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Scherrer Group

MAVADRIVE®

Bottom and top entrymagnetic agitators

MAVAGProcess TechnologyBusiness area mixing technology

2 For longer shafts and multi stage imdesigns.Here the magnetic coupling is soutside of the vessel and inside a hoThe shaft bearings which are on thside of the coupling can be designdry running and then are made frotech ceramic material.Tailor made design using our pcomponents is available on reque

Impellers for MDA - IAs the design of MDA - I agitatorsthe tank is similar to agitators witdard drive systems almost any impeller can be taken.Nevertheless we prefer to chooselers which create a low torque.

Impellers are available• acc. to MAVAG - design• acc. to DIN 28 131• acc. to your specification

bottom entry, center mounted

Typical agitator mounting

TYPE MDA - I

Besides our well known agitators forhygienic or sterile applications with me-chanical seals we offer a wide range ofagitators with magnetic drives.MAVADRIVE® agitators absolutely preventany contact between in-tank and outsideatmosphere by means of the containmentshell instead of a shaft seal.Main advantages:• no emissions• no product contamination• no seal problems• less maintenance

MAVAG is the patent-holder for a numberof innovative design features. AsMAVADRIVE® agitators are designed forcleaning in place (CIP) and steamsterili-sation in place (SIP) they are frequentlyused in hygienic and sterile processes.

Ask for our reference list.

Our process know how and long termexperience make sure that your agitationtask will be solved to your full satisfaction:

• Homogenizeto achieve short mixing time and highmixing quality

• Suspendkeep solids in suspension, to yourspecified extent

• Heat transferimprove the heat transfer including anoptimized vessel design

• Disperseimprove the mass transfer betweentwo phases

• Gas distributiona minimized gas bubble size togetherwith a perfect gas distribution give abetter process efficiency.

We take responsibility for scale-up. Test

work together with our customers is thebasis for tailor-made design.

Process plants

Mixing

Magnetic agitators,Sterile agitators,S.s. vessels

Process engineering

Manufacturing, Installation,Commissioning

Qualification,Validation

Perfect welding in our workshop

Testing of materialsMaterials surface to your specification(grinding, electropolishing etc.)

MAVAGMIXING TECHNOLOGY

MAVAG PROCESS ENGINEERING

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3QUALITY ASSURANCE

MAVAG's well respected quality is main-tained by our quality assurance system.Some important aspects are:• regular procedures within our organi-

sation• further vocational training• qualified subsuppliers• test of purchased goods• MAVAG's well equipped workshop

VALIDATION

Often process plants where MAVADRIVE®

agitators are installed have to be validatedprior to startup of production. An inde-pendent research institut has proved thatour agitators can be validated withoutany limitation.MAVAG assists the customer throughprovision of all the documents and testreports needed (DQ, IQ, OQ as well asPQ-documentation). In addition, we can

equip our agitators with speed control,temperature control etc. to monitor theproduction process.

APPLICATIONS

MAVADRIVE® agitators are especiallyused in branches such as

• pharmaceutical industry• bio technology• beverage industry• food industry• chemistry• high pressure technics

TECHNICAL INFORMATION

MAVADRIVE® agitators can be mountedon top of the vessel. Other applicationsrequire bottom entry or side entry design.All of them use MAVAG's magnetic coup-ling which basically consists of the drivingmagnetic rotor on the outside, the drivenmagnetic rotor on the inside and, betweenboth of them, the containment shell.The shell forms part of the vessel. Iteliminates any possibility of leaks as thereis no shaft penetrating the vessel wall.

From the sterile point of view the contain-ment shell is to be welded to the vessel.Nevertheless, there are more ways to fixthe shell to the vessel wall.

Thanks to improved magnetic materialsthe torque that can be transmitted hasbeen significantly increased in the lastyears.

