11
- If the operating company cannot guarantee that the pumping
media temperature or the surface temperature is within the
permissible temperatures, it must provide a monitoring system.
Monitoring parameters: Pumping media temperature or
surface temperature
The surface temperature depends on the operating conditions, the
ambient temperature and the temperature of the flow medium.
The specification of the Atex temperature class on the rating plates, in
the order-related documents and in the following tables "
Temperature
limits of the pump types"
must be checked and compared. If the values
differ, the lower value must be complied with as the maximum
permissible pumping media temperature.
In case of doubt or for further information, please contact
Fristam
Pumpen.
The following tables show the individual pump types. These specify the maximum
permissible temperature of the pumping medium in relation to the temperature class
in the installation area in accordance with DIN EN ISO 80079-36.
3.1.3.1 Temperature limits of pump t
ypes FP / FPE / FP…V / FPH / FPEH / FPH…V /
FSPE / FSP…V
Depending on the constructive design, different maximum pumping media
temperatures are permissible for pumps of the FP series.
If the pumping media temperatures are not specified in the documentation, the
lower value is permissible.
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 1
: Max. permissible pumping media temperature in [°C] for FP/FPE/FP…V/FPH/FPEH/
FPH…V/FSPE/FSP…V
Temperature limit of pump type FP/FSP (Ex-Inside) Zones 1 & 2
FP/FSP pumps in 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 Gc
/ Gb T1-T3 is T
Pumping medium
≤ 100 °C.
