Lifting Sketches; Intended Use; Description; Type Key - Wilo MMI50V Instrucciones De Instalación Y Funcionamiento

3.4.1

LIFTING SKETCHES

4

INTENDED USE

MMI50 different variants are used to handle clear or slightly turbid fluids
with a small containt of soft non abrasive particles.
Its cast SS 316L multistage hydraulic, with open or closed impellers and
its modular design permits to achieve industrial pumping requirements.
Many sealing possibilities are available to ensure proper sealing of acids,
chlorides, alkaline products, solvents, leachate, toxic fluids...
MMI50 are used in every kind of industries, chemical, pharmaceutical,
food and beverage, waste treatment plants ...
5

DESCRIPTION

5.1 TYPE KEY

Pump description is engraved on pump name plate. It gives a
general description of pump design. The nameplate is attached to pump
base plate.
Description of MMI50V pump is created as follow:
Example : MMI50-3 F VTMRI 5,5/2 A=2500 -X
MMI50V Pump product line
3 Number of stages
H Type of impeller
F =closed impeller / O = Open impeller
VTMRI Variant of motor assembly :
VCS = rigid coupling / VTM = Ball bearing bracket with
semi elastic coupling / VTMRI = Ball bearing bracket with
semi elastic coupling and integrated discharge
5,5 Motor Nominal power P
2 Number of pole : 2 / 4
A=2500 Length dimension
X Specificity

5.2 TECHNICAL CHARACTERISTICS

5.2.1

MATERIALS

MATERIAL
- Casing : stainless steel (AISI 316)
- Shaft : steel (Z20C13 - AISI 420) or stainless steel (AISI 316L)
- Impeller : Cast iron (EN-GJL250) or stainless steel (AISI 316) or
bronze (G-CuSn10)
- Bearing : bronze, PEEK, Graphalloy® or silicon carbide
- Column : steel or stainless steel (AISI 316L) fabricated steel
construction.
GASKETS
- Casing seal : PTFE gasket.
5.2.2

OPERATING LIMITS

5.2.2.1 TEMPERATURE
All variants : from -5°C to +120°C (depending on available NPSH)
5.2.2.2 PRESSURE
All variants : PS = 16 bar
5.2.2.3 FLOW RANGE FOR CON TI NUOU S OPERATION
3
Flow > 3 m /h
When the pump is used in an ATEX atmosphere, it is necessary to
measure the working point and check that bearing bracket surface
temperature remains below permitted temperature. It is user's
responsibility to check that all bearings are lubricated when pump starts.
5.2.2.4 MAXIMUM ALLOWABLE SP EED AND NUMBER OF
STARTS PER HOUR
MAXIMUM SPEED:
3600 RPM
NUMBER OF STARTS PER HOUR :
Wait for pump full stop before starting up the pump again to avoid
damaging the motor and the pump.
Staring frequency depends on motor type. Ask manufacturer if
necessary.
A maximum of 15 starts per hour is recommended. Authorized number
of starts per hour will depend on conditions of site and motor type.
ENGLISH
[KW]
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