Application of magnetic float level gauge in vacuum environment

In the complex field of industrial measurement, vacuum environments consistently pose an extreme challenge to measuring instrument performance.

Level measurement in vacuum environments has always been a technical challenge in industries such as petroleum, chemical, power, metallurgy, food, and pharmaceuticals. Vacuum conditions place special demands on measuring instruments: excellent sealing performance, extremely high reliability, and strong environmental adaptability. Magnetic float level gauges also known as magnetic flap level gauges, demonstrate significant advantages in this field due to their unique principle and structural design, making them an ideal solution for level measurement in vacuum conditions in various equipment, such as towers, tanks, tanks, and spherical vessels.

Technical Advantages in Vacuum Environments

Magnetic float level gauges offer several technical advantages in vacuum environments. Their completely sealed structure effectively prevents gas leaks and ensures the integrity of the vacuum system. Level measurement in vacuum environments presents numerous challenges, which magnetic float level gauges effectively address thanks to their unique design: they are unaffected by the physical and chemical state of the medium, such as conductivity, dielectric constant, foam, pressure, temperature, evaporation, boiling, and bubbles. This level gauge operates without requiring a power source, a feature that makes it inherently safer in vacuum environments with stringent explosion-proof requirements. Magnetic float level gauges can accommodate a wide range of pressures, from vacuum to high pressure. Some models can even withstand pressures from vacuum up to 42 MPa.

Technological Innovations for Vacuum Environments

To meet the unique requirements of vacuum environments, magnetic float level gauges have undergone numerous technological innovations. The vacuum jacket design is another innovation. This design incorporates a vacuum cylinder outside the main tube, insulating the measured medium from the outside world and effectively reducing heat transfer. This is particularly important when maintaining medium temperature in a vacuum environment, preventing frost formation on the measuring tube surface due to excessively low liquid temperatures, or vaporization due to excessively high temperatures.

Applications and Typical Cases

Magnetic float level gauges have a wide range of applications in vacuum environments, covering multiple industrial sectors. In the petrochemical industry, they are used for level detection in various towers, tanks, and tanks, particularly in processes such as vacuum distillation and vacuum filtration. These environments often involve high temperatures, high pressures, and corrosive media, and magnetic float level gauges are well-suited to these complex conditions. Magnetic float level gauges are also widely used for level monitoring in vacuum deaeration systems and condensing equipment in the power industry. In the food and pharmaceutical industries, processes such as vacuum concentration and drying place higher demands on hygiene and measurement accuracy, and magnetic float level gauges are widely used due to their sealing and reliability.

Selection and Installation Key Points

Selecting a magnetic float level gauge for vacuum environments requires consideration of several factors. The choice of wetted material is crucial. Materials such as stainless steel 316L, 304, titanium, PP, PVC, or PTFE-lined should be selected based on the characteristics of the media. The measuring range is also a key factor in selection. The measuring range of a side-mounted level gauge is typically the distance between the centers of two conduits, which can range from 500mm to 6000mm depending on the vessel height. For process connections, flange connections are often used in vacuum environments. DN25/DN20 PN1.6 flanges are standard, but other connection options are also available based on actual needs.

During installation, ensure the level gauge is mounted vertically to ensure the magnetic float can move freely up and down within the main conduit. A shut-off valve should be installed between the level gauge and the container to facilitate material shut-off during cleaning and maintenance.

With the continuous advancement of industrial technology, the requirements for liquid level measurement in vacuum environments will become increasingly stringent. Magnetic float level gauges will continue to develop towards higher accuracy, greater adaptability, and greater intelligence. Their remote transmission function, which transmits liquid level signals to the control room via a standard 4-20mA signal, combined with intelligent diagnostic capabilities, makes magnetic float level gauges an indispensable key device in modern industrial automation systems. In the field of industrial measurement, magnetic float level gauges, with their unique advantages, are poised to play an increasingly important role in vacuum environments and other complex working conditions.