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3.1.3.4 Temperature limits of pump type FZ
Depending on the design, different maximum pumping media temperatures are
permissible for pumps of the FZ 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 4:
Max. permissible pumping media temperature in [°C] for FZ
Temperature limit of pump type FZ (Ex-Inside) Zones 1 & 2
FZ 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
Gb / Gc T1-T3 is T
Pumping medium
≤ 100 °C.
3.1.3.5 Temperature limits of pump types FPM/FSM/FZM
The temperature increase compared to the medium temperature on liquid-
lubricated magnetic couplings during normal operation depends on the medium
flow or pressure difference of the circulation as well as the physical thermal values
of the pumping medium.
For the maximum permissible pumping media temperature, the marking on the
rating plate and the
"Design data sheet for the magnetic coupling"
in the enclosed
documents must be observed.
FPM/FSM/FZM
pumps
- A complete filling of the magnetic coupling and the pump with
medium is strictly necessary.
- Short-term dry running, e.g., at the start, is only permitted after
examination and written confirmation by
Fristam
.
- Dry running is not permitted at speeds above 1500 rpm!
Temperature limits of pump types FPM/FSM/FZM
Compliance with the temperature class or the maximum permissible
surface temperature during normal operation is ensured by a measuring
point on the containment shell. The containment shell temperature may
