Visual Level Indicator VLI
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Level Measurement Visual Level Indicators

l Single-pole Magnet System The WEKA VLI operating principle is based on the use of a permanent bar magnet system which ensures the safe and reliable activation of visual indication elements (flags), switches and transmitters, even when used on thick-wall high-pressure indicator pipe. l Magnetic Guide Tape The patented magnetic guide tape is integrated within the indication rail to ensure the float bar magnet is always aligned like a compass needle to the polarized flags and switches. This ensures continuous reliabi lity of the indicating, switching and transmitter control functions. l...

Operating temperature Pipe size Minimum density Recommended viscosity of the fluid All data are valid for the basic versions Execution-A Upper and lower process ports: top to bottom Upper float chamber end: threaded cap Lower float chamber end: threaded flange The WEKA VLI (Visual Level Indicator) program is built up in a modular system. It can therefore be readily configured to precisely match the requirements of a very wide variety of applications and operating conditions. Within each series the basic execu- Execution -B Upper and lower process ports: top to bottom Upper and lower float...

integrated shut-off valves l Wide range of operating conditions Operating pressures can be from vacuum to 500 bar. Float chambers are available with design pressures up to 630 bar. Liquid densities > 0.3 g/cm3 and media temperatures from 77 K to 673 K (–196 °C to +400 °C) allow use for applications like cryo enic liquid gases LPG/LNG, water g hydraulics and steam boilers. Closed floats are available for most liquids at pressures up to 350 bar. Open floats are available for non condensating liquids at pressures up to 630 bar. l Energy-free, reliable operation WEKA VLIs are ideally suited for...

High Pressure – Power Engineered Plastic l Excellent Readability The wide colour contrasted indicating flags are easily and clearly readable, even from far distances. The flag elements are nor mally red and aluminum coloured, but can be optionally ordered with alternative colour combinations. Difficult liquids in corrosive and high/low temperature applications do not effect the reliable functioning of WEKA VLIs, because the liquid inside the float chamber is totally isolated from the indication rail. For the same reason, readability is not impaired by turbid conditions. l Level Measurement...

WEKA VLI Standard, Type 34300-K Magnetic switches are available in various versions Indication Rails The indication rails of WEKA VLIs are never in contact with the process media, and are consequently maintenance-free. The flags of these indication rails are 36 mm wide, and therefore easily read even from far distances. The lightweight flags are mag netically coupled to each other and respond positively even at float displacement speeds of 2 meters per second. The special design of WEKA VLIs ensures reliable readout at all times: the flags hold their positions even in the presence of...

Competence · Partnership Quality · Flexibility · Sustainability Keeping Liquids and Gases under control Learn more about the history of the WEKA and how WEKA has managed to reach the top of the world market! 1940 Arthur Welter and August Karrer founded WEKA. Purpose of the business was manufacture and sale of lead fittings. Within only two years it became necessary to move into larger production facilities. The original version of the WEKA Magnetic Level Indicator was patented. WEKA moved ahead in the area of measurement and control technology. WEKA produced the first cryogenic valves and...

Valves and Cryogenic Components Control and shut-off valves Check valves Safety valves Transfer line couplings Flow meters Ejectors Level Measurement Bypass Visual Level Indicators Top of Tank Visual Level Indicators In-Tank Tank Level Indicators Services Engineering, development and project management Service and Support WEKA AG, Schürlistrasse 8 CH-8344 Bäretswil, Switzerland Phone +41 43 833 43 43 info@weka-ag.ch · www.weka-ag.ch