Installation for Direct Insert Models
These instructions are for the installation of flow sensors into piping systems that are
not
under pressure at the time of
installation . If the line must be tapped under pressure, a hot tap style sensor must be used . See the following section for hot
tap installation instructions .
Mounting
Adaptor
Stem
Stem Collar
Hex Cap
Cover
Pipe Saddle
(ref.)
Gasket
(ref)
O-Ring
O-Ring
Groove
O-Ring
Expanded View
Figure 4: Installation for direct insert model
The insertion depth and alignment of the sensor are critical to the accuracy of the flow measurement . The impeller must be at
the same location in the pipe as it was during calibration . Badger
Meter provides sensors with different stem lengths . Longer
stems are intended for use in larger diameter pipes and shorter stems for use in smaller pipelines . However, stem length has
no affect on the operation of the sensor provided that the impeller is positioned correctly in the pipe .
Direct insert models are available in stem lengths designated D1 and D2 . The D1 is intended for nominal pipe diameters from
1-1/2…10 in . (38…254 mm), and the D2 for pipe diameters from 12…36 in . (30…91 cm) . However, pipe with extra thick walls,
existing linings, or unusual tapping hardware may require longer length sensors . For these pipes, consult the factory . For
larger pipe sizes, hot tap style sensors equipped with an isolation valves are recommended .
The preferred method of installation is by means of a saddle with 1 in . NPT outlet . On steel pipelines a weld-on type fitting
may be substituted .
1 . Attach the saddle to a section of pipe that has at least 10 diameters of straight pipe ahead and five diameters of straight
pipe behind the saddle . Drill a minimum 1-1/8 in . (29 mm) diameter hole in the pipe .
2 . Remove the sensor assembly from the mounting hardware by loosening the hex cap over the stem collar and the cover to
the mounting adapter and detaching the assembly . Set aside taking care not to damage impeller/shaft assembly .
3 . Attach the pipe thread end of the mounting adapter to the saddle or weld-o-let using a pipe joint compound and tighten
the joint . Do not apply sealing compound to the top thread of the mounting adapter, it is sealed with an O-ring .
Mechanical Installation
Page 8
May 2017
SEN-UM-00217-EN-10
