A need to produce potable water for the residents of an island in the United Arab Emirates resulted in Invertek Drives Optidrive Eco variable frequency drive (VFD) being used as part of the reverse osmosis seawater desalination system.

The system was needed at Al Fattan Island, a private development in the UAE, where no mains water was available. Using seawater and purifying it was the only option.

GI.Tech FZE, Invertek’s sales distributor in the region, worked with Gulf Water Treatment, a designer and manufacturer of desalination systems.

Pumps are used in the desalination process to maintain a minimum 1,200psi high-pressure water on a semipermeable membrane in the reverse osmosis process to remove particles and bacteria from the water.

Three pumps are used in the process, pumping 20,000 gallons of water a day.

The Optidrive Eco IP55 was installed and commissioned as part of the solution controlling the 37kW pumps.

“The desalination plant at Al Fattan Island is the only source of clean potable water,” said Soju Sonny Mathew of GI.Tech FZE.

Reliable and capable VFDs are essential

“So, it is essential for the system to have capable and reliable VFDs to control the high-pressure water pumps.

“The water is pressurised at 70bar through the membrane which overcomes osmotic pressure, a colligative property. This process forms part of the desalination process, removing particles and bacteria from the water.

Pumps are performing at optimum levels

“The Optidrive Eco, along with its Optiflow technology, ensures the pumps are performing at optimum levels. This ensures improved efficiency and reduces lifetime costs, as a result, less maintenance and downtime of the pumps.”

Mr Harikrishnan K of Gulf Water Treatment, which was established in 1992 and has developed into a leading technology company with services and solutions for all aspects of water, from chemical treatment to hazardous industrial effluent, as well as seawater desalination, said Optidrive Eco was a perfect solution.

“Our systems have to ensure accurate pressure as part of the reverse osmosis process. And so, to be able to accurately and efficiently control the pumps was crucial.

“The Optidrive Eco was very easy to install and commission, and we know long-term it will ensure maximum efficiency for the desalination plant.” 

Optidrive VFD maximises energy savings

The Optidrive Eco VFD maximises energy savings through constant monitoring of the pumps, optimising the output to match the required flow.

Its advanced sleep and wake functions also provide maximum energy efficiencies by switching off the pump when it’s not required.

The Eco can also detect pump blockages and can clean them automatically, thus reducing maintenance requirements.

Easily and quickly programmed and commissioned

With Invertek’s built-in PLC function, the VFD can also be quickly and easily programmed and commissioned.

Optidrive Eco can control AC Induction (IM) motors, AC Permanent Magnet (PM) motors, Brushless DC (BLDC) motors and Synchronous Reluctance (SynRM) motors. The range covers 200-600v single and three phase input and 0.75kW to 250kW, 1HP to 350HP.

It comes in three enclosure options – IP20, IP55 and IP66 – and seven frame sizes, with OLED displays on IP55 and IP66 models.

For more media information, contact:

Owain Betts, PR and Media Relations, Invertek Drives Ltd

t: +44 (0)1938 558 253 m: +44 (0)7787 437 052

e: Owain.Betts@invertek.co.uk 



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