Medium-pressure UV-C lamps
Medium-pressure UV-C (MPUV) lamps are widely used in high-performance disinfection systems where compact design and high output are essential. Operating at temperatures of 600–900°C, they deliver intense, polychromatic radiation from ~200 nm into the visible range. This broad spectrum enables both effective microbial inactivation and advanced oxidation (AOP) for degrading complex pollutants. Their high energy density allows treatment of large flow rates with fewer lamps, resulting in compact systems that are well suited for space-constrained or retrofit applications.
Broad, polychromatic spectrum.
Fewer lamps required, facilitating compact system footprint.
Stable performance, independent of water temperature. This makes medium-pressure systems suitable for demanding and variable operating conditions.
Temperature management
Medium-pressure lamp performance is largely independent of ambient temperature. Because mercury is fully vaporized during operation, UV output remains stable across varying environmental conditions. This ensures consistent disinfection performance and reduces the need for temperature control in system design.
Lamp placement and maintenance
The high output per lamp reduces the number of lamps required, simplifying system design and lowering maintenance effort. Fewer components mean less frequent replacement and easier servicing. Although the energy consumption is higher the total cost of operation is similar to low-pressure lamp based system.
Mercury content & recycling
Medium-pressure lamps contain mercury, which is essential for UV generation. While individual lamps may contain more mercury, fewer lamps are needed per system. Proper collection and recycling are required to minimize environmental impact and comply with regulations.
Safety during operation
Medium-pressure UV-C lamps operate at high temperatures and power levels, requiring robust system design and shielding. Treatment chambers are fully enclosed to prevent exposure to UV radiation, which can be harmful to skin and eyes. In addition, systems are typically equipped with interlocks and sensors that automatically shut down the lamp when access points are opened or abnormal conditions are detected. Proper cooling are also critical to safely manage the high thermal load during operation.
CO₂ footprint
Medium-pressure systems generally have a higher energy demand compared to low-pressure systems due to their high power density. This can result in a higher operational carbon footprint, particularly in energy-intensive applications. However, their ability to treat large flow rates with fewer lamps and compact systems can partially offset this at system level. The overall CO₂ footprint therefore depends strongly on application design, energy source, and operational efficiency.
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