WEKA Visual Level Indicators VLI

● 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. ● 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 reliability of the indicating, switching and transmitter control functions. ● Magnetic...

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 chamber...

integrated shut-off valves ● 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 cryogenic liquid gases LPG/LNG, water 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. ● Energy-free, reliable operation WEKA VLIs are ideally suited for plant...

High Pressure – Power Engineered Plastic ● Excellent Readability The wide colour contrasted indicating flags are easily and clearly readable, even from far distances. The flag elements are normally 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. ● Level Measurement à la...

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 magnetically 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 vibration...

Know-How ● Quality ● Flexibility ● 1940 Arthur Welter and August Karrer found WEKA GmbH 1949 Reorganisation as WEKA AG 1950 First WEKA Stainless Steel Valve 1962 First patent for the WEKA Visual Level Indicator 1978 First WEKA Cryogenic Valve and Coupling 1981 WEKA becomes part of IMO/GEMS Group, USA 1982 Approval according to the German (AD-HP 0) and Swiss (SVDB501) pressure vessel rules. Audit of first WEKA Quality Control System 1991 New facilities in Bäretswil, approx. 25 km South-east of Zurich 1995 Integration of the European production of GEMS Tank Level Instruments 2001 WEKA joins as...

MicroFlow Valves Stainless Steel Valves Cryogenic Components Your contact for WEKA Visual Level Indicators: Flyer_VLI_EN, 01.13, technical modifications reserved Visual Level Indicators Tank Level Instruments Visual Level Indicators Tank Level Instruments Cryogenic Components Stainless Steel Valves MicroFlow Valves