Dry Running; Cavitation; Overheating; Pressure Surges - BADU Resort 30 Instructions D'utilisation Originales

2.9.2

Dry running

If run dry, mechanical seals and synthetic parts can be destroyed
within only a few seconds.
 Do not allow the pump to run dry. This also applies to
checking the rotation direction.
 Purge air from pump and suction line prior to start-up.
2.9.3

Cavitation

Pipes which are too long increase resistance. This results in risk
of cavitation.
 Ensure that the suction line does not leak.
 Observe the maximum pipe length.
 Only switch the pump on when the valve on the delivery side
is opened halfway.
 Open the valve on the suction side completely.
2.9.4

Overheating

The following factors can result in the pump overheating:
• Excessive pressure on the delivery side.
• Motor overload switch set incorrectly.
• Ambient temperature which is too high.
 Do not operate the pump with the valves closed, minimum
flow rate 10 % of Q
For pumps with a three-phase motor, install a built-in or

external overload switch and set it correctly.
 Do not exceed the permitted ambient temperature of 40 °C.
2.9.5

Pressure surges

Valves which close suddenly can cause pressure surges which far
exceed the maximum permissible housing pressure of the pump.
 Install shock absorber or air vessel.
Avoid valves which close suddenly or, if present, close them

slowly.
2.9.6

Blockages in the pump

Pieces of dirt in the suction line can clog and block the pump.
Do not operate the pump without a strainer basket or a

strainer basket handle.
 Check how easily the pump rotates before starting it up and
after longer idle or storage periods.
08|2018
.
max
Safety
EN 11