KSB KWP-Bloc - Temperature Limits; Monitoring Equipment

2 Safety
11 of 64
KWP-Bloc
Example of such marking:
II 2 G c TX (EN 13463-1) or II 2G Ex h IIC T5-T1 Gb (ISO 80079-36)
The pump complies with the requirements of type of protection constructional safety
"c" to ISO80079-37.
Refer to the data sheet for the applicable temperature class.
Motor 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 KSB on pumps with ATEX certification meet this condition.
2.9.2 Temperature limits
In normal pump operation, the highest temperatures are to be expected in the area
of the rolling element bearings. The surface temperature at the pump casing
corresponds to the temperature of the fluid handled.
If the pump is heated, the operator of the system is responsible for observing the
specified temperature class.
The surfaces in the bearing bracket area must be freely exposed to the atmosphere.
The table below lists the temperature classes and the resulting theoretical
temperature limits of the fluid handled.
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
Temperature class to EN 13463-1 or ISO
80079-36
Maximum permissible
fluid temperature
T1 100°C
2)
T2 100°C
2)
T3 100°C
2)
T4 100°C
T5 Only after consultation
with the manufacturer
Temperature class T4 Based on an ambient temperature of 40°C and proper maintenance and operation,
compliance with temperature class T4 is warranted in the area of the rolling element
bearings. If the ambient temperature exceeds 40°C, contact the manufacturer.
Temperature class T5 A special design is required for compliance with temperature class T5 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, if there is no data sheet or if
the pump is part of a pool of pumps, contact KSB for the maximum permissible
operating temperature.
2.9.3 Monitoring equipment
The pump (set) must only be operated within the limits specified in the data sheet
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 KSB for further information about monitoring equipment.
2) Due to the maximum permissible fluid temperature