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2 DESCRIPTION AND GENERAL DATA
PAGE
2.0
Date Name Signed Revision: 2
issued 03.08.98 Mangel Substitute for issue
approved 04.08.98 Hantschk of 18.03.94
released 05.08.98 Hantschk
text no. 30100
copy to: 95
2 Description
The NEMO
®
pump is a progressing cavity
pump.
The main components which determine the
system discovered by Professor René Moineau
are a rotating part, called the rotor and a sta-
tic part, called the stator.
The rotor is a helical screw with an extreme-
ly large pitch, large thread depth and small
centre diameter with round cross-section for
1/2-geometry and elliptical cross-section for
2/3-geometry. The stator has a two start or
resp. 3 start thread and is double or resp. 1.5
the pitch length of the rotor. This provides
space for the medium between the rotor and
stator. When the rotor turns round inside the
stator the medium moves continuously from
the inlet to the outlet.
The universal NEMO
®
pump system unifies
many positive characteristics of other pump
types:
■ Like centrifugal pumps NEMO
®
pumps
have no suction or pressure valves, but do
have a stable flow rate in proportion to the
number of revolutions.
■ Like piston pumps NEMO
®
pumps have a
suction capability of up to 8.5 m vacuum
metric.
■ Like membrane and peristaltic pumps the
NEMO
®
pump can transport every type of
inhomogenous, gaseous and abrasive media,
as well as those that are not of a liquid con-
sistency or contain solids and/or fibrous mate-
rial.
■ Like gear pumps and screw pumps the
NEMO
®
pump is capable of coping with high
medium viscosities.
■ Like piston, membrane, gear or screw
pumps the NEMO
®
pump can perform dosing
operations.
Length and cross-sections through the rotor
and stator with 1/2-geometry during a
rotation.
0°/360°
90°
180°
270°
Rotor-
Stellun
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