Emerson Rosemount 405P Skrócona instrukcja obsługi - Strona 3
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June 2016
1.0 Primary element location
Install the Rosemount 405 in the correct location within the piping branch to
prevent inaccurate measurement caused by flow disturbances.
Table 1. 405C Straight Pipe Requirements
Beta
Reducer
Single 90° bend or tee
Two or more 90° bends in the same plane
Two or more 90° bends in different planes
Up to 10° of swirl
Butterfly valve (75% to 100% open)
Downstream (outlet) side of primary
Table 2. 405P Straight Pipe Requirements
Beta
Reducer
Single 90° bend or tee
Two or more 90° bends in the same plane
Two or more 90° bends in different planes
Expander
Ball/gate valve fully open
Downstream (outlet) side of primary
1
Table 3. 405 Straight Run Requirements
™
Annubar
averaging pitot tube - sensor
size 1
Reducer
Expander
Single 90° bend or tee
Two or more 90° bends in the same plane
Two or more 90° bends in different planes
Butterfly Valve (75–100% open)
Ball/Gate Valve fully open
Downstream (outlet) side of primary
1. Consult an Emerson
2. If using flow straighteners, refer to ISO 5167 for recommended links.
3. Use straightening vane to reduce the required straight run length.
4. In plane means the Rosemount 405 is in the same plane as the elbow. Out of plane means the bar is
perpendicular to the plane of the upstream elbow. Refer to
™
Process Management representative if a disturbance is not listed.
(1)
(1)(2)
(1)
Without
straightening vane
In
Out of
(4)
(4)
plane
plane
12
12
18
18
8
10
11
16
23
28
30
30
8
10
4
4
Figure 1 on page 4
Quick Start Guide
(1)(2)(3) (4)
0.40
0.50
2
2
2
2
2
2
2
2
2
2
2
5
2
2
0.40
0.50
5
8
16
22
10
18
50
75
12
20
12
12
6
6
With straightening vane
From
From
straightening
disturbance
vane
8
8
8
8
8
8
8
4
.
0.65
2
2
2
2
2
5
2
0.65
12
44
44
60
28
18
7
(3)
4
4
4
4
4
4
4
4
3