Mounting A Centering Disc For Pipe Installations - Emerson ROSEMOUNT 5300 Reference Manual

Reference Manual
00809-0100-4530, Rev BA
July 2009
Mounting a Centering
Disc for Pipe
Installations
Table 3-7. Choose the right
centering disc diameter for a
particular Pipe Schedule.
Table 3-8. Outer diameter for
discs according to disc size.
To prevent the probe from contacting the bridle wall when replacing displacers
or installing in pipes, centering discs are available for rigid single, flexible
single, and flexible twin lead probes. The disc is attached to the end of the
probe and thus keeps the probe centered in the bridle. The discs are made of
stainless steel, Alloy C-276, or PTFE.
When mounting a centering disc, it is important that it fits correctly in the pipe.
See Table 3-7 for the appropriate disc diameters.
Pipe Size 5s,5 10s,10
2 in. 2 in. 2 in.
3 in. 3 in. 3 in.
4 in. 4 in. 4 in.
5 in. 4 in. 4 in.
6 in. 6 in. 6 in.
(1)
7 in. NA NA
8 in. 8 in. 8 in.
(1) Schedule is not available for pipe size.
(2) No centering disc is available.
This table shows the actual outer diameter for discs.
Disc Size Actual Disc Diameter
2 in. 1.8 in. (45 mm)
3 in. 2.7 in. (68 mm)
4 in. 3.6 in. (92 mm)
6 in. 5.55 in. (141 mm)
8 in. 7.4 in. (188 mm)
Mounting a Centering Disc on Flexible Single Probes
Centering disc
Tab washer
Bolt
Tab washer
Rosemount 5300 Series
Pipe Schedule
40s,40 80s,80
2 in. 2 in.
3 in. 3 in.
4 in. 4 in.
4 in. 4 in.
6 in. 6 in.
(1)
6 in. 6 in.
8 in. 8 in.
1. Mount the centering disc at the
end of the weight.
2. Make sure that the tab washer
is properly inserted in the
centering disc.
Weight
3. Fasten the centering disc with
the bolt.
4. Secure the bolt by folding the
tab washer.
NOTE!
When using centering discs made of
PTFE, note that the maximum
temperature is 392 °F (200 °C).
120 160
(1) (2)
NA NA
(1)
NA 2 in.
4 in. 3 in.
4 in. 4 in.
4 in. 4 in.
(1) (1)
NA NA
6 in. 6 in.
3-25