Desmi NSL 100-215, Инструкция по эксплуатации и обслуживанию

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SAFETY
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby
– Denmark
Tlf. nr.: +45 96 32 81 11
Fax +45 98 17 54 99
15
E-mail: desmi@desmi.com www.desmi.com
2.8.1. Marking
The marking on the pump refers to the pump part only. DESMI’s standard EX marking for NSL
pumps is: Ex II 2G Ex h IIb T4 Gb X.
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 DESMI on pumps with ATEX certification meet this condition.
2.8.2. 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 max. allowed liquid temperature is 80°C for fresh water and most likely less for
other liquids.
If the pump is to be operated at a higher temperature or if the pump is part of a pool of pumps,
contact DESMI 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.
2.8.3. 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 DESMI for further information on monitoring equipment.
2.8.4. Operating limits
Refer to the chapter 1.4
– i.e. if there’s a risk of too high liquid temperatures, then a PT100 sensor
should be mounted in the pump casing. As standard the max. allowed liquid temperature is 80°C
for ATEX marked NSL pumps.