Richter V&A RMI Series, Инструкция по установке и эксплуатации

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Series RMI
Page 16
9430-050-en Revision 00
TM 9886 Edition 03/2018
7 Maintenance
7.1 Safety related screw connec-
tions
After initial loading by the operating pressure and op-
erating temperature the tightening torques of all con-
nection screws must be checked at the following
points:
♦ housing flange
♦ suction flange
♦ discharge flange
♦ draining flange
See also Section 6.1.1, para. 1 .
Other inspections are to be performed regularly,
depending on the operating requirements.
7.2 Bearing pedestal
The temperature of the bearing pedestal is
not to exceed more than 70 °C and under
no circumstances 80 °C.
At higher temperatures, call in qualified staff without
delay. If this is not possible, the pump must be shut
down and taken out of service.
In many cases a vibration measurement is recom-
mended to detect bearing wear in good time.
7.2.1 Long life grease lubrication
Grease fill bearings of the series 2RS are installed as
standard features. The grease is lithium-saponified.
The admissible temperature range is – 30 °C to
+ 110 °C.
The rolling bearings are designed for an L10 service
life of >17,500 hours. The service life of the grease
filling guaranteed by the bearing manufacturers is
given in the following table.
Size Bearing size > Service life
Group 1.1 6207-2RS / 17,500 hr*
Group 1.2 6207-2RS / 17,500 hr*
Group 1.3 6210-2RS / 17,500 hr*
* at bearing temperature < 50 °C,
at bearing temperature 70 °C approx. 10,000 hr
If the pump is serviced, it is recommended to also
replace the bearings as a precaution.
In potentially explosive works it is
advisable to monitor the condition
of the rolling bearings
7.2.2 Oil bath lubrication
With an expected bearing temperature of about 70°C
we recommend a mineral oil with the following char-
acteristics:
Viscosity index : approx. 85
Kinematic viscosity at 40°C :
s
2
mm
40 . ca
A fully synthetic gear oil to ISO VG 220 is to be used
for temperatures below – 20 °C.
Replacing the bearings : The ball bearings are de-
signed for an L10 service life of >17,500 hours.
We recommend 17.500 working hours respectively
every 3 years a change of bearing should be made.
Oil changes: 1x per year at bearing temperatures
of about 50 °C.
Every 6 months at bearing temperatures of about
70 °C.
At higher temperatures more frequently in accord-
ance with the regulations.
When the pump is serviced, it is recommended to
replace the bearings and shaft seals as a precaution
and to pour in fresh oil.
Oil level check
: The oil level is to be regularly
checked on the constant level oiler 638/1 to ensure
safe operation.
It must be ensured that there is always oil in the
constant level oiler; it must under no circumstances
be completely drained.
A pump with oil sight glass has to have at least as
much oil in the pump, that the oil level in the sight
glass is visible.
In potentially explosive works it is
advisable to monitor the condition
of the rolling bearings
If there is a suspicion that splash water could have
entered the bearing pedestal, the oil must be re-
placed immediately. Even small amounts of water in
the oil reduce the service life of the rolling bearings
to a fraction of the normal service life.