Richter SCK-S - Manual (Page 8)

Series MNK-S, MNK-SB, SCK-S, “Self-priming“ design Page 8
9230-062-en Revision 02
TM 6566 Edition 08/2006
A check must be made to determine whether the suc-
tion flange, discharge flange and emptying flange are
tightened; the Richter information on screw tightening
torques in the operating manuals which also apply is
to be observed.
5.1.2 Checking the direction of rotation
With the pump filled, the direction of rotation of the
motor is to be checked with a rotary field instrument. If
no such instrument is available, switch the motor on
briefly and off again so that it does not run up. While
doing so, observe the direction of rotation of the fan
through the fan hood.
The direction of rotation arrow attached to the pump
housing indicates the admissible direction of rotation
of the pump.
5.1.3 Start-up
Any shut-off valve on the suction side is to be
opened.
The recommended shut-off valve on the discharge
side is to be closed.
Now the motor can be switched on and then the
shut-off valve on the discharge side opened, de-
pending on the flow rate required.
5.2 Shutdown
Close the discharge valve completely.
Switch off the motor.
Only close the suction line if the pump is to be
emptied or dismantled.
If work is to be carried out on the machine or it is to be
dismantled, make sure that the motor cannot be
switched on again inadvertently.
If the pump is to be emptied or flushed, the
local regulations must be observed. If the
pump is to be sent to your own workshops or
returned to the manufacturer, it must be
cleaned particularly thoroughly.
See also Section 3.4 in the installation and operating
manual of the respective series.
5.3 Restarting
When the pump is being restarted, care must be
taken to ensure that all the appropriate steps as de-
scribed in Section 5.1 are repeated, depending on
the progress of shutdown.
5.4 Improper operation s and their
consequences
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 opera-
tion; their occurrence can only be prevented by ad-
hering to the intended use.
Refer to the relevant operating manual MNK-B, MNK
or SCK, depending on the design selected.
Pump is started up without medium:
• Magnetic drive pump: The plain bearings in the
pump may be destroyed.
• Mechanical seal pump: The mechanical seal can
be destroyed after just a few revolutions.
Suction line not opened or not opened fully:
• Pump suffers cavitation, the result is 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.
Discharge valve opened fully:
• Pump can cavitate. Particularly severe with an
empty discharge line.
• Risk of pressure surge.
• Mechanical seal pump: Risk of excessive shaft
deflection with consequences for the mechanical
seal.
• Motor may be overloaded.
Suction valve and discharge valve closed:
• Destruction through rapid overheating and sharp
rise in pressure possible.
Control of the pump with suction valve:
• Risk of cavitation. The flow rate is only to be
regulated on the discharge side.
Overrun of the admissible gas content:
The flow may stop.
Switch pump and vent off for renewed convey-
ance.
Make sure that the gas content is not exceeded,
as described in the intended use.