Transcript Technologien zur Füllstandsmessung

WEKA Visual Level Indicator (VLI)
Location
WEKA 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 tailormade 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
Subsidiories
Strotzbüsch, Germany
Dresden, Germany
Feluwa Pumpen GmbH
Mürlenbach, Germany
Pumps
www.feluwa.de
ARCA Regler GmbH
Tonisvorst, Germany
Valves
www.arca.de
von Rohr AG
Muttenz, Switzerland
Valves
www.von-rohr.de
von Rohr ARCA BV
Eerbeck, Netherlands
salesorganisation
WEKA AG
Bäretswil, Switzerland
Level Measurement &
Special Valves
www.weka-ag.ch
ARCA Joint Ventures/Partners: Forbes Marshall ARCA Ltd, Pune, India
ARCA Valvulas S.A. de C.V., Mexico-City/Tampioco, Mexico
SAMYANG-ARCA Co. Ltd., Seoul, South Korea
Wuzhong Instrument Co. Ltd., Wuzhong, P.R. China
TOA Valve Co., Ltd., Tokyo, Japan
WEKA Joint Ventures:
Control Components, Caringbah, Australien
WEKA is selling worldwide
Visual Level
Indicators
VLI 50 %
Cryogenic
Components
25 %
Tank Level
Indicators
TLI 15 %
Stainless Steel
Valves
10 %
Total Revenues ~ 5 Mio. EUR
(90% Export)
WEKA worldwide
Quality Policy
Sophisticated production and quality control
A Total Quality Management System is fully established and integrated in the
whole production process including sales, manufacturing and administrative
belongings
Manufacturer Certifications:
• ISO 9001:2000
• PED 97/23/EC Module H/H1
• ATEX 94/9/EC
• SVDB 501
• AD HP 0 / TRB200
Product Approvals:
Our Vision
Know-How, Quality, Flexibility
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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
WEKA Company Structure
Management Team
Fridolin Holdener
Managing Director
Engineering
Urs Witzig
Sales & Marketing
Stefan Otto
Electronics
Brigitte Pfenninger
Finance & Administration
Urs Faust
Manufacturing &
Quality Management
WEKA Company Structure
Sales & Marketing
Urs Witzig
Marketing & Sales Manager
Joe Sailer
Technical Sales Coordinator
Bernhard Meier
Technical Sales Coordinator
Rolf Tschudin
Technical Sales Coordinator
Benjamin Kocher
Sales Apprentice
Stefan Otto
Product Manager
Level Instruments
Fridolin Holdener
Product Manager Valves
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
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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
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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.
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N
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
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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
On / Off
On / Off
… as Level Transmitter
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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
20 mA / 100%
4 mA / 0%
Applications
 Food industry
 Chemical industry
 Offshore applications
 Petro and Oil and Gas Industry
 Pharmaceuticals
 Hydraulic and thermal power plants
 Shipbuilding
 Textile industry
 Wasser tanks and water treatment
 Etc.
Operational area
• Pressure ratings
PN6 … PN630
• Media temperatures
-40°C … +400°C
• Densities
> 0.30g/cm³
• Materials
316 / 316L
Hasteloy® C-276
Inconel®
Incoloy®
PVC, PA, PP
• With Insulation
• With heat tracing
Bi-stable Magnetic Switches
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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
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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 Veritas
 Germanischer Lloyd
 Lloyd’s Register of Shipping
 Polski Rejestr Statkow
 Russian Maritime Register of
Shipping
 Registro Italiano Navale
 Bureau Veritas
References
Visual Level Indicators
Tank Level Indicators
Cryogenic- and Special Valves
Shell
NSW
Air Liquide
ABB
HDW
Linde
Krupp-Uhde
Atlas Copco
Cern
Air Liquide
Marlog
Messer Cryotherm
Snambrogetti
Fincantieri
BOC (England)
Foster Wheeler
Mazagon
Air Products
Linde
GRSE
INFN/LNN
Kvaerner
IPP
Axima
TIFR
Sulzer Friotherm
Nippon Sanso
Caliqua
Praxair
NIFS
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