Fixed displacement
radial piston pump
IN
O
UT
Radial piston pumps type PFR
fixed displacement
PFR are fixed displacement radial
piston pumps with positive drive con-
struction of the pistons (without
return spring) for high performance
and low noise level.
Suitable for hydraulic oils according to
DIN 51524... 535 or synthetic fluids
having similar lubricating characteri-
stics.
These pumps are available as single or
with through-shaft configuration in
order to be coupled to PFE vane
pumps, see table A190.
Wide range of displacements from
1,7 up to 25,4 cm
3
/rev.
Max pressure up to 350/500 bar.
1 MODEL CODE
A045
Additional suffix for pumps provided to be coupled with
vane pump type PFE (tab. A005), see section
9
Only for PFR-3:
XA = provided (throughgoing shaft, flange and joint)
to be coupled with PFE-31
XB = provided (throughgoing shaft, flange and joint)
to be coupled with PFE-41
XC = provided (throughgoing shaft, flange and joint)
to be coupled with PFE-51
See table A190 for codes of complete multiple pumps:
PFR +PFE = PFRX*E
Displacement [cm
3
/rev], see section
2
for PFR-2: 02, 03
for PFR-3: 08, 11, 15
for PFR-5: 18, 25
Series number
(1) Max pressure is 250 bar for /PE versions; max pressure is 175 bar for water glycol fluid
(2) Max speed is 1000 rpm for /PE version and for water glycol fluid
(3) Flow rate and power consumption are proportional to rotation speed
PFR-2
Conventional size, see section
2
:
2, 3, 5
seat of delivery valve
inlet port
outlet port
Model
PFR-202 1,7 2,4 0,7 2,4 1,1 2,4 1,6 2,4 2,1
PFR-203 3,5 5,0 1,4 5,0 2,2 4,9 3,0 4,9 4,2
PFR-308 8,2 11,8 3,2 11,5 5,6 11,5 7,5 - -
PFR-311 11,4 16,5 4,5 16,4 7,8 16,2 10 - -
PFR-315 14,7 21,3 6,3 21,3 10,0 20,9 12,5 - -
PFR-518 18,1 26 7,7 25,8 12,3 25,6 15,2 - -
PFR-525 25,4 36,5 11 36 17,3 35,5 21,6 - -
500 (1)
350 (1)
Speed range
rpm
150 bar
(3)
l/min kW
250 bar (3)
l/min kW
350 bar (3)
l/min kW
500 bar (3)
l/min kW
Displacement
cm
3
/rev
Max pressure
bar
OPERATING CHARACTERISTICS at 1450 rpm (based on mineral oil ISO VG 46 at 50°C)2
600-1800
(2)
Seals material:
omit for NBR (mineral
oil & water glycol)
PE = FPM
T
able
A045-11/E
body
central bearing and return plates
radial pistons
shaft
PFR XA 3 08 **
*
--
Installation position
Commisioning
Loads on the shaft
A
mbient temperature from -20°C to +70°C
Fluid Hydraulic oil as per DIN 51524...535; for other fluids see section
1
Recommended viscosity
max at cold start 800 mm
2
/s
max at full power 100 mm
2
/
s
during operation 24 mm
2
/
s
min at full power 10 mm
2
/s
Fluid contamination class ISO 4401 class 21/19/16 NAS 1638 class 10 (filters at 25 µm value with ß25 ≥ 75 recommended)
Fluid temperature -20°C +60°C -20°C +50°C (water glycol) -20°C +80°C (/PE seals)
R
ecommended pressure on inlet port from -0,1 to 1,5 bar for speed up to 1800 rpm
3
MAIN CHARACTERISTICS OF FIXED DISPLACEMENT RADIAL PISTON PUMP TYPE PFR
4
TORQUE VERSUS PRESSURE DIAGRAM
Operating pressure [bar]
Torque needed to operate the pump [Nm]
Operating pressure [bar]
Noise level [dB (A)]
5 NOISE LEVEL
A
ny position. If the pump is installed in vertical position, it is advisable to install on the outlet pipe
a
proper valve for air bleeding (consult our technical dept.). They are not self-priming therefore
their installation under oil level is recommended. Installation above oil level requires foot valve on
inlet line and pump central point located no more than 150 mm above minimum oil level.
T
he shaft of the pump has an eccentric cam which rotates with the shaft generating the stroke of
t
he pistons and thus generating the flow rate. For best functioning a balanced coupling should
b
e provided between the shaft of the motor and the shaft of the pump. See section
10
P
FR pumps can be reversed without changing the flow direction. Therefore both directions of rotation
a
re permitted.
It is recommend to start the pump by short impulses, with pump case filled and air bleed plugs
unlocked.
