High Pressure Pumps Series SIHImulti MSC, 250 m³/h, 1000 m, 180 °C0 pages

Modular multistage pumps

SIHImulti
Type MSC

Description
multi

The SIHI
MSC range of horizontal, ring-section multistage pumps have been designed for long-term reliability
when pumping high pressure liquids. The design features
within this range of high pressure pumps, provide our customers with unique solutions to long-term concerns about
power consumption, efficiency, and reliability.
A special feature is the wide range of speed, which is excellent suitable for frequency inverter running.
Meeting the technical requirements of ISO 5199 / EN25199,
they have a modular concept in order to reduce the number
of parts, and consequently our customers’ inventory.
Premium levels of efficiency are available by selecting an
appropriate set of impellers and diffusers that give an ideal
fit to the process requirement. Unique to the multi-stage
arena portfolio is the, SIHI, patented self-adjusting drum
style of axial thrust balancing. The MSC employ a device
that reduces the bypass flow to an absolute minimum, while
not being susceptible to long(er) term wear-sensitive clearances.

Construction

Applications
multi

Pumps of the SIHI
range meet the specific requirements
of our customers in selected applications, such as
• Renewable energy
• Fossil power stations
• Biomass
• Geothermal
• Paper and Pulp

Optional special designs
Customised solutions, which are not covered by the standard design, like de-staging decive, interstage bleed-off or
different sealing options are possible on request.

Materials
Suction-, Stage- and
Discharge casing:
Impeller/Diffuser:
Shaft:

Chrome steel
Grey cast iron or stainless steel
Chrome steel

Technical Data
Flow rate:
Head:
Medium temperature:
Speed:
Final pressure:
Shaft sealing
Direction of rotation

max. 250 m³/h
max. 1000 m
-10° to +180°C
C
400 to 3600 rpm
max. 100 bar
packed gland or
mechanical seal
counter-clockwise, when viewed
from discharge side

Different hydraulic impeller and diffuser sizes can be installed in a standard casing, thus enabling the pump to be
designed exactly for the duty point required. The first stage
of each pump size is equipped with an optimised NPSH
suction impeller.
Axial thrust is hydraulically balanced by a patented balance
drum system with a self-adjusting throttling device. Residual
thrust is absorbed by a generously sized angular-contact
ball bearing. The balancing line is returned to the suction
casing.
The pump rotor is supported on the drive side by grease
lubricated anti-friction bearings. Support on the suction side
is effected by means of a low-velocity product lubricated,
and self-aligning sleeve bearing.
The pump is driven from the discharge side, in a counterclockwise direction, when viewed from the discharge side.
Simple installation adaptation is possible with the modular
design which allows discharge casing flange to be supplied
radially upwards, horizontal-left or horizontal-right. The
pump is usually constructed with an axial or radial inlet suction.
As standard the pump is mounted with integrated thermal
compensation.
The shaft sealing consist of a single-acting mechanical seal,
or optionally as packed gland configuration. These two executions are supported with an internal circulation flow.
For even higher liquid temperatures, the pumps can be
supplied with an optional external jacket-cooling.
The static casing sealing, consist of EPDM O-rings, as
standard, with the option of FKM material.
Condition-based monitoring, via the SIHIdetect type of vibration device, is optional in which to give advanced failure
warning. Other standard equipment is available to monitor:
Suction and discharge pressure; Liquid temperature; and
bearing temperature. Low pressure-drop, filters can be supplied for use of the suction side of the pump, as can minimum flow-bypass valves.

PUMP TECHNOLOGY SIHI
133.23304.53.01 E

multi

MSC
09/2012