15
Temperature limit of pump type FL (Ex-Inside) Zones 1 & 2
FL pumps for which an occasional occurrence of explosive gas
atmospheres within the pump is permissible (category 2; IIB; EPL Gb /
Gc; additional marking on rating plate X), the following must be
observed:
- Explosive atmospheres within the pump with the temperature
class assignment T4, T5 and T6 are not permitted.
- The max. permissible pumping media temperature for the EPL
Gb / Gc T1-T3 is T
Pumping medium
≤ 100 °C.
3.1.3.8 Temperature limits of pump type FKL
Depending on the constructive design (*temperature displacer), different max.
pumping media temperatures are permissible for pumps of the FKL series:
Temperature class;
Temperature limit
value
Max. permissible
surface temperature [°C]
Max. permissible
pumping media
temperature [°C]
T1
450
≤ 95/135*
T2
300
≤ 95/135*
T3
200
≤ 95/135*
T4
135
≤ 95/100*
Table 7: Max. permissible pumping media temperatures in [°C] for pump type FKL
3.1.3.9 Temperature limits of pump type FDS
Temperature class;
Temperature limit
value
Max. permissible
surface temperature [°C]
Max. permissible
pumping media
temperature [°C]
T1
450
≤ 150
T2
300
≤ 150
T3
200
≤ 150
T4
135
≤ 100
Table 8: Max. permissible pumping media temperature in [°C] for FDS
Temperature limit of pump type FDS (Ex-Inside) Zones 1 & 2
FDS pumps for which an occasional occurrence of explosive gas
atmospheres within the pump is permissible (category 2; IIB; EPL Gb /
Gc; additional marking on rating plate X), the following must be
observed:
- Explosive atmospheres within the pump with the temperature
class assignment T4, T5 and T6 are not permitted.
- The max. permissible pumping media temperature for the EPL
Gb / Gc T1-T3 is T
Pumping medium
≤ 100 °C.
