WIKA TW61 Mode D'emploi page 9

4. Design and function
For model TR22-B resistance thermometer
2) In the event of replacement, select a resistance thermometer measuring insert model TR11-A.
The corresponding sensor length, l
Insertion length U + neck tube length M (85 mm) + 5 mm pre-load + 10 mm head dimension
1
DIN 11866 series A or metric
Nominal Nominal
width of pressure
tube in bar
OD PN
3) 4)
10 25
15 25
20 25
25 25
32 25
25
40
50 25
65 16
80 16
100 12.5
3) Maximum operating temperature 150 °C
4) All thermowells of this model series which are exposed to internal pressure and have a nominal diameter (DN) of
> 25 mm are manufactured and tested in accordance with module H of the pressure equipment directive.
WIKA operating instructions thermowell, model TW61
, is calculated as follows:
5
Outer Tube wall
diameter thickness
of pipe
Ø D s
13 1.5
19 1.5
23 1.5
29 1.5
35 1.5
41 1.5
53 1.5
70 2.0
85 2.0
104 2.0
Tube Thermowell
length insertion
length
TL U
1
70 6
70 9
80 11
100 18
110 18
120 18
160 30
210 30
260 45
310 45
EN
Neck tube
length
TR21-B TR22-B
M M
51 129
48 126
46 124
39 117
39 117
39 117
27 105
27 105
12 90
12 90
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