RE 92060/01.2017, Bosch Rexroth AG
Features
▶ Control of pressure and flow
▶ Remote controlled optional
▶ Pressure controller for parallel operation optional
▶ Mechanical V
g min
− and V
g max
−limitation
▶ The special version enables mooring, swivel-through
operation, and decompression over the pump
Variable pump A4VSO, data sheet 92050
▶ For variable pump A4VSO series 1 and 3
▶ Open circuit
Controllers devices
DR, DP, FR and DFR for
Variable axial piston pump
A4VSO
RE 92060
Edition: 01.2017
Replaces: 04.2014
Contents
Ordering code – A4VSO 2
DR − pressure controller 3
DRG − remote controlled pressure controller 6
DP − pressure controller for parallel operation 11
DPF − with flow controller 16
FR/FR1 − flow controller 19
FRG/FRG1 − flow controller with remote
controlled pressure control 22
DFR/DFR1 − pressure-flow controller 25
General instructions 28
Bosch Rexroth AG, RE 92060/01.2017
2 DR, DP, FR and DFR | Controllers
Ordering code – A4VSO
Ordering code – A4VSO
01 02 03 04 05 06 07 08 09 10 11 12 13
A4VS O / –
Hydraulic fluid
01 For details see data sheet 92050
Axial piston unit
02 Swashplate design, variable
A4VS
Charge pump (impeller)
03 without charge pump (no symbol)
● ● ● ● ● ● ● ● ●
with charge pump (impeller)
only with port plate 25 (service line ports)
‒ ‒ ‒ ‒ ‒ ‒ ‒ ● ‒ L
Operating mode
04 Pump, open circuit
O
Size (NG)
05 Geometric displacement
40 71 125 180 250 355 500 750 1000
Control device
06 Pressure controller DR
● ● ● ● ● ● ● ● ● DR
1)
remote controlled DR G
● ● ● ● ● ● ● ● ● DRG
1)
Pressure control for parallel operation DP
● ● ● ● ● ● ● ● ● DP
1)
with flow control DP F
‒ ‒ ● ● ● ● ‒ ‒ ‒ DPF
Flow controller FR
● ● ● ● ● ● ‒ ‒ ‒ FR
with pressure control, remote controlled FR G
● ● ● ● ● ● ‒ ‒ ‒ FRG
FR no connection from X
F
to the tank FR 1
● ● ● ● ● ● ‒ ‒ ‒ FR1
FRG no connection from X
F
to the tank FRG 1
● ● ● ● ● ● ‒ ‒ ‒ FRG1
Pressure and flow controller DFR
● ● ● ● ● ● ‒ ‒ ‒ DFR
no connection from X
F
to the tank DFR 1
● ● ● ● ● ● ‒ ‒ ‒ DFR1
Series
07 Series 1, index 0
● ● ‒ ‒ ‒ ‒ ‒ ‒ ‒ 10
Series 3, index x
‒ ‒ ● ● ● ● ● ● ● 3x
For details see data sheet 92050
08 Direction of rotation
09 Seal
10 Drive shaft
11 Mounting flange
12 Service line ports
13 Through drive
●
= Available
‒
= Not available
1) Available in mooring and swivel-through operation on request
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DR − pressure controller
3
DR − pressure controller
The pressure controller limits the maximum pressure at the
pum
p outlet within the control range of the variable pump.
The variable pump only moves as much hydraulic fluid as is
required by the consumers. If the operating pressure
exceeds the pressure setting at the pressure control valve,
the pump will regulate to a smaller displacement to reduce
the control differential.
▶ Recommended setting range 50 to 350 bar.
350 bar is set as standard.
When ordering, please state other values in plain text.
▶ Initial position in depressurized state: V
g max
▶ Mechanical minimum and maximum swivel angle limita-
tion
– The V
g min
stop is set so that a pressure of 15 to
20bar is set when port B is plugged.
– The V
g max
stop is set to nominal V
g max
. When order-
ing, please state other settings values in plain text
(possible setting ranges V
g max
to 50 % V
g max
).
The pressure controller for mooring and swivel-through
operation is available on request. For decompression, the
pump swivels over zero in operation as a motor.
Remote controlled pressure control optionally available–
DRG see page6, pressure controller for parallel operation
DP see page11
▼ Static characteristic
350
q
v min
q
v max
50
Flow
Operating pressure p [bar]
≤ 3 bar
Pressure deviation
A4VSO - open circuit
▼ Flow direction S to B
Direction of rotation
Pump
Swiveling range
1)
High pressure port
clockwise left B
counter-clockwise right B
1)
cf. swivel angle indicator
15 0 15
right
left
Bosch Rexroth AG, RE 92060/01.2017
4 DR, DP, FR and DFR | Controllers
Ordering code – A4VSO
Dynamic characteristics
Load step by opening and closing a pressure line with a
pressure-relief valve as load valve 1 m after the connection
flange of the axial piston unit.
Swivel time t
Outward swivel time t
SA
Inward swivel time t
SE
100
300
200
350
0
400
V
g max
V
g min
Displacement
(swivel angle)
Operating pressure p [bar]
Note
Characteristics are measured median values at:
▶ n = 1500/1800 rpm
▶ Pressure safeguarding at 400 bar
Swivel times
NG
t
SA
[s]
against 20 bar
t
SA
[s]
against 330 bar
t
SE
[s]
zero stroke 350 bar
40 approx. 0.12 approx. 0.08 0.02
71 approx. 0.20 approx. 0.10 0.03
125 approx. 0.30 approx. 0.20 0.04
180 approx. 0.30 approx. 0.20 0.05
250 approx. 0.40 approx. 0.30 0.06
355 approx. 0.40 approx. 0.30 0.08
500 approx. 0.50 approx. 0.30 0.10
750 approx. 1.00 approx. 0.60 0.15
1000 approx. 1.50 approx. 0.90 0.20
The values of the outward swivel time t
SA
(V
g min
→ V
g max
)
can be shortened by the factor 2 to 3 if required (please
contact us).
