| Efficiency |
The allround precision
machining of the hub disk and shroud as well as the suction and
pressure side of the vanes, which are calculated for optimal
performance as well as optimal efficiency, leads to very smooth
surfaces. So the very low boundary layer friction in the flow channels
is one of the reasons for the high efficiencies of SlMSITE®
impellers.
The property of SlMSlTE®
to swell slightly in water has the following advantage: during the
operation the throttling gap widths between impeller and wear ring or
pump casing becomes smaller, which leads to
a reduction of the gap losses and which is a further reason for the
high efficiencies of SIMSITE® impellers.
|
Weight
|
SlMSlTE® is much
lighter than metallic materials: compared with bronze its weight is a
sixth only!
|
Service life of parts
|
The service life of SIMSITE® impellers and
wear rings is approximately four times that of bronze ones.
|
Resistance
|
High resistance to sea and brackish water
and chemicals as well as wear caused by cavitation influences are
exceptional properties of SIMSITE®
|
Galvanic corrosion
|
As SIMSITE® has no electric conductivity,
galvanic corrosion with its detrimental
consequences is excluded.
|
Unbalanced mass
|
The exceptional resistance to corrosion of
SlMSITE® avoids
corrosion and because of this there is no alteration of the impeller
geometry during operation. A continuous increase of the unbalanced
mass and its detrimental influences on shaft seal and bearing, which
can arise with metallic impellers, is excluded,
|
Bearing load and bearing
service life
|
The light weight of SIMSITE® impellers
reduces the bearing load caused by the impeller weight and leads in
this way to an increase of the bearing service life.
|
Shaft seal service life
|
Centrifugal pumps with SIMSITE®
impellers run quiet and with low vibrations. This and the lower shaft
deflection caused by the low impeller dead weight lead to an increase
of the shaft seal service life.
|
Noises and vibrations
|
The allround precision machining with its
high manufacturing accuracy and the extremely low remaining unbalanced
mass, together with the noise-damping properties of SIMSITE®,
lead to a very low noise level as well as a reduction of the
susceptibility to vibrations with their detrimental consequences.
|
Dry—running
|
Based on the chemical composition of this
structural composite and its self-lubricating property, SIMSITE®
impellers and wear rings allow
dry-running for a short time without the danger of damage.
|
Maintenance
of the operating
point
|
SIMSITE® impellers guarantee by their
exceptional resistance to corrosion and wear, compared with metallic
impellers, a reliable maintenance of the operating point. These
material properties are especially of big advantage in the case that
the pumps run in part or full cavitation because of, from point of
view of the hydraulic, bad arrangements of the suction pipe (which are
mostly not avoidable aboard) and even then over a long operating time
no remarkable cavitation wear may occur.
|
