Richter MNKA-B Series (ASME) - Manual (Page 4)

Installation and Operating Manual
Series MNKA-B, acc. to ASME/ANSI
9250-055-en Revision 01
TM 5976 MPE/Wm Page 4 Edition 10/2004
Sizes :
Group 1 Group 2
1.5“ x 1“ x 6“ 3“ x 1.5“ x 8“
3“ x 2“ x 6“ 2“ x 1“ x 10“
1.5“ x 1“ x 8“
1.1 Intended use
ITT Richter pumps of the series MNKA-B (ASME) are
sealless, plastic-lined magnetic drive centrifugal
pumps for the leak-free conveyance of aggressive,
toxic, pure and inflammable liquids.
The pump is equipped with a permanent magnetic
synchronous drive.
For vertical installation of the pumps, please consult
the manufacturer.
The observance of the specified physical
limits is important for perfect functioning and
safe operation, especially with regard to
explosion protection to prevent potential sources of
ignition (see Section 2.5):
It must be ensured that the pump is always filled
with liquid during operation.
For safe pump operation, we recommend a flow
rate which lies between 0.3 and 1.1 Q
opt
. The
maximum operating temperature must never be
exceeded. See Section 2.5.7. In case of doubt,
you must consult the manufacturer.
The manufacturer must be consulted in the event
of entrainment of gas >2% as well as solids in
order to avoid a lack of lubrication and dry-running.
The plant NPSH value (NPSHA) should be 0.5 m
higher than the NPSH value of the pump
(NPSHR). See also Section 5.4.1..
Inadmissible modes of operation, even for a
short period, may 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 operation;
their occurrence can only be prevented by adhering to
the intended use.
Furthermore, reference is made in this connection to
the European Directive 95/C332/06 (ATEX
118a)
which contains the minimum regulations for improving
the occupational health and safety of the workers who
may be at risk from an explosive atmosphere.
This unit must not be operated above the
values specified in the data sheet as regards
the fluid to be conveyed, flow rate, speed,
density, delivery head and operating temperature as
well as the motor rating.
The instructions contained in the operating
manual or contract documentation must be
observed; if necessary consult the manufacturer.
All important features are documented in the data
sheet included in the scope of delivery.
In the event of operating conditions other than those
described in the data sheet, the following are to be
checked again:
design of the pump
design of the accessories
suitability of the materials.
1.2 Tightening torques
Screws greased, tighten in diametrically opposite
sequence
Housing screws 901/3
Size
[inch]
No. x size
ASME
Nm in-lbs
1.5“ x 1“ x 6“ 8 x ½“ 35 310
3“ x 2“ x 6“ 8 x ½“ 35 310
1.5“ x 1“ x 8“ 10 x ½“ 35 310
3“ x 1.5“ x 8“ 12 x ½“ 30 265
2“ x 1“ x 10“ 12 x 5/8 “ 45 400
Pipe screws, flanges to ASME
DN
[inch]
No. x size
ASME
Nm in-lbs
1“ 4 x ½“ 12 105
1½“ 4 x ½“ 20 135
2“ 4 x 5/8 “ 35 220
3“ 4 x 5/8 “ 40 355
1.3 Name plate, dry-running, CE
and housing (casing)
markings
The stainless steel name plate is firmly riveted to the
housing (casing):
If the operator attaches his identification, it must be
ensured that the pump matches the application in
question.
Example of name plate: