11
The explosion-proof status of the pump set is only assured if the pump set is used in
accordance with its intended use.
Never operate the pump (set) outside the limits stated in the data sheet and on the name
plate.
Prevent impermissible modes of operation at all times.
2.10.1 Marking
The marking on the pump refers to the pump part only.
Example of such marking: II 2 G c TX
Refer to the Temperature limits table for the temperatures permitted for the individual pump
variants. ( Section 2.10.2 Page 11)
An EC manufacturer
,
s declaration is required for the shaft coupling; the shaft coupling must
be marked accordingly.
The motor must be considered separately.
2.10.2 Temperature limits
In normal pump operation, the highest temperatures are to be expected on the surface of
the pump casing, at the shaft seal and in the bearing areas.
The surface temperature at the pump casing corresponds to the temperature of the fluid
handled. If the pump is heated in addition, the operator of the system is responsible for
observing the specified temperature classes and fluid temperature (operating temperature).
The table below lists the temperature classes and the resulting theoretical temperature limits
of the fluid handled (a possible temperature rise in the shaft seal area has already been taken
into account).
The temperature class specifies the maximum permissible temperature at the surface of
the pump set during operation. For the permissible operating temperature of the pump in
question refer to the data sheet.
Table 4: Temperature limits
Based on an ambient temperature of 40 °C and proper maintenance and operation, compliance
with temperature class T5 is warranted in the area of the rolling element bearings. If the
ambient temperature exceeds 40 °C, contact the manufacturer.
A special design is required to comply with the requirements of temperature class T6 in the
bearing area.
Misuse, malfunctions or non-compliance with the instructions may result in substantially
higher temperatures.
If the pump is to be operated at a higher temperature, the data sheet is missing or if the
pump is part of a pool of pumps, contact PUMPIRAN for the maximum permissible operating
temperature.
Temperature class as per EN 13463-1
M aximum permissible fluid
temperature
T1
Maximum 400 °C
2)
T2
280 °C
T3
185 °C
T4
120 °C
T5
85 °C
T6
Only after consultation
with the manufacturer
2) Depending on the material variant
Pump
Shaft coupling
Motor
Temperature class T5
Temperature class T6
2 Safety
