18
QIS SERIES-M
03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES
Centrifugal Pump
5b.
Check turning by hand the impeller it does not rubs against the casing. The assembly may
turn easily without restriction. If there is any sound or sensation of rubbing, you need to check the
whole assembly, disassembly and repeat it again. If everything is fine, to complete the assembly
place and fix the protective guard (
16
) with a hexagonal screw (
17
) onto the adapter.
It is highly recommended for safety reasons not to operate the equipment if it is not placed in the
adapter. Figure
Q
.
Figure
Q
5c.
Your assembly is complete. Figure
R
.
Figure
R
Notes:
1.
Before starting the pump check that the motor turns in a counterclockwise direction.
2.
Keep the suction line flooded and the mechanical seal lubricated with the fluid which is
going to be pumped. Never operate the pump when dry or it may damage the seal.
3.
Every double mechanical seal must be lubricated with no exception.
4.
Maintain enough NPSH available in the suction line to avoid the pump to cavitate.
5.
Do not support the weight of the pipe on the pump casing, the pipe must be adequately
supported to avoid this.
17
16
AS
S
E
MBL
Y
