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Temperature switch OTR31, OTR35
Max. ambient temperature
up to 25 °C (77 °F)
up to 40 °C (104 °F)
up to 60 °C (140 °F)
up to 85 °C (185 °F)
11.6.2
Process pressure range
Maximum permitted process pressure depending on the insertion length
P (psi)
P (bar)
1500
100
1200
80
900
60
600
40
300
20
0
0
0
0
15
Maximum permitted process pressure
L
Insertion length
p
Process pressure
The diagram takes into consideration not only the overpressure but also the compressive load
caused by flow, wherein a safety factor of 1.9 has been applied for operation with flow. Due to
the increased bending stress caused by flow, the maximum permitted static operating
pressure is lower in the case of longer insertion lengths.
This calculation is based on the maximum permitted flow velocity for the respective insertion
length (see diagram below) .
The maximum process pressure for the conical metal-metal process connection for
hygienic processes (MB option) for the device is 1.6 MPa = 16 bar (232 psi).
Permitted flow velocity depending on the insertion length
30
60
90
1
2
3
4
Max. process temperature
No restrictions
135 °C (275 °F)
120 °C (248 °F)
100 °C (212 °F)
120
150
180
L (mm)
5
6
7
L (in)
Technical data
210
240
270
8
9
10
11
300
12
A0008063
35
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