Speck pumpen Normblock Installation & Operating Manual page 70

Pump
Shaft coupling
Motor
Motor supplied by the
operator
10 of 58
2 Safety
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.
An EC manufacturer's declaration is required for the shaft coupling; the shaft
coupling must be marked accordingly.
The motor has its own marking. The marking is maintained on the condition that the
temperatures the pump causes to develop at the motor flange and motor shaft are
permitted by the motor manufacturer.
The motors used by Speck Pumpen on pumps with ATEX certification meet this
condition.
Also see
● Temperature limits [⇨ 10]
2.10.2 Temperature limits
In normal pump operation, the highest temperatures are to be expected on the
surface of the pump casing and at the shaft seal.
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 class 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 order documentation.
Table 4: Temperature limits
Temperature class as per EN 13463-1
T1
T2
T3
T4
T5
T6
If the pump is to be operated at a higher temperature or if the pump is part of a
pool of pumps, contact Speck Pumpen for the maximum permissible operating
temperature.
If a pump is supplied without motor (as part of a pool of pumps), the motor specified
in the order documentation of the pump must meet the following conditions:
▪ The permissible temperature limits at the motor flange and motor shaft must be
higher than the temperatures generated by the pump.
▪ Contact the manufacturer for the actual pump temperatures.
2.10.3 Monitoring equipment
The pump (set) must only be operated within the limits specified in the order
documentation and on the name plate.
If the system operator cannot warrant compliance with these operating limits,
appropriate monitoring devices must be used.
Check whether monitoring equipment is required to ensure that the pump set
functions properly.
Contact Speck Pumpen for further information on monitoring equipment.
Normblock
Max. permissible fluid
temperature
Temperature limit of the pump
280 °C
185 °C
120 °C
85 °C
Only after consultation
with the manufacturer