See how APP pumps achieve industry-leading efficiency and what it means for performance, energy use, and applications.
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Discover energy-efficient APP pumps and energy recovery devices for reverse osmosis. Explore the full Danfoss range, compare solutions, and access technical information, application guidance, and customer examples.
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Get more from every kWh
APP pumps reduce lifecycle cost in demanding RO applications worldwide. Connect with our experts to see how high- efficiency pumps can optimize your system.
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If you are not operating near ~92% efficiency, you are paying for avoidable energy losses every day.
An 80% efficient pump loses 20% of input energy. At 92% efficiency, losses drop to just 8%. That is not a 12% improvement – it is ~60% less energy wasted.
Because energy represents up to ~65% of plant operating cost, this difference compounds over time. The result is a fundamentally lower cost structure – typically millions in avoided energy spend over 20 years.
Danfoss APP reduces these losses at the source, delivering a structurally lower cost per m³ in real operation.
In many RO applications, water production is critical infrastructure where downtime is a direct operational risk.
Compared to conventional high-pressure pump systems, APP reduces maintenance complexity with fewer moving parts, no belts, and the pumped medium acting as the lubricant. This eliminates external lubrication and reduces wear.
Available in Duplex, Super Duplex, and ceramic materials, APP pumps are built for aggressive, high-pressure environments. Service intervals up to 8,000 hours and major overhauls up to 25,000 hours reduce interventions. Smaller, lighter units enable easy on-site service, lowering downtime risk and ensuring predictable operation.
RO systems rarely operate at a single design point. Flow, pressure, and demand vary over time. APP pumps decouple flow and pressure, maintaining high efficiency across real operating conditions.
Modular parallel APP arrays allow capacity to be staged up or down without efficiency loss. Compared to single large pump systems, this improves part-load performance, provides built-in redundancy, and enables continued operation during service.
Compact APP units have a small footprint and can be installed vertically or horizontally, simplifying layout in space-constrained containerized and marine systems. The result is a more flexible, scalable system with stable performance and lower lifecycle cost.
Product range
Discover our range of APP pumps for small train sizes between 14 and 250 m3/day. Choose between more sizes or configure in parallel to scale up flexibly. Visit our product store for more information and technical literature.
Discover our range of APP pumps for small to medium train sizes between 250 and 1,000 m3/day. Choose between more sizes or configure in parallel to scale up flexibly. Visit our product store for more information and technical literature.
Discover our range of APP pumps for medium to large train sizes between 1,000 to 2,200 m3/day. Choose between more sizes or configure in parallel to scale up flexibly. Visit our product store for more information and technical literature.
Related products
With a 3-in-1 design that integrates highly effective isobaric pressure exchangers with positive displacement booster pumps and electrical motors, the active iSave ERDs deliver big energy savings in small spaces.
With its integrated pressure exchanger and motor, the MPE 70 is an active ERD designed for medium and large desalination plants when configured in parallel. The active design reduces mixing, biofouling and rotor overspin.
Field-proven APP efficiency and reliability, enhanced with ceramic components for the toughest feed conditions.
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Case stories
In a world-first, the large-scale, multi-stage plant integrates Hyrec’s osmotically assisted reverse osmosis (OARO) system after the seawater reverse osmosis (SWRO) system to significantly reduce the size and workload of its evaporator and crystallizer. Both stages rely on Danfoss APP pumps and iSave ERDs, minimizing CAPEX, OPEX and green house gas emissions.
When a Spanish engineering company needed one compact, reliable, and energy-efficient SWRO solution for three separate end users, Gefico’s engineers proposed a compact, modular train design that could be both containerized and built on skids. Danfoss’s ceramic APP pumps and iSave ERDs are at the heart of the seven trains that Gefico designed and produced.
When the owners of a hotel and commercial center complex situated on the historic harbor front decided to install their own SWRO plant to increase their water resilience, the brief was simple but demanding: maximize water output in as little space and as efficiently as possible. Danfoss high-pressure pumps and ERDs compact energy efficiency are at the heart of the solution.
As land-based aquaculture continues to grow, the demand for energy-efficient and reliable seawater reverse osmosis (SWRO) is expanding rapidly. Norwater, a global leader in SWRO for aquaculture and marine applications, is meeting this need with modular systems built around high-performance components from Danfoss.
WatMan Engineering chose Danfoss high-pressure pumps and energy recovery devices as key components in the SWRO plants developed for Royal Caribbean’s Icon Class, the world’s largest cruise ships. Beginning with Icon of the Seas, the same four-train SWRO configuration has been implemented across the vessels in the series delivered to date and those currently under construction.
Metis Water chose Danfoss APP pumps and iSave ERDs for its mobile 1,000 m3/day SWRO plant. Designed to fit inside a 40 ft container, the plug-and-play solution can quickly be deployed to supply fresh water in emergency situations – reliably and energy efficiently.