KSB Sewatec - Pump Shutdown Procedures; Returning Pump to Service

6 Commissioning/Start-up/Shutdown
43 of 96
Sewatec
The pump (set) remains installed
ü Sufficient fluid is supplied for the operation check run of the pump.
1. For prolonged shutdown periods, start up the pump (set) regularly between
once a month and once every three months for approximately five minutes.
ð This will prevent the formation of deposits within the pump and the pump
intake area.
The pump (set) is removed from the pipe and stored
ü The pump has been properly drained. (ðSection7.3,Page51)
ü The safety instructions for dismantling the pump have been observed.
(ðSection7.4.1,Page51)
1. Spray-coat the inside wall of the pump casing and, in particular, the impeller
clearance areas with a preservative.
2. Spray the preservative through the suction nozzle and discharge nozzle.
It is advisable to then close the pump nozzles (e.g. with plastic caps).
3. Oil or grease all exposed machined parts and surfaces of the pump (with
silicone-free oil and grease, food-approved if required) to protect them against
corrosion.
Observe the additional instructions on preservation.
6.3.1 Shutdown
1. Close the shut-off element in the discharge line.
If the discharge line is equipped with a check valve, the shut-off element may
remain open as long as there is back pressure.
2. Switch off the motor, making sure that the unit runs down smoothly to a
standstill.
Prolonged shutdown
periods
For prolonged shutdown, close the shut-off element in the suction line.
Danger of frost/freezing
If there is any danger of frost/freezing, drain the pump and protect it against
freezing.
6.4 Returning to service
For returning the equipment to service, observe the sections on commissioning/start-
up (ðSection6.1,Page39) and the operating limits (ðSection6.2,Page40) .
In addition, carry out all servicing/maintenance operations before returning the
pump (set) to service. (ðSection7,Page44)
WARNING
Failure to re-install or re-activate protective devices
Risk of injury from moving parts or escaping fluid!
▷ As soon as the work is completed, re-install and re-activate any safety-relevant
devices and protective devices.
NOTE
On pumps/pump sets older than 5 years we recommend replacing all elastomer
seals.