Series MNK pedestal group 4
Page
12
9230-003-en
Revision 19
TM 10458
Edition 06/2022
5.4.6 Venting and evacuating
Venting can take place into the discharge line or up-
stream of the discharge valve.
A venting line can also be used as a bypass, drain or
flushing line.
The pump housing is fitted with a drain connection as
a standard feature. Optionally, the drain bore can be
drilled.
Fig. 4
5.5 Pipe fittings
The following pipe fittings are available from Richter on
request:
♦
Check valves
♦
Shut-off valves
♦
Sight glasses
♦
Priming vessels
♦
Strainers
♦
Pressure gauges
picture 5
5.6
Monitoring facilities
Appropriate monitoring facilities are to be
recommended, depending on the require-
ments placed on operational safety and
availability of the unit.
Richter provides information on request and can sup-
ply:
♦
Flow meters
♦
Filling level indicators
♦
Motor load monitors
♦
Temperature monitors
♦
Rolling bearing monitors
♦
Can monitors
♦
Leak monitors
♦
SAFERUN® Condition Monitoring System
You can obtain the publications "Safe Operation of
Magnetic Drive Pumps" and "The Operation of
Centrifugal Pumps without NPSH Problems" on
request.
5.7 Drive
The power consumption of the pump at the operating
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 ISO 5199 are met. Otherwise, the
magnetic coupling could break off during startup.
The pump data sheet specifies the magnetic coupling
power at the required pump speed.
If the motor power exceeds this magnetic coupling
power
—
at pump speed
—
a check for magnetic cou-
pling breakage is required.
Likewise, if the required drive power exceeds 80% of
the magnetic coupling power at pump speed. If neces-
sary, consult Richter.
By using different speeds, e.g. by means of a frequency
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 con-
trol by a frequency converter, we recommend using a
soft start in order to prevent magnetic coupling break-
age
.
When used in zone 1 and 2, a motor with
valid ATEX approval must be used.