MAVAG provides magnetic drives witha torque of up to 170 Nm as per standard.Higher torques can be specially accomo-dated.Normally, the temperature should notexceed 200 °C but special design allowsfor up to 300 °C.

DESIGN FEATURES

MAVADRIVE® agitators are designed bymeans of modern CAD work stations.The design• follows GMP regulations• enables CIP cleaning procedures• allows for SIP sterilization

Drive connection by bayonet socket,stainless steel operating board

Pilot unit for scal up

DRIVESTypical drive options are• vertical design, i.e. motors (direct drive)

or helical geared motors• horizontal design, i.e. helical-bevel

geared motors• pneumatic drives

Electric motors can be installed• as AC- or DC-motors

• with explosion proof design• with speed control by means of mecha-

nical speed variation or frequencyconverter

• with soft start up• with control panel• with further accessories to your requi-

rements

Our MDB-type agitators are well defor bottom mounting. As the magcoupling avoids sealing problemsadvantages of a bottom mounted acan be taken into account:• no agitator influence on the ves

(weight, forces, space etc)• less agitator weight (no shaft)• lower center of gravity of the v• easy demounting of the drive• mixing of very small volumes

DESIGN OPTIONS

• type MDB - Hwith helical-bevel geared motorless height

• type MDB - Vwith vertical mounted drives

TYPE OF IMPELLERS

Usually, MAVAG's double acting imwith low diameter ratios (< 0.higher speeds are chosen, espec• MAVAG impeller• Marine type propeller• Rushton turbine• Tooth disc

Ceramic bearing

Impeller withencapsuled magnets

options: MAVAG ImpellerMarine-Propeller, Dissolver

Ceramic bearing

Driving magnet

Welding flangeand shell

Drive

Option: MDB-Hwith lowering device

Lowering device

MAVADRIVE® TYPE MDBFOR BOTTOM ENTRY4

Welding containment shell

Principal sketchof MAVADRIVE® MDB-V

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Our MDB-type agitators are well designedfor bottom mounting. As the magneticcoupling avoids sealing problems all theadvantages of a bottom mounted agitatorcan be taken into account:• no agitator influence on the vessel top

(weight, forces, space etc)• less agitator weight (no shaft)• lower center of gravity of the vessel• easy demounting of the drive• mixing of very small volumes

DESIGN OPTIONS

• type MDB - Hwith helical-bevel geared motor, forless height

• type MDB - Vwith vertical mounted drives

TYPE OF IMPELLERS

Usually, MAVAG's double acting impellerswith low diameter ratios (< 0.5) andhigher speeds are chosen, especially• MAVAG impeller• Marine type propeller• Rushton turbine• Tooth disc

SPECIAL FEATURES

• the patent covered MAVAG doubleacting impeller design which allows forhydrodynamic compensation of theimpeller thrust. We therefore manageto have almost no wear at the bearingwhich is made of high tech ceramics.

• multi stage impellers are possible• speed control by means of a new and

innovative sensor design

• utilization of a lowering device for thedriving magnetic rotor, depending onthe torque.

• several options to connect the flangeof the containment shell with the vessel(welded design preferred, but alsoflanges to national standards, bayonetsocket etc.)

• easy to clean (CIP)• MAVADRIVE® type MDB can be validat-

ed.

MAVADRIVE® TYPE MDBFOR BOTTOM ENTRY

5

Principal sketchof speed control

Impeller

Magnet

Transmittersystem

Cable

Cable connection

Welding containment shell Exchangeable containment shellExchangeable containment shell

special design

MAVAG-Impeller (double acting impeller)

6

MAVADRIVE® Type MDA-E

QUALITY ASSURANCE

MAVAG's well respected quality istained by our quality assurance sSome important aspects are:• regular procedures within our o

sation• further vocational training• qualified subsuppliers• test of purchased goods• MAVAG's well equipped works

