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1. EKATOPHASEJET
EKATO Rühr- und Mischtechnik GmbH
Käppelemattweg 2, 79650 Schopfheim, Germany
Tel. +49 7622 29-0, Fax +49 7622 29-213
e-mail: info@ekato.com
www.ekato.com
AdvancedProcessSolutions
EKATO PHASEJET®
Process optimization with
the high efficiency gassing impeller
DI
N
E N I S O
9 0
01
C
E
R T I F I E
D
EKATO PHASEJET®
with rotating gas-sparger

2. AdvancedProcessSolutions
920-01-427/500/09.04
Solution
By using the EKATO PHASEJET, the sparger
ring can be replaced by a simple gas
feed-pipe leading to a conically shaped
disc which acts as a predisperser.
The EKATO design has several clear
advantages:
• Cost-savings due to simple design
• No flow back into the pipe when the
gas feed is interrupted. This prevents
contamination (advantageous for sterile
operations and fermentation processes)
• While ring spargers can become plugged
if crystals are formed at the point of gas-
liquid contact, here the reaction takes
place at the predisperser. Due to high
turbulence no scaling occurs.
Task
When a disc turbine is used, the gas is
normally introduced through an expensive
sparger ring which is often susceptible to
plugging or contaminaton during operation.
Power drop for various impellers
under gassing
EKATO PHASEJET®
The patented EKATO PHASEJET impeller with specially
contoured blades which match the gas cavities and prevent
impeller flooding
Benefits
• Almost no reduction of power under gassing conditions
• A cost-effective design with fixed speeds during gassed and ungassed process
steps
• A higher gas feed and a higher flooding point of the impeller when compared
with the Rushton turbine
• Lower hydraulic radial forces, resulting in smaller shafts and cost savings.
The development of the EKATO PHASEJET demonstrates that even a proven
impeller like the »Rushton« turbine can be improved upon. Rigorous application
of fluid mechanics, process engineering expertise, state-of-the-art testing
methods and CFD have led to a more efficient impeller which produces higher
yields at lower costs.
1.0
0.8
0.6
0.4
0.2
0.0
0.00 0.04 0.08 0.12 0.16
Neg/Ne0
Rotating gas-sparger
Gas feedpipe
EKATO PHASEJET®
Concave turbine
Rushton turbine
Fr = = 0.5
n2 · d2
g
Gassing number Q = q/n·d23