Richter MNK Series - Manual (Page 8)

Series MNK 200-150-315
Page 8
9230-053-en Revision 12
TM 8195 Edition 03/2011
When operating the pump, make sure that an
excessive deposit of dust is avoided (possibly
regular cleaning). This prevents the pump
surface from heating to above the admissible
temperature.
Table 1 below indicates the admissible medium
temperature, depending on the pump design, as a
function of the temperature class in accordance with
EN 13463-1.
Table 1
Temperature class
acc. to EN 13463-1 Limit value of the
temperature of the liquid
Lining material PE PFA/PTFE
Can material 2) CFK-F CFK-F
T6 (85 °C)
not certified to ATEX
T5 (100 °C)
T4 (135 °C) 90 °C 1) 125 °C 1)
T3 (200 °C) 90 °C 150 °C
T2 (300 °C) 90 °C 150 °C
T1 (450 °C) 90 °C 150 °C
1) Long life grease-lubricated rolling bearings: No restrictions.
Regreasable rolling bearings: Standard design with
rotary shaft seal
T4 only applies to operation up to 1750 rpm
2) The can material has been list in the data sheet.
The plant customer must ensure that the
prescribed operating temperature is observed.
The maximum admissible temperature of the
liquid medium at the pump inlet depends on the
temperature class and the selected lining material
required in each case.
2.6.8 Maintenance
For safe and reliable operation, it must be
ensured with regular inspection intervals that
the unit is properly serviced and kept in a
perfect technical condition.
Example: Functioning of the rolling bearings. The
mode of operation and operating conditions largely
determine the actual service life that can be attained.
Regular checks of the bearing pedestal area can
prevent excessive temperatures due to hot-running
rolling bearings, collision of the drive magnet
assembly against the lantern or even defective
bearing seals. See Section 7.2.
In regard to media containing solids, the maintenance
intervals must be set by the operator in accordance
with the conditions of operation.
If auxiliary systems (e.g. external flushing, cooling,
heating) are installed, a check must be made to see
whether monitoring facilities are required to safeguard
their operation.
2.6.9 Electric peripheral equipment
Electric peripheral equipment, e.g. pressure,
temperature and flow sensors etc. must
comply with the prevailing safety requirements
and explosion protection provisions.