Servicing, Maintenance; General Remarks; Mechanical Seals; Stuffing Boxes - ITT MPB Series Einbau-, Betriebs-, Wartungshandbuch

Installation, Operating and Maintenance Instruction
6.8.2 Measures for longer putting out of operation
Pump remains installed and in ready for operation:
Test runs of 5 min. duration must be made in
regular intervals. The span between the test runs
is depending on the plant. However, it should be
made once a week, at least.
6.8.3 Longer periods of non-operation
After long stationary periods, packing may have
hardened; these must be replaced before start-
up.
When starting up, follow the instructions for
starting up for the first time (see chapter 6)!

7. Servicing, Maintenance

7.1 General remarks

Maintenance and servicing work must only be
carried out by trained, experienced staff who
are familiar with the contents of these Operating
Instructions, or by the Manufacturer's own
service staff.
Work should only be carried out on the pump or
pump unit when it is not in operation. You must
observe chapter 2.

7.2 Mechanical seals

Before opening the pump, it is essential that you
note chapter 2 and chapter 8.
If the liquid being handled leaks out at the mechanical
seal, it is damaged and must be replaced.
Replace the mechanical seal according to Section 8.6
"Replacing the Shaft Seal".
Mech. seals do not need to be maintained and are
completely free of leakage. Pumps with mech. seals
must only be operated when completely filled and
vented. The mechanical seal chamber must always
remain filled with liquid during operation of the pump.
If the liquid being handled drips out at the mechanical
seal, it is damaged and must be replaced.
When installing the mechanical seal make sure that
the seal casing is absolutely clean, particular care has
to be paid to the surface of the seal rings. To facilitate
the slip-on of the rotating components of the seal onto
the shaft lubricate all moving components and sliding
areas by means of water, soapy water or soft soap.
Use mineral oils only in case all elastomers are oil
resistant. Do not lubricate the surface of the seal rings.
Do not force elastomeric elements over sharp edges,
if necessary use assembling aiding sleeves.

7.3 Stuffing boxes

Stuffing boxes require constant maintenance, see
chapter 6.2 section "Stuffing box". If the leakage rate
can no longer be set correctly, the packing is worn out
and must be replaced in good time (increased wear on
MPB 100-english
Article No 771074115
a) Filled pumps
Switch stand-by pumps on and immediately off
again once a week. Possibly use as main pump.
If the stand-by pump is at operating pressure and
temperature, leave all sealing, flushing and
cooling systems switched on.
MPV Design: Replace the grease in the bearings
after 2 years.
Stopfbuchspackung nicht bis zur Leckagefreiheit
festziehen.
b) Drained pumps
Turn shaft at least 1x week (do not switch on
because of dry running).
MPV Design: Replace the grease in the bearings
after 2 years.
shaft sleeve). Replace the packing gland according to
Section 8.7 "Replacing the Shaft Seal".
If employing new packing tight at the beginning the
gland only gentle (heavy leakage). Arrange ends of
packing rings at opposite positions (refer to drawing).
After a while tighten the gland smoothly until leakage
is reduced to only a few drops per minute. Avoid dry
run.
Method of opening packing rings to fit over shaft
Joints staggered
Because of the risk of accidents, addition of
packing to pumps during operation or at
operating pressure or temperature is strictly
forbidden!

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
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.
page 86
Model MPB, MPV
correct
must be re-lubricated all 4000
incorrect
Revision 01
Issue 12/2006