Seepex BN 5-12 Series, Operation & Maintenance Manual

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9
Constant conveying capacities
Due to a smaller rotor diameter, the seepex 6L geometry
results in surface velocities, which are lower than the single
helix conventional geometry by about 20 %, when operating
at the same pump speed. This results in a significant extension
to the service life of the rotor and stator. Due to the longer
sealing line, the pressure and the conveying capacity can be
kept constant over longer periods of time, even when wear
and tear has reached an advanced stage.
Lower axial forces
With a reduced rotor diameter and smaller eccentricity, the
6L geometry has a smaller cross-sectional surface compared to
the conventional geometry. As a consequence, the axial forces
working on the joints and bearing are around 50 % less. The
axial loads on the Tricam geometries are between those of the
6L and the standard geometries.
Low pulsation flow characteristic
Compared to the conventional geometry, the elongated form
of the 6L rotor and stator and the resulting smaller radius of
rotation have positive effect on turbulence, pulsation, shear
and vibration. Because the Tricam geometry has a higher
number of created cavities than the 6L geometry, the flow
overlap increases from two to three displaced cavities per
revolution. This reduces the pulsation with the Tricam geometry
even more.
Key advantages
•
The right geometry for every application
•
Optimum performance, resulting in lower operating
costs and a fast return on investment costs
•
Long service life of pump, cost savings on spare parts
•
Thanks to the modular system all geometries are
interchangeable
6L geometry, single stage
Conventional geometry, multi-stage
6L geometry, single stage
Conventional geometry, multi-stage
6L geometry, single stage
Conventional geometry, multi-stage
Tricam geometry (-6LT), single stage
Tricam geometry (T), multi-stage
sealing line 6L geometry
sealing line conventional geometry,
single stage