High-pressure pumps for reverse osmosis applications

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Energy efficient axial piston pumps for desalination

With Danfoss high-pressure axial piston pumps tailored to Sea Water Reverse osmosis (SWRO) applications you will get one of the most reliable and sustainable pumps for desalination. The APP pumps can be used in almost any SWRO application – land-based, offshore or marine. Mounted in containers or trains, the APP pumps can contain several pumps in parallel to secure uninterrupted and sufficient supply at any time.

Danfoss has pioneered axial piston pump technology in challenging hydraulic applications for several years. With more than 15 patents, a strong precision engineering heritage and world-class production know-how in Duplex, Super Duplex and carbon-reinforced PEEK, Danfoss designs and produces the most advanced high-pressure pumps available for reverse osmosis. The APP pump for RO systems is oil-free, using only water for lubrication. Most pumps for RO systems can be delivered with ATEX and API 674 approvals.

The Danfoss APP pumps for reverse osmosis systems are available in various sizes from 0.6 m3/h to 92 m3/h for use in small and medium-sized SWRO facilities.

Features and benefits

Extensive application know-how

Highest efficiency rates in the industry

Compact and small – half size of competing pumps

Long time between service intervals

Easy and service-friendly design

Simple and reliable with high uptime

Short pay-back time

Meet Jan from Danfoss HPP

Meet Jan - our service manager

He gets to travel to exotic locations all around the world and help our customers set up and   use our solutions and technology.

How it worksApp pumps how it works

Resort, onshore reverse osmosis - Danfoss

Make fresh water in a sustainable and energy-efficient way

Reduce energy costs by applying the Danfoss APP pump

Compact and simple design

Due to its high energy-efficiency and reliability, SWRO has turned into one of the most sustainable and cost effective desalination solutions for land-based, offshore and marine applications. The technology is reliable and safe with high-pressure pumps forcing seawater through desalination membranes to create fresh water. Danfoss supplies expertise and unique technologies that can offer your business high efficiency, low maintenance and flexible configuration.

The importance of energy efficiency in the desalination process

Juan Manuel Ortega, renowned desalination expert, tells about the importance of using highly efficient energy recovery devices and high-pressure pumps.

isave erd brochure

Superior energy recovery in SWRO

Danfoss iSave is a patented, high-efficiency Energy Recovery Device (ERD) that guarantees constant membrane feed in SWRO applications of any size – on land, at sea or on the move.

Product range

  • APP high-pressure pumps - Danfoss
    APP pumps

    The APP pumps are designed for SWRO in land-based and marine applications, offering the highest efficiency rates in the industry. The compact design, long service intervals and reliability of the APP makes it a first choice for small and medium-sized desalination plants.

  • APP S 674 high-pressure pumps - Danfoss
    APP S 674 pumps

    The APP S 674 pumps are designed for SWRO offshore applications, offering the highest efficiency rates in the industry - comes with API 674 and ATEX certification.

Related products

  • iSave energy recovery device - Danfoss
    Energy recovery devices for reverse osmosis applications

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


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Related solutions

  • Water desalination applications - Danfoss

    Due to 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. Danfoss is committed to supporting the desalination industry with energy efficient SWRO solutions. 

How it works

Case studies

Reverse osmosis case studies

Learn more where to use our APP pumps and iSave ERDs in reverse osmosis applications


Pump animation

Learn how an axial piston pump works in this video animation


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