220 PP Series
Units from 0.2kW to 6.0kW - max flows 30m³/h to 1650m³/h
16.000 hours guaranteed lifetime ULTRATHERM™ UV lamps
Available in PEHD
ACN series designed to reduce dark areas at low UVT
Access to lamps and quartz without the need of tools
Automatic mechanical wiper system
GFRP Closed Cabinet

PP Series for Corrosive Environments

ULTRAAQUA’s polypropylene (PP) closed reactor series offers very high quality at a reasonable price. They are extremely versatile due to their corrosion-resistant construction and a flow range from 5 to 1650 m3/h. As a result of attractive price/performance ratio and excellent long term experience many customers select PP reactor based systems also for fluids that are non-corrosive. The major benefits are:

  • Rigid, corrosion-resistant construction for very harsh environments
  • Temperature sensor in titanium housing
  • Simple installation, operation and maintenance
  • Available with standard or advanced control cabinets
  • Optional UV monitoring with digital UV ÖNORM certified sensors
  • Available with DIN or ANSI flanges
  • No tools needed for scheduled maintenance
  • GFRP control cabinet optimized for corrosive environments
  • 16000 h guaranteed lamp lifetime


The main advantages of UV stabilized PP over PEHD and PVC are:

  • PP is more temperature resistant
  • PP is more pressure resistant
  • PP is chemically resistant to salts, acids, bases, oils etc.
  • PP has extremely long lifetime




Available in PP & PEHD

For applications with high concentrations of ozone in the water or if the treated fluid is very cold (below 0°C) ULTRAAQUA recommend PEHD.


UVT – UV transmittance

UV transmittance is the fraction of electromagnetic radiation at 254nm that passes through a water sample of typically 10mm length (UVT10 or T10). In relation to UV-system sizing this parameter is as decisive as water flow rate. In general, the higher water quality, the higher UVT. However, water that looks very clear can have low UVT if it contains certain dissolved substances such as iron and manganese. ULTRAAQUA will free of cost measure UVT or we can estimate it based on our vast experiences.

For low UVT applications (UVT < 70%), please consider LUVT Series.



Large particles may serve as protective vessels for smaller microorganisms. In fact most microorganisms often live together in clusters. Required UV dose to inactivate organisms freely suspended in the water is significantly lower compared to organisms of the same specie residing in large particles. For this reason prefiltration may be required. Based on our experiences we generally recommend 50 micron prefiltration. Please note that small concentrations of large particles are very difficult to measure. Turbidity and UVT measuments are generally dominated by smaller particles or dissolved substances, respectively. In most cases, money are well spend on pre-filtration prior to the UV radiation, and UV systems should always be installed down flow of filtration.


Even bigger systems …

ULTRAAQUA can produce optimized custom made UV systems based on your specific requirements. As an example we can deliver UV systems with customized connection sizes and/or orientation of connections (L, Z or angled configuration). We can also produce systems even bigger than the standard stocked systems (standard systems, see below tables). It is possible to combine control panels for installations where multiple UV reactors operate simultaneously. Please contact ULTRAAQUA representative or ULTRAAQUA directly to discuss the various possibilities.


75 PP Series MR1-75PP MR2-75PP MR3-75PP MR4-75PP
Max. flow 7 m³/h 14 m³/h 27 m³/h 45 m³/h
Lamp power 0.10 kW 0.20 kW 0.20 kW 0.30 kW
Inlet/outlet dia. 1½” BSP 1½” BSP 2″ BSP DN100


220 PP Series MR1-220PP MR3-220PP MR4-220PP MR6-220PP MR8-220PP MR12-220PP MR16-220PP
Max. flow 35 m³/h 115 m³/h 155 m³/h 230 m³/h 310 m³/h 460 m³/h 590 m³/h
Lamp power 0.20 kW 0.70 kW 1.0 kW 1.4 kW 1.9 kW 2.9 kW 3.8 kW
Inlet/outlet dia. DN80 DN150 DN150 DN150 DN200 DN250 DN250


350 PP Series MR1-350PP MR3-350PP MR4-350PP MR6-350PP MR8-350PP MR12-350PP MR16-350PP
Max. flow 55 m³/h 245 m³/h 365 m³/h 570 m³/h 830 m³/h 1250 m³/h 1650 m³/h
Lamp power 0.4 kW 1.1 kW 1.5 kW 2.3 kW 3.0 kW 4.5 kW 6.0 kW
Inlet/outlet dia. DN100 DN150 DN150 DN200 DN250 DN300 DN300

*Flange size can be customized

*Max. flow calculated at UVT 96%, min UV dose 30 mJ/cm2



ULTRAAQUA products are available worldwide. Please use the contact form to the right and we will refer you to the nearest distributor.

Call us
+45 7023 1020


Response within 24 hours


Allas sea pool, Finland

ULTRAAQUA PP systems are used for treating seawater at Allas sea pool in Helsinki. This result in a safe swimming experience for the swimmers.

Fish farm, Spain

ULTRAAQUA MR6-350PP installed in molluscs fish farm in Spain.

National Test Center, Korea

UV systems for seawater disinfection.

Fish processing plant. Glyngøre, Denmark

MR4-220PP after years in operation.