Xylem MPV - Manual (Page 87)

Installation, Operating and Maintenance Instruction
Model MPB, MPV
MPB 100-english page 83 Revision 02
Article No 771074115 Issue 01/2010
7.4 Lubrication and Change of Lubricant
7.4.1 Grease Lubrication – MPV Design Only
Re-greasing
Grease lubricated bearings with the possibility of
re-greasing must be re-lubricated all 4000
operating hours, but at least 1x year. Clean
lubricating nipples (G) first.
Lubricating grease quality ...
... K2K-20, KP2K-20, etc. as per DIN 51825:
- Lithium soap grease
- NLGI GRADE 2
- Temperature range -20 to 120 °C
- Dripping point > 175 °C
- Base oil viscosity 70 to 150 mm²/s at 40 °C
When changing the grease type, ensure
compatibility with the residual grease.
Quantity of re-greasing (approx. value)
Pump Size
Grease Quantity
Pressure Side
[cm 3 ]
MPV 100.1 23,0
MPV 100.2 23,0
MPV 125.1 33,0
MPV 125.2 33,0
Pump Size
Relubrication Intervals in Operating
Hours
3550 2950 2200 1750 1450
[min -1 ] [min -1 ] [min -1 ] [min -1 ] [min -1 ]
MPV 100.1 3300 3800 4500 5000 5500
MPV 100.2 3300 3800 4500 5000 5500
MPV 125.1 2500 3300 4300 4800 5000
MPV 125.2 2500 3300 4300 4800 5000
Relubrication intervals with activation durations of
approx. 50% (cycle duration 1 hour).
For activation durations of approx. 100%, halve the
relubrication intervals.
If the pump is left non-operational for a longer
time, the grease in the bearings should be
changed after 2 years.
7.5 Coupling
MPB Design:
No adjustment work is required.
MPV Design:
Check the clearance in the coupling components
regularly approx. every 1000 operating hours, but at
least 1x year, the radial clearance in the coupling parts
must be checked.
For couplings with rubber pads the following applies:
Unless a clearance in the couplings is necessary, the
coupling pads may wear out to approximately ¼ of
their usual thickness, before they have to be changed.
To measure the clearance in the coupling place a
mark on the O.D. of each coupling hub (see following
pic). Then fixing one hub, turn the opposite hub as far
as possible. Then measure the distance (∆S
V
)
between the marks of the coupling. If this measure
exceeds the value given in the chart, the packing must
be replaced. They must be replaced in sets.
Size 80 95 110 125 140 160 180 200 225 250 280 315 350 400
∆ S
v
[mm] 5,0 6,0 7,0 8,0 8,5 8,0 8,0 8,5 9,0 10,0 11,5 10,5 11,5 13,0
If wear is heavy, it must be assumed that the
motor is not properly aligned with the pump or
that the distance between the coupling sections
has changed. Replace worn elements and re-
install or adjust coupling, as described in
chapter 5.3.
7.6 Cleaning of pump
The pump must not be cleaned with pressurised
water - water will get into the bearings.
Dirt on the outside of the pump has an adverse effect
on transmission of heat. The pump should therefore
be cleaned with water at regular intervals (depending
on the degree of dirt).
8. Dismantling and repair of pump
8.1 General remarks
Repair to the pump or pump system may only
be carried out by authorised skilled personnel or
by the manufacturer’s specialist staff.
When disassembling the pump pay attention to
chapter 2 and chapter 4.1.
For mounting and repair you can order specialized
personnel if you want.
If dangerous liquids are pumped the appropriate
disposal of the handled liquid is necessary
before the disassembly of the pump. Pay
attention to the fact, that even in drained pumps
there are remainders of the handled liquid. If
necessary the pump must be flushed or
decontaminated. Laws must be observed,
otherwise danger to health is existing!
Before the disassembly the pump has to be
secured in such a way, that it can't be started.
The pump casing must be drained and without
pressure.
All locking devices in the suction- and discharge-
pipe must be closed.