EKAT

O P

HA

SEJE

T

EKATO Rühr- und Mischtechnik GmbHKäppelemattweg 2, 79650 Schopfheim, Germany

Tel. +49 7622 29-0, Fax +49 7622 29-213e-mail: info@ekato.com

www.ekato.com

Adv

ance

d P

roce

ss S

olut

ions

EKATO PHASEJET®

Process optimization with

the high efficiency gassing impeller

DI N

E N I S O 9 0 0 1

C

E R T I F I E

D

EKATO PHASEJET ® with rotating gas-sparger

Adv

ance

d P

roce

ss S

olut

ions

920-

01-4

27/5

00/0

9.04

Solution

By using the EKATO PHASEJET, the spargerring can be replaced by a simple gas feed-pipe leading to a conically shapeddisc which acts as a predisperser.

The EKATO design has several clearadvantages:

• Cost-savings due to simple design

• No flow back into the pipe when thegas feed is interrupted. This preventscontamination (advantageous for sterileoperations and fermentation processes)

• While ring spargers can become pluggedif crystals are formed at the point of gas-liquid contact, here the reaction takesplace at the predisperser. Due to highturbulence no scaling occurs.

Task

When a disc turbine is used, the gas isnormally introduced through an expensivesparger ring which is often susceptible toplugging or contaminaton during operation.

Power drop for various impellersunder 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 processsteps

• A higher gas feed and a higher flooding point of the impeller when comparedwith the Rushton turbine

• Lower hydraulic radial forces, resulting in smaller shafts and cost savings.

The development of the EKATO PHASEJET demonstrates that even a provenimpeller like the »Rushton« turbine can be improved upon. Rigorous applicationof fluid mechanics, process engineering expertise, state-of-the-art testingmethods and CFD have led to a more efficient impeller which produces higheryields at lower costs.

1.0

0.8

0.6

0.4

0.2

0.00.00 0.04 0.08 0.12 0.16

Ne g

/ N

e 0

Rotating gas-sparger

Gas feedpipe

EKATO PHASEJET®

Concave turbineRushton turbine

Fr = = 0.5n2 · d2g

Gassing number Q = q/n·d23