Danfoss RSA Fuel Pumps — Reliable Delivery Under Any Conditions
The Danfoss RSA fuel pump series is used in small and medium-sized domestic burners with fuel consumption up to 255 L/h. Danfoss RSA pumps feature an integrated pressure regulator with shut-off function and support both single- and two-pipe systems.
Purpose and Key Features
RSA pumps are suitable for light fuel oil and kerosene. Thanks to a built-in spring, they can be used not only in burners, but also as transfer or feed pumps. The internal regulator maintains constant pressure, and when the pump stops, it shuts off the fuel flow automatically.
Technical Specifications
| Parameter | Sizes 28 / 40 | Sizes 60 / 95 / 125 |
|---|---|---|
| Flow rate (L/h) | up to 75 | up to 255 |
| Viscosity range | 1.3–75 cSt | |
| Pressure range | 5.5–15 bar | 5.5–21 bar |
| Factory pressure setting | 7 ±1 bar | 10 ±1 bar |
| Shaft rotation speed | 2400–3450 rpm | 1400–3450 rpm |
| Fuel temperature | –10 to +70 °C | |
| Ambient temperature | –20 to +70 °C | |
| Storage temperature | –25 to +70 °C | |
Working Principle
Fuel is drawn in through the inlet line and pressurized via the internal gear mechanism. In two-pipe systems, excess fuel returns to the tank; in one-pipe systems, it’s redirected to a bypass. When the pump stops, the built-in spring pushes the piston to shut the pressure line and fully stop fuel flow.
Advantages of Danfoss RSA
- Supports single- and two-pipe operation
- Integrated pressure regulator with shut-off
- Suitable for light and high-viscosity fuels
- Reliable performance and long service life
Danfoss RSA pumps are ideal for a wide range of domestic burner systems and ensure stable, secure fuel delivery. See all pumps and accessories in our Boilers24 catalog.