WEKA Visual Level Indicator (VLI)

LocationWEKA is situated in Baeretswil, 25 km south east of Zurich and can be easily reached in half an hour by car or public transport.

Background

• WEKA was founded in 1940• Member of the ARCA Flow

Group since 2001• Leading manufacturer of

instruments for level measurement of liquids, cryogenic components and special valves

• 45 employees• More than 90 percent of the

turnover is realized by exporting

• Our strengths are: development, production and testing of tailor-made solutions

• Instruments for level measurement (VLI and TLI) are sold through a world wide net of representatives

• Cryogenic components and special valves are mostly sold directly to our world wide customer base

ARCA Flow Group

Feluwa Pumpen GmbHMürlenbach, Germany

Pumpswww.feluwa.de

Feluwa Pumpen GmbHMürlenbach, Germany

Pumpswww.feluwa.de

ARCA Regler GmbHTonisvorst, Germany

Valveswww.arca.de

ARCA Regler GmbHTonisvorst, Germany

Valveswww.arca.de

WEKA AGBäretswil, SwitzerlandLevel Measurement &

Special Valveswww.weka-ag.ch

WEKA AGBäretswil, SwitzerlandLevel Measurement &

Special Valveswww.weka-ag.ch

von Rohr AGMuttenz, Switzerland

Valveswww.von-rohr.de

von Rohr ARCA BVEerbeck, Netherlands

salesorganisation

von Rohr AGMuttenz, Switzerland

Valveswww.von-rohr.de

von Rohr ARCA BVEerbeck, Netherlands

salesorganisation

SubsidioriesStrotzbüsch, Germany

Dresden, Germany

SubsidioriesStrotzbüsch, Germany

Dresden, Germany

ARCA Joint Ventures/Partners: Forbes Marshall ARCA Ltd, Pune, IndiaARCA Valvulas S.A. de C.V., Mexico-City/Tampioco,

MexicoSAMYANG-ARCA Co. Ltd., Seoul, South KoreaWuzhong Instrument Co. Ltd., Wuzhong, P.R. ChinaTOA Valve Co., Ltd., Tokyo, Japan

WEKA Joint Ventures: Control Components, Caringbah, Australien

Stainless Steel Valves

10 %

Stainless Steel Valves

10 %

Tank Level Indicators TLI 15 %

Tank Level Indicators TLI 15 %

Cryogenic Components

25 %

Cryogenic Components

25 %

Visual Level Indicators VLI 50 %

Total Revenues ~ 5 Mio. EUR(90% Export)

WEKA is selling worldwide

WEKA worldwide

Quality Policy

Manufacturer Certifications:• ISO 9001:2000• PED 97/23/EC Module H/H1• ATEX 94/9/EC• SVDB 501• AD HP 0 / TRB200

Product Approvals:

Sophisticated production and quality controlA Total Quality Management System is fully established and integrated in the whole production process including sales, manufacturing and administrative belongings

Our Vision

• To be the leader in level measurement of liquids with the float technology

• To be the leader in the cryogenic component market• To grow sustainably• To improve know-how and quality standards continuously• To maintain high flexibility• To act responsible towards customers, environment and

employees

Know-How, Quality, Flexibility

WEKA Company Structure

Urs FaustManufacturing &

Quality Management

Urs FaustManufacturing &

Quality Management

Stefan OttoElectronics

Stefan OttoElectronics

Urs WitzigSales & Marketing

Urs WitzigSales & Marketing

Brigitte PfenningerFinance & Administration

Brigitte PfenningerFinance & Administration

Fridolin HoldenerManaging Director

Engineering

Fridolin HoldenerManaging Director

Engineering

Management Team

WEKA Company Structure

Joe SailerTechnical Sales Coordinator

Joe SailerTechnical Sales Coordinator

Bernhard MeierTechnical Sales Coordinator

Bernhard MeierTechnical Sales Coordinator

Urs WitzigMarketing & Sales Manager

Urs WitzigMarketing & Sales Manager

Stefan OttoProduct Manager Level Instruments

Stefan OttoProduct Manager Level Instruments

Fridolin HoldenerProduct Manager Valves

Fridolin HoldenerProduct Manager Valves

Rolf TschudinTechnical Sales Coordinator

Rolf TschudinTechnical Sales Coordinator

Benjamin KocherSales Apprentice

Benjamin KocherSales Apprentice

Sales & Marketing

Visual Level Indicator(VLI = Visual Level Indicator)