VALIDATION

Often process plants where MAVADagitators are installed have to be vaprior to startup of production. Apendent research institut has provour agitators can be validated wany limitation.MAVAG assists the customer tprovision of all the documents anreports needed (DQ, IQ, OQ as wPQ-documentation). In addition, w

TECHNICAL INFORMATION

MAVADRIVE® agitators can be mon top of the vessel. Other applicrequire bottom entry or side entry All of them use MAVAG's magneticling which basically consists of the magnetic rotor on the outside, themagnetic rotor on the inside and, beboth of them, the containment shThe shell forms part of the veseliminates any possibility of leaks ais no shaft penetrating the vesse

From the sterile point of view the cment shell is to be welded to the vNevertheless, there are more waythe shell to the vessel wall.

Thanks to improved magnetic mathe torque that can be transmittbeen significantly increased in tyears.

MDA agitators are designed for mountingon top of a vessel. Main aspect to consideris the kind of shaft bearing:

TYPE MDA - E

The containment shell is shaped like atube. The ceramic bearing and the impellerincluding the driven magnetic rotor areall mounted at the end of the tube. Insidethe tube runs the shaft under atmosphericconditions, with the driving magneticrotor at its end.

Advantages:• Standard instead of ceramic ball bea-

rings can be used for the shaft.• The impeller slide bearing is made from

hightech ceramic which is almost freeof wear.

Impeller for MDA- EImpeller with higher speeds will be pre-ferred, especially• marine type propeller• Rushton turbine• tooth disc• pitch blade turbine

Drive connection by bayonetstainless steel operatin

MAVADRIVE® TYPE MDAFOR TOP MOUNTING

MDA-E

Impeller withencapsuledmagnet

Containment shell

Driving magnet

Ceramic Bearing

Shaft

Ball bearing

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Ceramicbearings

Driving magnet

Connectionfor CIP/SIP

For longer shafts and multi stage impellerdesigns.Here the magnetic coupling is situatedoutside of the vessel and inside a housing.The shaft bearings which are on the tankside of the coupling can be designed fordry running and then are made from hightech ceramic material.Tailor made design using our provencomponents is available on request.

Impellers for MDA - IAs the design of MDA - I agitators insidethe tank is similar to agitators with stan-dard drive systems almost any kind ofimpeller can be taken.Nevertheless we prefer to choose impel-lers which create a low torque.

Impellers are available• acc. to MAVAG - design• acc. to DIN 28 131• acc. to your specification

SPECIAL FEATURES

• designed for CIP and SIP. The specialdesign of the MDA - I containment shellallows CIP/SIP also for this part of theagitator

• speed and temperature can be moni-tored

• lowering device for the driven magneticrotor/impeller ( MDA - E )

bottom entry, center mounted bottom entry, off center mounted to the sideof a conical bottom

top entry,off center

Typical agitator mounting

MDA-I: Principal drawing

MAVADRIVE® Type MDA-300-I

TYPE MDA - I

Housing

Shaft

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We offer a wide range of machinery,systems and plants for sophisticatedprocesses. Our strength is based on thefact that we carry out turn-key projectsas well as key components and service.So the scope of supply will always beexactly to your requirements.

With the help of our process know-howand the experience of our engineers wecan start the job doing the basicengineering. We then serve our customersnot just until commissioning is done.

Sometimes validation, always after-sales-service are the next steps towards agood partnership between you and us.

The advantages for you:

• one responsible partner to speak to• effective project handling• safety and reliability due to many years

of experience

MAVAG PROCESS ENGINEERING

What can we do to serve you?

Speak to our business area:

MAVAG sterile technology

MAVAG bio technology

MAVAG filtration technology

MAVAG mixing technology

MDV

98.

07.o

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Biotechnic/MAVAG USA

P.O. Box 1407Windermere, FL 34786-1407Tel: (407) 292-4812Fax: (407) 292-5306Web Site: www.biotechniconline.come-Mail: biotech1@concentric.net Scherrer-Group