Goulds Pumps ICM - IOM - Manual (Page 23)

Installation and Operating Instructions
Model ICM/ICMP, for life grease lubrication
9330-050-en Revision 05
TM 5409 MPE/Re/Wm Page 15 Date 03/2003
6.3 Shutdown
¾ Close discharge valve down to the position "mini-
mum flow rate"
¾ Switch motor off.
¾ Close discharge valve completely.
Only close the suction line if the pump is to be evacu-
ated or dismantled.
For all work on the machine, make sure that
the motor cannot be inadvertently switched
on.
If the pump is to be evacuated or flushed,
observe the local regulations.
It is recommended to wait one hour before the pump
is dismantled from the plant to permit static peak
charges to be eliminated.
If the pump is returned to the manufacturer's, clean
the pump very thoroughly.
See also Section 3.1.
6.4 Restarting
When the pump is restarted, it must be ensured that
all the relative steps as described in Section 6.1 are
repeated, depending on the progress of the shutdown
operation.
6.5 Inadmissible modes of opera-
tions and their consequences
(examples)
Inadmissible modes of operation, even for a
short time, can result in serious damage to the
unit.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks) may
result from these inadmissible modes of operation;
their occurrence can only be prevented by adhering to
the intended use.
Pump is started up without medium :
♦ The plain bearings in the pump may be destroyed.
♦ Other pump components may be destroyed due to
overheating.
Suction line not opened or not opened fully :
♦ Pump suffers cavitation – material damage.
♦ Pump does not achieve the necessary head or
flow rate.
♦ Pump may be destroyed due to overheating.
Discharge valve closed too much :
♦ Pump may be destroyed due to overheating.
♦ Axial thrust too great.
Discharge valve opened too much :
♦ Pump can cavitate. Particularly severe with an
empty discharge line.
♦ Risk of pressure surge.
♦ Possible damage to the plain bearings.
♦ Magnetic drive may stop.
♦ Motor may be overloaded.
Suction valve and discharge valve closed :
♦ Destruction due to rapid overheating and sharp
rise in pressure.
Control of the pump with the suction valve :
♦ Cavitation – the flow is only to be regulated on the
discharge side.
Operation with magnetic drive stopped :
♦ If no heat is dissipated, damage to the inner and
drive magnet assemblies may occur.