Danfoss 180B3032 APP 3.5 High Pressure Pump
Keeping a reverse osmosis system running smoothly comes down to having a pump that can handle demanding fluids without wearing out. The Danfoss 180B3032 APP 3.5 is built exactly for that job. It's an axial piston pump designed to move low viscosity, corrosive liquids like seawater and brackish water under high pressure, which makes it a natural fit for desalination plants and salt water treatment systems that need consistent, dependable output.
What sets this pump apart is its self-lubricating design. Because the fluid being pumped also lubricates the moving internal parts, there's no need for separate oil lubrication, which simplifies maintenance and reduces the chance of contamination in sensitive water treatment processes. The duplex stainless steel construction adds another layer of durability, helping the pump resist corrosion even after years of exposure to salt water. Combined with a built-in flushing valve that lets water pass through when the pump is idle, this design helps protect internal components between duty cycles.
For operators running continuous desalination or RO filtration processes, the APP 3.5 offers steady, predictable performance since flow is directly tied to shaft speed rather than fluctuating with pressure changes. That kind of consistency, paired with a compact and lightweight build, makes it a practical choice for facilities that need reliable high pressure pumping without adding unnecessary bulk to their equipment layout.
Key Features
- Axial piston, positive displacement design
- Fluid-lubricated internals, no oil lubrication required
- Duplex stainless steel construction for corrosion resistance
- Integrated flushing valve for idle-state protection
- Compact, lightweight build
- Designed to EN 809 standards
Applications
- Seawater reverse osmosis (SWRO) desalination
- Brackish water treatment systems
- High pressure salt water pumping
- Low viscosity, corrosive fluid handling
- RO feed water pressurization
Specifications
- Part Number: 180B3032
- Model: APP 3.5
- Max Flow: 15.51 GPM / 59.65 L/min
- Max Outlet Pressure: 83 barg / 1200 psig
- Max Speed: 3000 rpm
- Min Speed: 700 rpm
- Body Material: Duplex Stainless Steel
- Port Size: 3/4 inch BSPP (inlet and outlet, threaded)
- ATEX Compliance: No
Frequently Asked Questions
Q: What type of fluid is the Danfoss 180B3032 designed to pump?
A: It's designed for low viscosity, corrosive fluids such as seawater and brackish water, commonly used in desalination and reverse osmosis applications.
Q: Does the APP 3.5 pump require external lubrication?
A: No, the pump uses the fluid being pumped to lubricate its internal moving parts, eliminating the need for separate oil lubrication.
Q: What is the maximum operating pressure of this pump?
A: The pump reaches a maximum outlet pressure of 83 barg, or approximately 1200 psig.
Q: What material is the pump body made from?
A: The 180B3032 is constructed from duplex stainless steel, chosen for its strength and resistance to corrosion in salt water environments.
Q: Is the flow rate consistent regardless of pressure changes?
A: Yes, as a positive displacement pump, flow is proportional to shaft speed and pump displacement, staying consistent regardless of counter-pressure.
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