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High-pressure pumps for reverse osmosis applications

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Highly energy efficient and reliable 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, now also available with ceramics, is oil-free, using only water for lubrication. Most pumps for RO systems can be delivered with ATEX and API 674 approvals.

Danfoss APP pumps for reverse osmosis systems are available from 0.6 m3/h to 92 m3/h. All APP pumps are available with and without motors. Monitoring system available for all APP pumps from 21 m3/h and higher.

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

Calculate the number and sizes of high-pressure pumps required for your application and discover how much energy you can save.

APP pump selection tool
APP pump selection tool
Customer collaboration contributes to pump innovation

Customer collaboration contributes to pump innovation

Danfoss developed its latest APP high-pressure pump with ceramics in close cooperation with customers, including Veolia Water Technologies and TEMAK. Read our latest article to learn how demanding field tests help ensure reliability.

Download article
Follow our blog

Follow our blog

Danfoss is dedicated to engineering energy efficient solutions. Our blog explores issues related to energy and cost efficiency in seawater reverse osmosis.

Read our blog

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.

Download brochure
Containerized SWRO plant
Energy-efficient SWRO in challenging conditions just got simpler

The new APP pumps with ceramics enables SWRO operators in even more places to achieve unrivaled energy efficiency and simpler maintenance. Pre-filtration requirements are now even lower.

Download leaflet

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.

Energy
Energy

With efficiency rates up to 92%, the APP pump technology offers the highest efficiency in the industry.

Maintenance
Maintenance

The simple construction of the pump offers reliable operation with long service  intervals and easy maintenance.

Footprint
Footprint

The small and compact size of the pump allow flexible configuration in almost any environment.

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.

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.

Learn more
isave erd brochure

Product range

APP D Pumps
APP D Pumps

APP D 30-38 high-pressure pump with ceramic
Pressure range: Max outlet pressure: 83 barg/1,200 psig
Min. inlet pressure: 2-5 barg/29-72.5 psig
Flow range: 18-38 m3/h – 79.7-167.3 gpm
Speed: 700-1,500 rpm

APP 16-22 high pressure pump - Danfoss
APP 16-22 high pressure pump

Pressure range: Max outlet pressure: 80 barg/1,160 psig
Min. inlet pressure, inlet: 2-5 barg/29-72.5 psig
Flow range: 13.3-21.9 m3/h - 58.6-96.4 gpm
Speed: 700 to 1,500 rpm

APP 5.1-10.2 high pressure pump - Danfoss
APP 5.1-10.2 high pressure pump

Pressure range: Max outlet pressure: 80 barg/1,160 psig
Min. inlet pressure, inlet: 0.5-5 barg/7.3-72.5 psig
Flow range: 1.9-10.7 m3/h - 8.4-47.1 gpm
Speed: 700 to 1,800 rpm

APP 53-86 high pressure pump- Danfoss
APP 53-92 high pressure pump

Pressure range: Max outlet pressure: 80 barg/1,160 psig
Min. inlet pressure, inlet: 2-5 barg/72.5 psig
Flow range: 24-92 m3/h – 106-405 gpm
Speed: 700 to 1,780 rpm

APP 0.6-1.5 high pressure pump - Danfoss
APP 0.6-1.0 high pressure pump

Pressure range: Max outlet pressure: 80 barg/1,160 psig
Min. inlet pressure, inlet: 0.5-5 barg/7.3-72.5 psig
Flow range: 0.2-1.3 m3/h - 0.9-5.7 gpm
Speed: 700 to 3,450 rpm

Case stories

Reverse osmosis case studies

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

Go to case story overview