HOT TAP INSTALLATION FOR 225BR, 226BR, AND 226SS
Badger Meter Series 200 hot tap style liquid flow sensors are designed for use in cases where pipelines will be in continuous
service, and depressurizing or draining the system for installation or service is not practical .
The Series 200 hot tap flow sensors are designed to be installed either in a depressurized pipe by hand, or “hot tapped” into a
pressurized pipeline . Both installation procedures are in this manual .
If there is the slightest possibility the pipe could be full
or pressurized, follow the installation for a pressurized pipe
. See
"Installation into a Pressurized Pipeline" on page 7
.
See
Figure 4
for the location or identification of the various parts described in the following procedures .
Sensor Assembly Depth and Alignment
The insertion depth and alignment of the sensor assembly are critical to the accuracy of the flow measurement . The flat end
of the sensor tube assembly
must be installed
1-1/2 inches (38 mm) from the inside wall of the pipe . To allow for variations
in wall thickness, lining or coatings, the depth adjustment is controlled by the position of the hex nuts on the three threaded
studs of the hex mounting adapter . The hex mounting adapter is provided with a 2 inch male NPT connection . Both gate and
ball valve units are provided with 2 inch nipples for mounting onto saddles and weld-o-lets .
Setting the Depth
1 . Position the hex nuts 14-7/8 inches (378 mm), minus the thickness of the pipe, from the outside diameter of the pipe . For
example, measure the wall thickness of the pipe from the coupon removed when the 1-7/8 inch (48 mm) hole was cut into
the pipe . If the pipe was 1/8 inch (3 mm) thick, subtract 1/8 inch (3 mm) from 14-7/8 inches (378 mm), or position the nuts
14-3/4 inches (375 mm) from the outside diameter of the pipe . This will allow the 16-3/8 inch (416 mm) sensor to protrude
1-1/2 inches (38 mm) into the pipe .
2 . Apply anti-seize thread lubricant, supplied with the sensor, to the threaded studs of the mounting adaptor .
Aligning the Impeller with the Flow
1 . To align the impeller with the flow in the pipe, align the two sight holes at the top of the sensor tube assembly with the
center line of the pipe . Make sure the alignment is made to the pipe, and not to a wall or surface near the sensor .
2 . To adjust, loosen the two set screws in the positioning collar with the 3/32 inch Allen wrench (supplied in the
installation kit) .
3 . Slip one end of the 1/4 inch x 18 inch steel rod (supplied in the installation kit) through the holes in the sensor tube .
4 . Rotate the sensor tube until the rod is centered on the pipe . Make sure the flow label arrow on the sensor matches the
liquid flow direction .
5 . Tighten the positioning collar Allen screws to lock the sensor sleeve assembly in position .
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 .
Hot Tap Installation for 225BR, 226BR, and 226SS
Page 6
February 2018
SEN-UM-01635-EN-11