Pumps type PFR-3 and PFR-5 have 2 air bleeds, normally plugged, ports located near to the P ports.
T
o help filling and air bleeding, it could be advisable to install a vertical pipe connected on the intake
l
ine, just before the inlet port flange.
Axial and radial loads are not allowed on the shaft. The coupling should be sized to absorb the
developed peak horsepower.
5
25
5
18
315
3
11
3
08
2
03
2
02
Ambient noise levels measured in compliance with ISO 4412-1 oleohydraulics -Test procedure to define the ambient noise level - Pumps
Shaft speed: 1450 rpm. Mineral oil ISO VG 46 at 50°C.
WFA-32 42,5 34 58,72 79 30,18 68 12 4 ø 11,5 4150 M10x35
PFR - 2 WFA-25 35,5 29 52,37 70 26,19 55 12 4 ø 11 4131 M10x30
6
LIMIT OF SHAFT TORQUE
PFR-2 200 =
PFR-3 600 320
PFR-5 800 320
Pump
model
M
aximum driving torque [Nm] Maximum torque available on the end of the through shaft [Nm]
The values of torque needed to operate the pumps are shown for each type on the "torque versus pressure diagram" at section 4.
I
n multiple pumps the total torque applied to the shaft of the first element (drive shaft) is the sum of the single torque needed for operating each single
pump and it is necessary to verify that this total torque applied to the drive shaft is not higher than the values indicated in the table.
(•) SAE flanges are supplied with the pump
8 SAE-3000 FLANGES supplied with the pump [mm]
PFR - 3
PFR - 5
Pump model Flange code A B C D E F H L M OR Screws
Flanges are supplied with seal and screws M10 class 12.9
Tightening torque = 70 Nm
A045
Model Mass kg
PFR-518
38
PFR-525
7 DIMENSIONS OF SINGLE PUMPS [mm]
PFR-2
PFR-3
PFR-5
Mass: 12 Kg
Mass: 31 Kg
INLET
Plugged port
for air bleed
OUTLET
OUTLET
G
1/2”
G 1/2”
Spanner 32
SAE flange
SAE flange
INLET
spanner 36
M
8
d
ep
t
h
17
M14
d
ep
t
h
20
INLET
SAE flange
Plugged port
for air bleed
OUTLET
M
14
d
ep
t
h
20
spanner 41
OUT
L
ET
O
UT
L
ET
G
1
/2
”
G
1/
2”
G 3/8”
Note: PFR-206 have 5 pistons in the same size
9
DIMENSIONS OF PUMPS PROVIDED TO BE COUPLED WITH VANE PUMPS [mm]
11/17
1
0 BALANCED COUPLING
The balanced couplings permit to minimize the vibrations caused by the unbalanced mass during the pump rotation.
The couplings listed in the table, supplied by Atos, must be used together with the relevant bell housing (supplied by Scoda). The table lists the codes
o
f the Atos balanced couplings and the Scoda bell housing, available for the several pumps and for the standardized sizes of the electrical motors.
P
FRXA-3 PFRXB-3 PFRXC-3
PFR-202
UNEL-MEC 100-112 Y-GB-82/02 Y-LS4P2
UNEL-MEC 132 Y-GB-122/02 Y-LS6P2
PFR-203
UNEL-MEC 100-112 Y-GB-82/03 Y-LS4P2
UNEL-MEC 132 Y-GB-122/03 Y-LS6P2
PFR-308
UNEL-MEC 100-112 Y-GB-83/08 Y-LS4P3
UNEL-MEC 132 Y-GB-123/08 Y-LS6P3
UNEL-MEC 160 Y-GB-303/08 Y-LS7P3
PFR-311
UNEL-MEC 100-112 Y-GB-83/11 Y-LS4P3
UNEL-MEC 132 Y-GB-123/11 Y-LS6P3
UNEL-MEC 160 Y-GB-303/11 Y-LS7P3
PFR-315
UNEL-MEC 100-112 Y-GB-83/15 Y-LS4P3
UNEL-MEC 132 Y-GB-123/15 Y-LS6P3
UNEL-MEC 160 Y-GB-303/15 Y-LS7P3
PFR-518
UNEL-MEC 132 Y-GB-125/18 Y-LS6P5
UNEL-MEC 160 Y-GB-305/18
Y-LS7P5
UNEL-MEC 180 Y-GB-605/18
PFR-525
UNEL-MEC 132 Y-GB-125/25 Y-LS6P5
UNEL-MEC 160 Y-GB-305/25
Y-LS7P5
UNEL-MEC 180 Y-GB-605/25
PUMP MODEL ELECTRICAL MOTOR BALANCED COUPLING BELL HOUSING
