Series MNKA bearing pedestal assembly 4
Page 12
9250-003-en
Revision 01
TM 10458
Published 06/2022
5.4.6 Ventilation and drainage
Venting may be directed into the discharge line or
upstream of the discharge valve.
A vent line can also be a bypass, evacuation or
flushing line.
The pump housing is equipped with a drain port
as standard. Optionally, the drain bore can be
drilled out.
Figure 4
5.5 Pipeline fittings
The following pipeline fittings are available on re-
quest at Richter:
♦
Backflow preventer
♦
Shut-off devices
♦
Sight glasses
♦
Inlet tank
♦
Dirt traps
♦
Manometer
Figure 5
5.6 Monitoring devices
Depending on the requirements for
operational safety and availability of
the unit, appropriate monitoring equip-
ment is recommended.
Richter will provide information about and supply
the following on request:
♦
Flow meter
♦
Fill level indicator
♦
Motor load monitor
♦
Temperature monitoring
♦
Rolling bearing monitoring
♦
Can monitoring
♦
Leakage monitoring
♦
SAFERUN
®
pump condition monitoring
On request we will provide you with the
publications “Safe operation of centrifugal pumps”
(Sichere Betriebsweise von Kreiselpumpen) and
“Centrifugal pump operation without NSPH
problems” (Der Kreiselpumpenbetrieb ohne
NSPH-Probleme).
5.7 Drive
The power consumption of the pump at the oper-
ating point is specified in the data sheet or factory
certificate. If the operating point is not known when
the pump is delivered, the power requirement can
be taken from the corresponding characteristic
curves. The maximum density, maximum viscosity
and a safety margin must be taken into account.
When selecting the motor size, make sure that the
power surplus is not too large, but that the require-
ments according to ANSI/HI or ISO 5199 are met.
Otherwise, the magnetic coupling could break off
during startup.
The pump data sheet specifies the magnetic cou-
pling power at the required pump speed.
If the motor power exceeds this magnetic coupling
power
—
at pump speed
—
a check for magnetic
coupling breakage is required.
Likewise, if the required drive power exceeds 80%
of the magnetic coupling power at pump speed. If
necessary, consult Richter.
By using different speeds, e.g. by means of a fre-
quency converter, different operating data can be
achieved without changing the pump.
The pump with base plate and motor is shown in
the installation plan.
The motor manufacturer’s operating instructions
are to be observed.
If the pump is started directly, i.e. without speed
control by a frequency converter, we recommend
using a soft start in order to prevent magnetic
coupling breakage
.
When used in zone 1 and 2, a motor
with valid ATEX approval must be
used.
Discharge line
Ventilation
Drainage
Suction and
supply line
