Permissible Pressure At The Thermowell; Thermowells 20, 22/23, 40, And 41/42 - JUMO EM Series Operating Manual

4.4

Permissible pressure at the thermowell

4.4.1

Thermowells 20, 22/23, 40, and 41/42

CAUTION!
The values given below refer to the maximum loading on the probe mounting concerned. The
maximum pressure which can be sealed depends on the mounting conditions and may possibly
be lower.
Steel thermowells 22, 23, 32, 41, 42 and 45
Material
Pipe
Screw-in nipple up to 300 °C
Weld-in nipple
Temperature in °C
100
150
200
300
350
Permissible incident flow velocity [m/s] at the maximum permissible pressure loading and differ-
ent immersion tube length "S"
Material
Temperature
Heat transfer
Pipe diameter D
(1) Air
(2) Water, oil
St38.8 I
Steel 1.0038
Steel 1.5415
Pipe diameter
8 × 0.75 mm
or conical
Maximum permissible pressure in bar
89
83
78
59
50
St38.8 I
200 °C
Air, water, oil
8 mm
10 mm
15 mm
m/sec
Pipe diameter
10 × 0.75 mm
72
67
63
47
40
_______
- - - - - - -
...............
(S) mm
4 Mounting
Pipe diameter
15 × 0.75 mm
48
45
42
32
27
(1)
(2)
19