Richter MNKA-B Series (ASME) - Manual (Page 11)

Installation and Operating Manual
Series MNKA-B, acc. to ASME/ANSI
9250-055-en Revision 01
TM 5976 MPE/Wm Page 11 Edition 10/2004
5.5 Pipe fittings
The following pipe fittings are available from Richter
on request:
Shut-off valves
Check valves
Sight glasses
Priming vessels
Strainers
Pressure
gauges
Fig. 5
5.6 Monitoring facilities
Appropriate monitoring facilities are to be
recommended, depending on the
requirements placed on operational safety and
availability of the unit.
Richter provides information on request and can
supply:
Flow meters
Filling level indicators
Motor load monitors
Temperature monitors
Can monitors
Leak monitors
Pump control "Hydrovar" ®
Pump management "Pump Smart" ®
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
design point is specified in the data sheet and works
certificate. If the operating design point was not known
when the pump was dispatched, the power
consumption can be read off the appropriate
performance curves. The max. density, the max.
viscosity and a safety margin are to be allowed for.
Care must be taken when selecting the motor size to
ensure that the excess power is not too great. During
start-up the magnetic drive could otherwise stop.
The magnetic drive rating at the nominal speed of
3500 rpm is given in the pump data sheet.
If the motor power exceeds this rating, it is necessary
to check the stoppage of the magnetic drive.
The same also applies if the required drive rating
exceeds 80 % of the magnetic drive rating.
Consult ITT Richter if necessary.
Different operating data can be achieved without
changing the pump through the use of different
speeds, e.g. by means of a frequency converter.
The pump with base plate and motor is illustrated in
the installation drawing.
The operating manual of the motor manufacturer
must be observed.
A motor with a valid ATEX certificate is to be
used if employed in zone 1 and 2.
5.8 Electric connection
Only have the electric connection performed
by a qualified electrician. Compare the
available mains voltage with the information
on the type plate of the motor and select a suitable
circuit.
It is urgently recommended to use motor protection
facilities (motor protection switch).
In potentially explosive areas IEC 60079-14
must also be observed for the electrical
installation.
It must be ensured that the pump is grounded.
It must be ensured that the housing 100 is
grounded. This can be most easily achieved
by using tooth lock washers or contact discs if the
substructure itself is grounded.
Otherwise, grounding must be ensured by other
means, e.g. cable bridges.
Units supplied by Richter (pump and base plates) are
to be grounded using suitable devices on the base
plate.
If leakage is detected when pumping
hazardous fluids the trip switch must be set to
shut down the pump. In order to protect
against escape of fluids to atmosphere, the units
should be drained as soon as possible. Failure to
follow this instructions may result in property damage,
sever personal injury, or death.