En
gl
is
h (
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24
7.2 Long-term shutdown
For long shutdown periods or to isolate the pump for
maintenance, close the inlet and outlet valves. If no
inlet valve is fitted and the pump has positive inlet
height, drain all liquid from the inlet pipe to terminate
the liquid flow into the pump inlet port. If applicable,
turn off any external source of cooling or lubricating
liquid to the stuffing boxes or shaft seals. Remove
the plugs in the pump drain and vent tappings, as
required, and drain all liquid from the pump casing.
Remove the stuffing box glands and packing rings, if
applicable.
Fig. 22
Example of drain plugs
1. After draining the pump during long shutdown
periods under freezing conditions, blow out all
liquid in passages and air pockets using
compressed air. You can prevent freezing of
pumped liquid by filling the pump with antifreeze
solution.
2. Rotate the shaft by hand monthly to coat the
bearings with lubricant and delay oxidation and
corrosion.
3. Where applicable, follow the motor
manufacturer's storage recommendations.
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that the escaping water does
not cause injury to persons or damage
to the motor or other components.
- In hot-water installations, pay special
attention to the risk of injury caused by
scalding hot water.
- In cold-liquid installations, pay special
attention to the risk of injury caused by
cold liquids and cold surfaces.
TM
04
037
8
060
8
Drain plug, inlet port
Drain plug, pump casing
and outlet port
WARNING
Harm to health
Death or serious personal injury
- Do not use antifreeze solution if you use
the pump for public or potable-water
supply.
Do not tighten the vent screw or refit the
drain plug until the pump is to be used
again.
