Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

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 3-7for the appropriate disc diameters.

 

 

 

Pipe Schedule

 

 

Pipe Size

5s,5

10s,10

40s,40

80s,80

120

160

2 in.

2 in.

2 in.

2 in.

2 in.

NA(1)

NA(2)

3 in.

3 in.

3 in.

3 in.

3 in.

NA(1)

2 in.

4 in.

4 in.

4 in.

4 in.

4 in.

4 in.

3 in.

5 in.

4 in.

4 in.

4 in.

4 in.

4 in.

4 in.

6 in.

6 in.

6 in.

6 in.

6 in.

4 in.

4 in.

7 in.

NA(1)

NA(1)

6 in.

6 in.

NA(1)

NA(1)

8 in.

8 in.

8 in.

8 in.

8 in.

6 in.

6 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

1.

Mount the centering disc at the

 

 

end of the weight.

 

2.

Make sure that the tab washer

Tab washer

 

is properly inserted in the

Weight

centering disc.

 

 

3.

Fasten the centering disc with

 

 

the bolt.

Bolt

 

 

 

4.

Secure the bolt by folding the

Tab washer

 

tab washer.

 

 

NOTE!

When using centering discs made of PTFE, note that the maximum temperature is 392 °F (200 °C).

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Emerson Process Management 5300 manual Mounting a Centering Disc for Pipe Installations