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Series SD 35

• Check the operating data at all operating states possible in

the system (parallel operation of pumps, other delivery pur-
poses, etc.)

• Record readings for future reference.
• Check the bearing temperature. A temperature of 50°C above

the ambient temperature is acceptable.

4.3.3

Closed valve operation

4.4

Shut-down

4.4.1

Switching off

• Close the isolating valve in the discharge pipe.
• Switch off the pump.
• A non-return valve above which a corresponding pressure is

built by the liquid column makes the actuation of a discharge
side valve unnecessary.

• Close the additional valves.

4.4.2

Draining

• If frost is anticipated, drain any pumps or pipework not in use,

or take other precautions to prevent damage from frost.

• After pumping polluted media and to prevent corrosion when

not in use the pumps should be drained and, if necessary,
flushed.

5. Maintenance/servicing

5.1

Safety Notices

5.2

Maintenance and inspection

5.2.1

Lubricants, oil capacities and lubricating intervals

5.2.1.1

Pump with lubricated bearings greased for life
(standard execution)

The pumps are fitted with lubricated bearings greased for life in
the factory before delivery and this should last for approx.
15,000 working hours or two years. Under unfavourable work-
ing conditions such as a hot climate, dampness or overheating,
the bearings need to be checked and changed before this peri-
od.

5.2.1.2

Pump with grease lubricated bearings for
regreasing with grease nipples (special
execution)

The bearings are filled with grease in the factory before delivery
• Need to be re-greased with approx. 20 to 30 g per point every

six months.

•

Grade of grease:

Lithium-based grease according to DIN

51825, non-ageing, non-acidic, non-corroding, water-resist-
ant with a working temperature of -30 to +130°C, penetration
rate of 2 to 3, working penetration of 265 to 295 and a dripping
temperature of approx. 190°C.

• Recommended commercially-available grades of grease:

-UNIREX N2, (ESSO)
-OPTIMOL OLISTA LONGTIME or OLIT 2, (OPTIMOL)
-GLISSANTO 20, (DEA)
-ENERGREASE MSLS-EP2, (BP)

• Avoid over-greasing as this can lead to damages caused by

overheating.

• After regreasing several times or if overheating occurs (50°C

above ambient) open the bearing cover and remove surplus
or used grease.

• Do not pack new bearings more than half full with clean

grease.

5.2.2

Monitoring the pump during operation

For satisfactory operation carry out the following checks as rou-
tine:
• Monitor the smooth running of the pump. In case of unusual

strong vibrations immediately switch off the unit and check for
reason (impeller damage, foreign matters, clogging, etc.)

•

For pumps with gland packing rings

confirm the leakage

rate of the shaft seal as 5 to 10 l/hr. If gland sealing water is
supplied check the flow rate.

•

Pumps with mechanical seals:

If leakage occurs at shaft

clean, inspect and if necessary replace the mechanical seal.
A leakage of between 0.2 and 5 ml/h is possible depending
on running smoothness, pressure, rotational speed and shaft
diameter (mechanical seals are wearing parts for which no
guarantee can be given).

•

V-Belt driven pumps:

Check belt tension.

• Regularely check local readings, the best each working day,

and immediately react to any large deviations.

• At regular intervals, the best once a week, check all meas-

ured and recorded operating values and note down in a unit
casebook. Determine the maintenance interval on the basis
of the trend (data development).

•

Pressure gauge with three way cock:

Only open the three-

way cock in order to obtain a gauge reading and close it im-
mediately afterwards.

•

If pumping highly corrosive and/or abrasive media,

the

components containing pressure should be inspected regu-
larly to avoid unexpected failure. The interval between in-
spections should be short initially and may be extended as
experience is gained.

5.3

Disassembly and assembly instructions

Stripping and assembly should only be carried out by qual-
ified personnel and with reference to the relevant sectional
drawings (see para. 7.4). The stripping sequence will be
clear from the drawing.

Never run the pump with the suction and discharge
isolating valves closed or with the discharge valve
closed at non-return valve installed at suction side.
Under such conditions the pump contents will be
rapidly vaporised and very high pressures generat-
ed. These may exceed the bursting pressure of the
pump casing, creating a serious hazard to personnel
and property.

• Never work on the set until the electricity supply

has been disconnected completely. It must be im-
possible for the set to be started inadvertently.

• Always wear safety gloves when assembling/strip-

ping the pumps or when adjusting glands.

Nominal diameter

discharge branch

Sealing water required

[m³/h] at

p 0,5 bar

100

0.15

125 - 200