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1. TAIFUN®
from idea to product
WERNERT - PUMPEN GMBH

2. Until now: two drivers for
seal-less centrifugal pumps
• magnetic coupling
• asynchronous canned motor

3. Magnetic coupling - advantages
• no energy losses due to synchronous*
driving principle when using non-
metallic isolation shells.
• larger radial gaps don’t increase energy
loss, lead only to necessity of stronger
magnets.
• design of non-metallic pumps possible.
*outer and inner rotor show same speed

4. Magnetic coupling - disadvantages
broken
isolation shell:
fluid
contaminates atmosphere
= simple safety.
wasteful:
- 4 roller bearings
- 1 asynchronous driver
- 1 synchronous driver
Space
requirement.

5. Canned motor pump - advantages
broken
isolation shell:
fluid remains in the
outer safety barrier
compact
economical:
- 1 asynchronous
driver

6. Canned motor pump - disadvantages
• energy losses due to asynchronous*
driving principle ( eddy currents! )
• larger radial gaps ( required for SiC or
PFA ) lead to higher energy losses =
less efficiency.
• Heating up of the rotor does not allow
using thermoplastics like PFA.
• Fluid is heated up.
*outer and inner rotor do not show same speed = slip

7. Forget this...
The way to TAIFUN
.... and the second
skin for
improved safety.
Coils around the
isolation shell...
Wow, that’s
a lot of stuff....and this.

8. TAIFUN - the idea
The outer coils
produce a rotating
magnetic field for
the inner rotor,
which behaves like
it would do in a
magnetic coupled
pump.
Designing non-
metallic canned
motor pumps
becomes possible.

9. Excursus: electric coils
Coils, which are
passed by electric
current, will
generate a
magnetic field.
Alternating current
will generate an
alternating
magnetic field.

10. Excursus: rotating magnetic field

11. Driving scheme TAIFUN
3 groups of coils:
black,
yellow,
green.
All coils of same
colour are
parallel
connected.
The coil groups
are delta
connected.

12. Simulation of a 60° turn
Starting point:
full positive
phase at coil 1
End point:
full negative
phase at coil 1+ -

13. Calculating the supply frequency
In one frequency’s half-period the rotor turns 60°.
Then a full period will lead to a 120° turn. For a full
360° turn 3 periods of the frequency are needed.
At 3000 rpm the system will need 9000 periods per
minute, that is equal to 9000/ 60 s = 150 Hz.
Such frequencies need to be generated by a
frequency converter.

14. Advantages of the TAIFUN
concept
• Synchronous driver
– no eddy-current losses and heating-up of
the rotor and the fluid.
– excellent efficiency.
– allows large radial gaps for non-metallics.
• Integrated driver
– double hermetically tight.
– compact design.
– minimised mechanical losses.

15. Dimensions:
Conventional vs. TAIFUN
Same scale
Same size
50-32-200
Comparable
electric motor
15 kW

16. Disadvantage of the TAIFUN concept
• Needs to be operated with frequency
converter
– price of converter about Euro 2000,-
– installation of converter and special cabling
But - operating a pump with
frequency converter results in
a lot of benefits:

17. Advantages of using frequency converters
• Speed of pump is variable:
– Flow control by varying the speed
• mostly energy efficient = money.
• no throttle valves needed = money.
• uncertainty of head calculation tolerated = no trouble.
– Impeller diameter keeps constant. Pump can
replace any other of that type directly.
– Choice of design speed is free, e.g. 4375 rpm
• Converters intelligence is raising:
– Today: Integrated power control
– In future: Diagnostics and trend analyses.

18. Conditions: 7 Cent/kWh - Efficiency 45% - density of water
Example:
Saving 1,0 bar plants throttling
at 25 m³/h with TAIFUN
pays back
4.300,- Euro in 5 years.

19. Prototypes test run on 7.5.1999

20. The developing team.

21. 32 - 200 with integrated
13 kW - synchronous driver....
...in exact sizing to
ISO 2858

22. Presentation at ACHEMA 2000

23. ATEX tests on 2./3. Juli 2001
Measuring the maximum
surface temperatures

24. ATEX tests on 2./3. Juli 2001
Dry run test
The Ax-lock design
blocks the rotor after
approx. 30 sec , without damaging
further parts. Spare part costs:
€ 245,-
Absolut tight
without damaging
the inner savety zone

25. First TAIFUN in operation (3.8.2001)
BASF Pigment, Besigheim, Germany

26. Technical data TAIFUN 32-200
• Chemical pump to ISO 2858, size 50-32-200
• No design variations
• Fixed impeller diameter: 140 mm
• Maximum driver torque: 25 Nm
• Maximum fluid temperature: 150 °C (302°F)
• Max. environmental temperature: 40 °C (104°F)
• Integrated 13 kW driver certified to
II 2 G EEx de IIC T3-T6 ( PTB 01 ATEX 1094 )

27. Hydraulics TAIFUN 32
-200
• High speed =
Low torque =
less required magnetic
mass and better
hydraulic efficiency
• n = 1000 - 5000 rpm
• Q = 1 - 35 m³/h
• H = 5 - 80 m
• 3D - impeller for best
inlet flow conditions
• NPSHmax < 3 m
• Etatotal,max = 45%

28. Performance curves
TAIFUN 32-200

29. Stator
Driver (Stator):
• „Forbidden
zone“:
assembly only
by licensed
electricians/ for
opening
special-tool
required
• bearings not
part of this
zone

30. Outer
cover
Outer cover:
• Additional O-
Rings in case
that the
bearing zone
breaks
• GGG 40.3
and steel

31. Outer and
inner cover
• Flat seals
EURO-GYLON
blue
• PFA-lining
• sleeves out of
siliconcarbide,
not part of the
bearings
Inner cover:

32. Rotor with
bearings
• Magnets out of
Samarium
Cobalt
• Hollow shaft
with PFA-lining
• impeller and
adaptation
piece out of
massive PTFE
• O-Rings out of
FFKM
(Perfluorine-
elastomer)
• rotating
bearings out of
siliconcarbide
Rotor:

33. General view
TAIFUN®
• Static
bearings out
of carbonised
PTFE
• internal
flushing with
about 350 l/h
• not part of
the inner
cover
Bearings:

34. TAIFUN - your plant standard
• Highest safety standard, due to two
independent hermetically tight zones.
• Handles all corrosive and/ or toxic liquids up
to 150 °C
• Only few sizes without variations and with
fixed impeller diameter.
• Local flow conditions are adapted by
energy saving speed control.
• Take it from stock, put it in place, start.

35. The end.