Altometer
5
Table 2
Maximum medium temperatures for EEx d flowmeters DN25-150
Maximum medium temperature ( in °C)
Temperature
class
(for gasses)
T
a
=
40°C
40 < T
a
=
50°C
50 < T
a
=
60
°C
T5
50
not possible
not possible
T4
100
95
80
T3
150
150
80
Table 3
Maximum medium temperatures for EEx q flowmeters DN25-150
Maximum medium temperature ( in °C)
Temperature
class
(for gasses)
T
a
=
40°C
40 < T
a
=
50°C
50 < T
a
=
60
°C
T6
80
80
75
T5
95
95
80
T4
130
130
80
T3
150
(130)
150
(130)
80
Table 4
Maximum medium temperatures for EEx q flowmeters DN200-300
and EEx e flowmeters DN200-300 and 350-3000.
The minimum process (medium) temperature for all DN sizes is -40 °C.
For the special version Optiflux 4300 C- .../RT-EEx, only possible for EEx e
flowmeters sizes DN200-300 or DN350-3000, the limit temperature for T3 is
restricted to 130 °C (see values in brackets in line T3 of table 4).
This special version can be recognized by the suffix "RT" in the name of the
flowmeter shown on the data sticker.
For dust hazardous areas, the maximum surface temperature is equal to the medium
temperature with a minimum of 85 °C.
