Robust, energy-efficient high-pressure pumps for industrial wastewater treatment
As water reuse and recycling grow alongside stricter environmental controls, companies and utilities increasingly turn to liquid discharge (ZLD) and minimum liquid discharge (MLD) to treat industrial wastewater. And because ZLD based solely on traditional thermal processes is highly energy intensive, membrane processes using reverse osmosis (RO) have emerged as an essential part of ZLD. Indeed, studies show that RO pre-treatment can reduce ZLD’s overall energy consumption by up to 75%.
Danfoss APP pumps are particularly well-suited for such RO treatments. Due to their unparalleled efficiency rates of up to 92%, they reduce OPEX and emissions significantly compared to other high-pressure pump technologies. Moreover, this efficiency remains the same regardless of varying pressure rates up to 120 bar, and operators can depend on their field-proven history of simple maintenance and long service intervals. The new APP pumps with ceramics makes the Danfoss portfolio of reliable, energy efficient high-pressure pumps for wastewater treatment ideal for even more use cases. Monitoring system available for all APP pumps with ceramics.
Features and benefits
World-class efficiency - up to 90% at all operation points
Low complexity with few moving parts
Easy to operate and maintain
The pump is oil-free to avoid contamination
Easy scalability when coupled in parallel
Made of first-class Duplex steel to prevent corrosion in aggressive environments
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.
High-pressure pumps delivering up to 90% efficiency
With efficiency rates up to 90% at all operating points, the Danfoss APP W HC pumps are designed to produce the highest level of efficiency in ZLD (zero liquid discharge) and MLD (minimal liquid discharge) applications. The strong and extremely robust pumps are made of non-corrosive materials and guarantee high reliability and low operational costs over the service life.
The pumps are positive displacement pumps with axial pistons that move a fixed amount of water in each cycle. Flow is proportional to the number of shaft revolutions (rpm). Unlike centrifugal pumps, the APP W HC pumps produce the same flow at a given speed no matter what the discharge pressure.
The simple pump design allows easy installation, inspection, and maintenance. Furthermore, the pump operates without oil to prevent contamination. The pumps can be parallel-coupled in trains to fulfill the required capacity at any time.
Pump animation
The axial piston pump has a simple design with only a few parts.
Learn how the pump works in this video animation.
Product range
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APP W HC 15-30 high-pressure pump
Pressure range: Max outlet pressure: 120 barg/1,740 psig
Min. inlet pressure: 2-5 barg/29-72.5 psig
Flowrange: 11-30 m3/h - 48-132 gpm
Speed: 500-1,200 rpm -
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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
Save energy with a membrane-based process
ZLD/MLD systems can be operated with different processes. A way to reduce energy consumption is to use a membrane-based process.
Documents
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Promotion material | APP high-pressure pumps with ceramics: Robust energy efficiency for demanding membrane technologies | English | Multiple | 02 Mar, 2025 | 1.4 MB | |
| Article | APP pump now with ceramics for energy efficient SWRO and wastewater treatment | English | Multiple | 05 Dec, 2023 | 1.1 MB | |
| Data sheet | APP W HC 15-24 Pumps Data sheet | Chinese (CN) | China | 10 Apr, 2019 | 1.2 MB | |
| Data sheet | APP W HC 15-30 Pumps Data sheet | English | Multiple | 22 Oct, 2019 | 753.5 KB | |
| Brochure | Save water, time and money with the new Danfoss APP W HC pump | English | United States | 16 Jan, 2019 | 1.9 MB | |
| Brochure | Save water, time and money with the new Danfoss APP W HC pump | English | Multiple | 16 Jan, 2019 | 1.9 MB |
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