . Guide the sensor collar holes over the three hex adapter studs until the collar rests on the nuts . Hex nuts should have
been previously set to the correct height .
e . Install the three lock nuts onto these studs at the top of the positioning collar and securely tighten .
8 . Loosen the two set screws in the positioning collar with a 3/32 inch Allen wrench .
9 . Align the sensor sight holes along the pipe axis using the alignment rod from the sensor installation kit . M
10 . Verify that the flow label arrow on the sensor matches the liquid flow direction inside the pipe .
11 . Tighten the positioning collar set screws .
OTEE:
N
As a backup to the flow label arrow, there is a small hole located beside one of the sight holes to also indicate the
upstream side of the sensor .
Installation into a Pressurized Pipeline
The Model HTT (Hot Tap Tool) provides the mechanical
advantage required to safety insert and remove a
Badger Meter hot tap flow sensor from line pressure, and
provides a restraint when removing the sensor from a
pressurized pipe .
Refer to
Figure 3
for identification and location of the HTT
parts described in this section .
For pipe sizes 2-1/2 inch and above, all Badger Meter sensors
are inserted 1-1/2 inches (38 mm) from the inside wall of the
pipe . The insertion depth is controlled by the position of the
hex nuts on the three threaded rods .
To calculate the distance (D) between the top of the sensor
hex mounting adapter and the bottom of the positioning
collar (the top of the hex nut),
ADD
the H dimension, pipe
wall thickness, and insertion depth, and
SUBTRACT
the total
from the overall sensor length . See the example and formula
on the next page, and refer to
Figure 4
.
Figure 3: Model HTT (Hot Tap Tool)
Hot Tap Installation for 225BR, 226BR, and 226SS
Page 7
February 2018
SEN-UM-01635-EN-11