Preventing Material Damage; Leakage And Pipe Breakage; Dry Running; Pressure Surges - Speck-Pumpen SG Serie Originalbetriebsanleitung

Safety
Seized pump
If a pump seizes, and is switched on several times repeatedly, the
motor can be damaged. Observe the following points:
 Do not switch the pump/unit on repeatedly.
 Turn the motor shaft by hand. See point 6.1.2 on page 19.
Clean pump.

2.9

Preventing material damage

2.9.1

Leakage and pipe breakage

If the pipe forces are exceeded, leaks can occur at the screwed
connection or the pump itself.
 Do not use the pump as a fixed point for the pipe line.
 Connect pipes free of load and mount them elastically. Install
compensators if necessary.
 If the pump leaks, the unit may not be operated and must be
disconnected from the mains power supply.
2.9.2

Dry running

Various components can be damaged within seconds due to dry
running.
 Do not allow the pump to run dry.
Purge air from pump 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.
Open the valves completely.

2.9.4 Overheating
The following factors can lead to the pump overheating:
• Insufficient cooling of the pump.
• Closed valve in the pressure line.
 Do not let the pump run dry.
 Do not operate the pump with closed valves.
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.
10 EN 07|2020