adapted for the medium to be conveyed
and was thoroughly tested to verify its
suitability for the application. The lecithin
molasses made gentle feeding into the
mixing process absolutely necessary
in order to guarantee uniform product
quality. In addition, the high viscosity of
the molasses and the associated shear
stress had to be taken into account when
the pump was selected and dimensioned.
In view of all the components, LEWA
recommended using a Pomac PLP2-2.5
with bi-wing rotors. Type PLP2-2.5 is
designed so that it is possible to have
a delivery rate of 36 l / 100 revolutions
at a maximum speed of 1000 rpm,
which satisfies the quality requirements
particularly with respect to conveying the
molasses in a way that does not harm
the product. “The prevailing pressure
of 2-5 bar during this process was not
particularly challenging for the PLP
2-2.5, because the pump is designed for
a pressure of up to 15 bar,” Woldering
adds. “From our side, the pump was
also equipped with a gear motor with an
integrated frequency inverter and then
delivered to Hansa Industrie-Mixer for
further processing.”
Customer-specific control device and
scale
The special requirements of Terheggen &
Dethlefsen also necessitated additional
features. “A mobile metering system
was required that automatically admixes
certain quantities of the medium being
conveyed in accordance with the control
signals of a scale,” Woldering explains.
LEWA delivered the pump, including
the frame and cart, and brought Hansa to enable the selection of manual or
Industrie-Mixer GmbH & Co. KG on automatic mode.
board. Hansa Industrie-Mixer has many
years of experience in the food industry
and was responsible for designing the
control system, manufacturing a suitable
stainless-steel control cabinet and
implementing suitable components such
as hoses and check valves. The separate
control system was necessary to ensure
A high-precision scale adapted
specifically for this application was used
for metering; it was connected to the
control system and then to the pump.
Based on the extremely positive
assessment of the project so far, both
LEWA and Hansa see new cooperation as
accurate metering in accordance with entirely possible in the future.
the recipe and to make sure the mixing For more information, visit:
process runs smoothly in automatic
mode. A switch was also integrated
www.lewa.com and
www.hansamixer.de
FDPP - www.fdpp.co.uk 7