6 Commissioning/Start-up/Shutdown
40 of 96
Sewatec
CAUTION
Abnormal noises, vibrations, temperatures or leakage
Damage to the pump!
▷ Switch off the pump (set) immediately.
▷ Eliminate the causes before returning the pump set to service.
ü The pump, suction line and discharge line have been vented and primed with the
fluid to be handled.
1. Fully open the shut-off element in the suction head/suction lift line.
2. Close/slightly open the shut-off element in the discharge line; fully open the
shut-off element if a check valve is installed.
3. Start up the motor.
4. Immediately after the pump has reached full rotational speed, swiftly open the
shut-off element in the discharge line and adjust it to comply with the duty
point.
5. On pump sets with gland packing, check the leakage at the gland packing and
re-adjust it, if required. (ðSection7.5.8.2,Page71)
Frequency inverter
When the pump is started up via frequency inverter, ensure short start ramps
(approximately 3-5 s).
NOTE
Speed controlled operation shall only start after approximately 3 to 5 minutes.
Pump start-up with long start ramps and low frequency may cause clogging.
6.2 Operating limits
DANGER
Non-compliance with operating limits for pressure, temperature, fluid handled and
speed
Explosion hazard!
Hot or toxic fluid could escape!
▷ Comply with the operating data indicated in the data sheet.
▷ Never use the pump for handling fluids it is not designed for.
▷ Avoid prolonged operation against a closed shut-off element.
▷ Never operate the pump at temperatures, pressures or rotational speeds
exceeding those specified in the data sheet or on the name plate unless the
written consent of the manufacturer has been obtained.
6.2.1 Maximum operating pressure
CAUTION
Permissible operating pressure exceeded
Damage to connections and seals!
▷ Never exceed the operating pressure specified in the data sheet.
Table15: Maximum operating pressure [bar]
Size Maximum operating pressure
080 - 315 10
080 - 317 10
100 - 315 10
To Next Page
Loading...