Phyisical principle

Function• Based on the float principle

and the principle of communicating vessels the liquid level inside the VLI is always the same as in the vessel to be monitored

Floats

• Forced level transmission• Hermetically sealed floats• For pressures up to 350bar• Densities > 0.3g/cm3 • Compact dimensions• Large float choice for optimal

selection of the indicator

Bar Magnet System

• Horizontal bar magnet• AlNiCo magnet• Horizontal magnet field• Highest magnetic flux• Large radial extension• Low weight• Single pole activation of accessories

Magnetic guiding tape system

Function• Similar to a compass needle,

the bar magnet inside the float always points to the

• integrated magnetic• guide tape.

NS

Other Magnet Systems

Magnet system• Ring magnet• Fe-Oxyd Magnet• Vertical orientation• Small radial extension• High Weight• Risk of double

switching

Back-to-back Systems• Ring magnets• Fe-Oxyd magnets• Back-to-back orientation• Magnetisch bedenklich• Big radial extension• Very high weight• Long term stability in

question

Visual Level Indicators (VLI)

Simply a sight glass replacement ?

No ...• …it‘s a level indicator• …it‘s a level control• …it‘s a level transmitter

3 functions in one device!

… Level Indicator

• Visual Indication• No external energy required• Direct, on the spot• No need for calibration• Mechanically robust• Perfect Readability• No Discolouration• Maintenance free• Shock proven

... as Level Control

On / OffOn / Off

On / OffOn / Off

• Outside of the Media• Not subject to pressure• Freely adjustable• Multiple switch points• Bi -stable switches• SPST / SPDT Versions• 240VA / 160 W rating• Stainless steel housing• EEx i / EEx d (ATEX)• CE

… as Level Transmitter

4 mA / 0%4 mA / 0%

20 mA / 100%20 mA / 100%

• Outside of the vessel• Not subject to pressure• 10 or 5 mm resolution• Linear- or non-linear Version• Standard 3-wire version• 2-wire 4..20 mA version• Max 350° C media temperature• 316 steel • EEx ia / EEx d / CE• In combination with HART-

Transmitter

Applications

Food industryChemical industryOffshore applicationsPetro and Oil and Gas IndustryPharmaceuticalsHydraulic and thermal power plantsShipbuildingTextile industryWasser tanks and water treatmentEtc.

Operational area

• Pressure ratingsPN6 … PN630

• Media temperatures-40°C … +400°C

• Densities> 0.30g/cm³

• Materials316 / 316LHasteloy® C-276Inconel®

Incoloy®

PVC, PA, PP• With Insulation• With heat tracing

Bi-stable Magnetic Switches

• On/off or change over switches (SPST / SPDT)• Standard-, Mini- or Ex- version• Stainless steel housing• Switch rating up to 250V / 1A• Media temperature up to 400°C • Type approved according European directive

94/9/EC (ATEX) EEx ia and EEx d version

• NAMUR version• PTB approval• CENELEC approval• CE certifictaion

Transmitter

•3-wire version•Max 350°C Media temperature•2-wire 4 - 20 mA•Max. 250 °C Media

temperature •EEx ia and EEx d versions•CENELEC approved•CE marking•Conform to European Directive

94/9/EC (ATEX)

Marine Approvals

American Bureau of Shipping

Det Norske VeritasGermanischer LloydLloyd’s Register of ShippingPolski Rejestr StatkowRussian Maritime Register

of ShippingRegistro Italiano NavaleBureau Veritas

References

Air Liquide

Linde

Cern

Messer Cryotherm

BOC (England)

Air Products

INFN/LNN

IPP

TIFR

Nippon Sanso

Praxair

NIFS

NSW

HDW

Atlas Copco

Marlog

Fincantieri

Mazagon

GRSE

Visual Level IndicatorsCryogenic- and Special

ValvesTank Level Indicators

Shell

ABB

Krupp-Uhde

Air Liquide

Snambrogetti

Foster Wheeler

Linde

Kvaerner

Axima

Sulzer Friotherm

Caliqua

Summary

Weka Visual Level Indicators are :• Perfect readability of the liquid level• 3 functions in one instrumnent: Level indication, level

switch and level transmitter• Works as level indication without external energy supply • Patented WEKA magnet-system• Versatile• Adaptable• Reliable (over 40 years of proven experience)• Cost effective

Thank you for your attention