GENERAL
TECHNICAL CHARACTERISTICS OF THE MANZINI SUPERBA ELECTRIC PISTON
PUMPS (ref. ct/43)
- the MANZINI SUPERBA range of pumps is designed for the transfer
of liquids as different as wines, vinegars, fruit juices and
pulps (including citrus fruits), de-stalked grapes, must, dregs,
oil, sludges, and dense liquids in general even containing suspended
bodies (see the high pressure pumps catalogue for purification
sludge transfer), liqueurs, and industrial and drinking alcohol
requiring flame-proof motors etc. ;
- SUPERBA pumps are self priming to heights of 9.3 metres
below pump level and have maximum operating pressures of up
to 3.5 atm.. Unlike many other types of pump, MANZINI piston
pumps can run dry without any problems;
- MANZINI pumps are manufactured using thick castings for
extra strength, reliability, and a longer working life;
- MANZINI pumps feature an ample end of stroke gap to ensure
that solid foreign bodies (bottom of tank dregs, pieces of
wood or metal, small stones, or tools accidentally sucked
in do not cause serious damage to the piston and connecting rod
or drive gear;
- the dimensions of MANZINI pump bodies are carefully designed
to give a lower number of piston strokes for the same delivery
than with alternative pumps. This makes these pumps particularly
gentle on the product. Extra slow speed electric pumps (down
to 15-30 strokes/minute or to order) can also be provided on
request. These give an even flow with performance similar
to screw pumps with rubber stator or lobe pumps while still maintaining
the traditional advantages of piston pumps, including a lower
operating speed than virtually any other type of pump, causing
less damage to the product and avoiding product heating. These
pumps also offer trouble-free dry running (unlike screw pumps
with rubber stator), trouble-free transfer of liquids containing
solid bodies in suspension, excellent self-priming characteristics,
maximum versatility, minimum maintenance, and a long working
life;
- MANZINI SUPERBA pumps are designed for maximum interchangeability
of components subject to wear, and for simple servicing;
- the SUPERBA pumps are available in standard, stainless steel
and bronze version (see below) and with pump bodies manufactured
entirely from stainless steel (see catalogue). The fully stainless
steel versions can be fitted with an optional throttle inverter
for use with liquids containing large solid bodies in suspension.
This replaces the ball inverter and by-pass fitted as standard
(a patented MANZINI exclusive). This device enables pump delivery
to be reduced until the lines become completely closed;
- stainless steel and bronze versions are fitted with interchangeable
polished cylinder sleeves (4 mm in thickness), connecting rods,
piston, valve guides, air chambers, cylinder ends, and other
parts in stainless steel to eliminate the problem of metal
transfer to pumped liquids. All mechanical moving parts subject
to any form of friction or to compression are in stainless steel.
Metal transfer can in any case be completely eliminated by the
simple expedient of never leaving liquids standing in the pump
for hours and by washing the pump out at the end of each working
day. This prevents active liquids from remaining in contact with
bronze components for extended periods of time. The use of
stainless steel for those parts subject to friction or compression
not only eliminates the risk of metal transfer during transfer
of wine, but also ensures a longer working life for the pump;
- the electrical system comes complete with a 24 V CEI standard
transformer. Special electrical systems can be fitted
to order. This electrical system is designed So that the two
pump speeds are controlled by completely independent circuits,
both protected against voltage peaks and over-current caused
by mechanical overload, which could otherwise damage the motor.
If one of the two circuits develops a fault (e.g. a coil fault),
the other circuit continues to work perfectly so that the day's
work can be completed using the second speed before repairs have
to be carried out; An exceptionally reliable and compact radio
control can also be fitted to enable the pump to be switched
on and off and for speed changes to be made at a distance;
- please refer to the specifications table for details on individual
models.
Technical Office 
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