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Drinking water - Desalination solutions - Danfoss

Sustainable desalination with maximum energy efficiency

According to the UN, water scarcity is one of the major challenges facing the world today and tomorrow. The need to find sustainable solutions for new freshwater supplies is urgent; solutions that take the straight road from saline to fresh water at low cost and with minimum impact on climate and nature.

Due to its high energy efficiency and reliability, Sea Water Reverse Osmosis (SWRO) is one of the most sustainable and cost effective solutions for converting sea water to potable fresh water. At the same time, SWRO technology undergoes rapid development to improve energy efficiency and support large-scale freshwater production.

Features and benefits

Extremely low energy consumption

Ultra-low maintenance costs

Simple to operate

Minimal service and long service intervals

Small footprint but effective, compact and light in weight

Reverse Osmosis (SWRO)

Sea Water Reverse Osmosis may hold the key to prevent a global water crisis, but it requires powerful technology to be viable on a global scale.

Our four core technologies work together to make SWRO efficient and environmentally friendly.  

Danfoss takes lead in SWRO innovation

Danfoss is committed to supporting the sustainable desalination industry with energy efficient SWRO solutions. The product offering includes four core technologies, comprising high-pressure pumps, AC drives, energy recovery devices and pressure and fluid control devices. These combine into highly efficient and lasting water purification solutions that return energy savings of up to 65% compared to traditional centrifugal pump systems without energy recovery devices and drives.

By land, by sea - anywhere

At large scale, reverse osmosis plants are capable of providing freshwater to entire cities while compact solutions are ideal for supplying hotels and resorts, ships, and offshore facilities with clean water.

Desalination of salt water - Danfoss

Today’s challenge – Tomorrow’s opportunity

Water is vital for life. Shortage of fresh water has spurred innovation to find efficient and climate-friendly solutions that turn seawater into fresh, clean water.

Reverse osmosis is the leading technology. It is simple, reliable and requires less energy than other desalination techniques.

Desalination system by Danfoss

Creating a sustainable future with seawater

65% savings on your desalination systems with Danfoss high-pressure pumps, Danfoss pressure transmitters, Danfoss drives and Danfoss energy-recovery devices (iSave) compared to desalination plants with centrifugal pumps and without energy-recovery devices and drives.

Acciona modular desalination plant - Danfoss

Acciona and Danfoss create innovative SWRO

Technologically advanced solutions allowed Acciona to create an innovative sea water reverse osmosis (SWRO) modular desalination plant for the Sarlux refinery in Sardinia, Italy, reducing energy consumption compared to traditional solutions.

Related products

  • VLT® AQUA Drive FC 202
    VLT® AQUA Drive FC 202

    VLT® AQUA Drive FC 202 controls all types of pumps and comes equipped with a cascade controller.

  • iSave energy recovery device - Danfoss
    Energy Recovery Device for small to medium SWRO applications

    The 3-in-1 Energy Recovery Device (ERD) optimized for sea water reverse osmosis applications.

  • APP high-pressure pumps - Danfoss
    High-pressure pumps for desalination reverse osmosis applications

    High-pressure pumps for land based, off-shore and marine desalination reverse osmosis applications

  • DST P40I pressure transmitter
    DST P40I titanium pressure transmitter for harsh environments

    For use in corrosive environments, Danfoss offers the new robust DST P40I pressure transmitter made of Titanium and with ceramic pressure sensing element. DST P40I is optimized for use in applications such as desalination systems, seawater cooling, and chemical processing.

Case stories

  • Danfoss supply energy efficient SWRO to resort in Maldives
    Danfoss supply energy efficient SWRO to resort in Maldives

    Compact, reliable and energy efficient pumps and ERDs from Danfoss are chosen as key components for SWRO plant producing fresh water for a multi-island resort complex in the Maldives.

  • RO plant for new luxury hotel designed and installed in record time
    RO plant for new luxury hotel designed and installed in record time

    In addition to a fast design and installation, the customer's needs for energy efficient solutions were met by using pumps and energy recovery devices from Danfoss.

  • Reduced energy costs with Danfoss APP pumps and iSave ERDs - HPP case study
    Reduced energy costs with Danfoss APP pumps and iSave ERDs

    A reduction of 57% on the energy consumption was achieved by retrofitting with Danfoss pump and iSave ERD.

  • Danfoss pumps aboard submarine
    Small footprint and reliability bring Danfoss pumps aboard submarine

    APP and PAHT pump technologies supply the Royal Navy’s submarine with ultra-pure water for all water operations on-board.

  • Danfoss pumps solve Chinese wastewater treatment rules
    Compact and efficient Danfoss pumps solve Chinese wastewater treatment rules

    APP pumps retrofit a large coal liquification plant with wastewater treatment to ensure ZLD compliance quickly and reliably.

  • salmon industry - Danfoss
    Danfoss technology reduces energy consumption in salmon industry with 50%

    Energy efficient pumps and energy recovery devices help the Norwegian aquaculture industry to remove sea lice from salmon gently, sustainable, and effectively.


  • DST P40M pressure transmitter for marine applications
    Corrosion-resistant titanium for high-performance control

    The marine industry has adopted the use of exhaust-gas scrubbers and ballast water treatment systems to meet the International Maritime Organization’s strict environmental legislation. Read more about the corrosive environments of these systems requiring tough, high-performance controls.

  • Fresh water fountains with pd pumps danfoss
    Cost-effective water supplies with pd pumps

    The scarcity of fresh water resources and the need for additional water supplies is critical in many regions of the world and will be increasingly important in the future. The UN has made availability of water and sanitation for all, one of the Global Development Goals.

  • Making the case for positive displacement pumps in SWRO - Danfoss
    Making the case for positive displacement pumps in SWRO

    Large-flow positive displacement pumps are entering the market with potential to bring down energy consumption by 20%

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