Danfoss RSA 28, RSA 40, RSA 60, RSA 95, RSA 125 Data sheet

Data sheet

Oil Pump Type RSA Size 28, 40, 60, 95, 125

Application RSA oil pumps are designed for small/medium

sized domestic and commercial oil burners up to
255 l/h.
The pumps have a built-in pressure regulator
with shut-off function.
A special regulation spring is available for feed/
transfer applications.

Function

Features

• Light oil and Kerosene

• 1 or 2-pipe operation

• 1-stage

• Built-in pressure regulator with shut-off

• Ring filter

• Spec. spring available for feed/transfer
applications

Pressure Suction Return

From the suction inlet (S) oil is drawn through the
gear set, where the pressure is increased. By
means of the piston and the spring in the pressure
regulator the pressure is kept constant at the value
set on adjustment screw (P1).
In 2-pipe systems the excess oil is led back to the
return outlet (R). In 1-pipe systems with plugged
return outlet (R) and removed by-pass screw (A),
the oil is returned internally to the gear set (see
figure).
When the pump is stopped the pressure drops
and the spring force in the pressure regulator will
move the piston until it seats and the oil flow is
shut off effectively.

Bleeding

In 2-pipe systems the pumps are self-priming, i.e.
bleeding is performed via the constriction (O) to
the return outlet (R).

In 1-pipe systems wi th plugged return outlet (R) and
by-pass screw (A) removed, bleeding must be
performed through the pressure gauge port (Pn).
In 1-pipe systems with underlying tank, the closing
function of the regulating valve must be rendered
inoperative. This is made by connecting the nozzle
line to the pressure gauge port (Pn) and plug the
pressure port (P). In this application a cut-off valve
must be installed in the nozzle line.

Warranty

For pumps used outside the stated technical data
and used with oil containing abrasive particles
Danfoss cannot give any warranty.

© Danfoss | 2020.08

AI055186452291en-000305 | 1

Data sheet Oil Pump Type RSA Size 28, 40, 60, 95, 125

Identification Example:

RSA 60

Nozzle capacity at 4.3 cSt., 10 bar, 2800 min-1.

28 = Capacity 46 l/h
40 = Capacity 75 l/h
60 = Capacity 120 l/h
95 = Capacity 184 l/h
125 = Capacity 255 l/h

Technical data

RSA 28 40 60 95 125

Oil types Kerosene, standard fuel gas oil and bio fuels
Viscosity range (measured

in suction inlet)

1.3 - 75 cSt. (mm²/s)

Filter area / mesh 75 cm² / 150 μm 170 cm² / 150 μm
Pressure range, stage 5.5-15 bar 5.5-21 bar
Factory setting 7 ±1 bar 10 ±1 bar
Max. pressure in suction

inlet/return outlet

Speed

2400-3450

-1

min

4 bar

1400-3450 min

-1

Max. starting torque 0.20 Nm 0.22 Nm 0.24 Nm 0.30 Nm 0.35 Nm
Ambient temperature –20 to +120 °C
Storage temperature –25 to +120 °C
Temperature of medium –10 to +120 °C
Neck / Flange EN 225

Nozzle capacity Operating torque Power consumption

2 | © Danfoss | 2020.08

AI055186452291en-000305