Seven Hills International Limited




UV PowerPlus - HydroFloat - UV Disinfection for Closed Tanks

By combining UV HydroFloat and HydroActive, we can effectively convert your tank into an UV reactor - Total Disinfection
(Even existing closed tank can be converted)


Seven Hills – UV PowerPlus, UV Disinfection systems are developed for chemical free disinfection of closed tanks.

HydroFloat and HydraActive systems were developed as an alternate disinfection system to replace expensive and un friendly chemical method to disinfect water.

UV HydroFloat and HydroActive are designed to treat water (& Aqueous Solutions) in storage tanks by UV irradiation.

HydroFloat (floating UV reactor) is applied in closed tanks of static and strongly varying fill levels.

HydroActive (immersed UV reactor) is used in tanks, rinses of static fill levels and also for machinery.

HydroFloat irradiates the water, the walls of the tank above and below water level and also the air above the surface with UV-C light. This multiple angle UV sterilizing technique of UV HydroFloat (in combination with UV HydroActive) ensures total disinfection of water and completely eliminates bio film formation.



In doing so, we ensure that the water is disinfected and further avoid re infection even with high condensate / moist tank inner wall above the High / High level of the water tank.

HydroFloat disinfects the whole tank (liquid, atmosphere and tank surface) by building up a germ barrier.

This chemical free solution offers a higher efficiency compared to chemicals because germs cannot become resistant against prolonged UV irradiations.

Further, this process works without the Negative side effects of Biocides. It helps avoid expensive reprocessing of water / products produced using infected water. It also helps increase the availability of process tanks (as no reprocessing is required). Saves money on chemicals.



UV PowerPlus - HydroFloat System components


For Closed Tanks:


HydroFloat in Storage Tank HydroFloat & HydroActive in combination, converting your tank into UV Reactor


UV PowerPlus HydroFloat system is effective when combined with UV PowerPlus HydroActive.

HydroFloat and HydroActive can be applied to closed tanks, the flexibility of the system is such that it can be easily adapted to

  • The Shape of the tank

  • Flow rate

  • The water Quality

The System is customised to each application with suitable number of HydroFloat and Hydra Active

Electrical Control Panels
Safety Interlock controllers etc


Unique Characteristics of UV PowerPlus - HydroFloat System

  • UV HydroFloat , a Unique UV reactor irradiate the water, the walls, the air above the water in a closed tank.

  • UV HydroFloat , builds up a strong germ barrier to ensure water is 100% Sterile and free from Bio Film Growth

  • UV HydroFloat , disinfect water and also prevents re growth and future infection due to moist tank walls

  • UV HydroActive , immersed UV reactor in water tank that irradiate in the water

  • UV HydroActive , immersed UV reactor can also be applied to disinfect tanks independently, this is mainly for the open tank applications.

  • UV HydroActive , come with an integrated level senor for automatic ON / Off control for a safe operation.

  • UV HydroActive , immersed UV reactor in water tank that irradiate in the water

  • Highly cost effective and very less maintenance and chemical free water treatment.

  • Very High performance efficiency

  • Total Elimination of negative side effects of BIOCIDES for process media

  • Environmental friendly water disinfection system.

  • Systems built with multi safe guard to ensure smooth and safe operation.

  • It improves efficiency in water treatment processes due to advance & optimised control


UV PowerPlus - HydroFloat System – Specifications (*)


Power Watts
UV Flux W at 254nm
A mm
C mm
HydroFloat 1/0
Upto 0.5 m3
HydroFloat 2/0
Upto 2.0 m3
HydroFloat 3/0
Upto 4.0 m3
HydroFloat 3/1
Upto 6.0 m3


(*) the data above are based on our standard products, tap water quality and fixed tank size / flow rate ration.
For all other requirements please contact us Click to email  (or)
Call us on +44 (0)121 270 4074


UV PowerPlus - HydroFloat System – prevents disinfection via ventilators in closed tanks



Additional Information


Additional Information on
Chemical Free Cooling Tower Water Treatment



Application Areas for UV PowerPlus - HydroFloat & HydroActive systems



Food & beverages



DM water storage tank

RO Water storage tank

Drinking Water storage tank

Water Re circulations plant

Chemical Free Cooling Tower Water Treatment

Climatic Chambers

Scrubbers and humidifiers

Copper lines electrolytic unit

Cold coating lines – Acid and Neutral line

Phosphate lines

Alkaline Developer and Rinser

Hot Air Process

Galvanisation Plant

Water Purifications plants etc