This does not have any effect on the inward swivel time t
SE
.
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
Ordering code – A4VSO
5
DR schematics
Controller range (gray field) applicable for A4VSO
▼ Example A4VSO, sizes 40 and 71
R(L)TU S MS K1 K2
MB
B
1.1
B
1
2
▼ Example A4VSO, sizes 500 to 1000
R(L)TU S MS K1 K2
MB
B
1.1
B
1
M1
M2
2
3
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Pressure control valve
3 Intermediate plate (NG 125 to 1000)
▼ Example A4VSO, sizes 125 to 355
R(L)TU S M
S
K
1
K
2
M
1
M
2
M
B
B
1.1
B
1
2
3
Bosch Rexroth AG, RE 92060/01.2017
6 DR, DP, FR and DFR | Controllers
DRG − remote controlled pressure controller
DRG − remote controlled pressure controller
Function and equipment as for DR.
A pressure-relief valve (pos.4) can be piped externally at
port X
D
for remote control, although the pressure-relief
valve is not included in the scope of supply for the DRG
control.
Version with built-on valve on request.
The differential pressure at the pressure control valve
(pos.2) is set to 20 bar as standard, the quantity of control
liquid emerging at port X
D
is then approx. 1.5 l/min. If a
different setting (recommended range 20 to 50 bar) is
required, please state in plain text.
As a separate pressure-relief valve, we recommend:
▶ DBD 6 (hydraulic) as per data sheet 25402.
▶ DBETA-6X (elektrical) as per data sheet 29262.
The maximum wire length should not exceed 2 m.
Note for setting the remote controlled pressure control:
The setting value for the external pressure relief valve plus
the differential pressure value at the pressure control valve
determines the level of pressure control.
Example: External pressure relief valve 330 bar
Differential pressure at pressure
control valve 20 bar
Pressure control at 330 + 20 = 350 bar
Pressure deviation ≤ 3 bar
max.350
q
v min
q
v max
20
Operating pressure p [bar]
Flow
External pressure-
relief valve
Δp pressure control valve
For the function, description, and swivel times of the pres-
sure controller DR, see pages 3 and 4.
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DRG − remote controlled pressure controller
7
DRG schematics
Controller range (gray field) applicable for A4VSO
▼ Example A4VSO, sizes 40 and 71
R(L)TU S MS K1 K2
MB
B
1.1
B
1
2
XD
4
▼ Example A4VSO, sizes 500 to 1000
R(L)TU S MS K1 K2
MB
B
1.1
B
1
3
2
XD
M2
M1
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Pressure control valve
3 Intermediate plate (NG 125 to 1000)
4 External pressure-relief valve
(not included in the scope of supply)
▼ Example A4VSO, sizes 125 to 355
R(L)TU S MS M1 M2K1 K2
MB
B
1.1
B
1
3
2
XD
4
Bosch Rexroth AG, RE 92060/01.2017
8 DR, DP, FR and DFR | Controllers
DRG − remote controlled pressure controller
Dimensions [mm]
Dimensions DR / DRG
▼ A4VSO, sizes 40 and 71
15 15 0
Einschraubloch M33
B
R(L)
B
X
D
L
R
X
D
A8
A2
A1
A5
A7
A6
A3
A4
NG
1)
A1 A2 A3 A4 A5 A6 A7 A8
40 260 140 147 137 47 67 209 128 For detailed dimensions and technical data of the
variable pump, see data sheet 92050 (A4VSO)
71 298 157 142 142 42 72 236 144
Port Standard Size
2)
p
max abs
[bar]
3)
State
4)
X
D
(DRG) Pilot pressure remote control
pressurecontroller
DIN 3852 M14 x 1.5; 12 deep 400 O
X
D
(DR) X
1) For sizes 500 to 1000 see page 10
2) For notes on tightening torques, see the instruction manual
3) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
4) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Pressure control valve
Pressure control valve mounting
for clockwise rotation
(Pressure control valve mounting
for counter-clockwise rotation)
(X
D
for counter-clockwise
rotation)
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DRG − remote controlled pressure controller
9
Dimensions [mm]
▼ A4VSO, sizes 125 to 355
15 15 0
Einschraubloch M33
B
X
D
L
R
R(L)
B
X
D
M
1
(M
2
)
M
2
(M
1
)
A8
A2
A7
A1
A5
A6
(Pressure control valve mounting
for counter-clockwise rotation)
(X
D
for counter-clockwise rotation)
Pressure control valve mounting
for clockwise rotation
Intermediate plate
Pressure control valve
NG
1)
A
1
A
2
A
5
A
6
A
7
A
8
125/180 354 191 41 71 305 172 For detailed dimensions and technical data of the variable pump, see data
sheet 92050 (A4VSO)
250/355 424 238 41 71 367 208
Port Standard Size
2)
p
max abs
[bar]
3)
State
4)
X
D
(DRG) Pilot pressure remote control
pressure controller
DIN 3852 M14 x 1.5; 12 deep 400
O
X
D
(DR)
X
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
1) For sizes 500 to 1000 see page 10
2) For notes on tightening torques, see the instruction manual
3) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
4) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Bosch Rexroth AG, RE 92060/01.2017
10 DR, DP, FR and DFR | Controllers
DRG − remote controlled pressure controller
Dimensions [mm]
▼ A4VSO, sizes 500 to 1000
B
X
D
R(L)
B
X
D
M
1
(M
2
)
M
2
(M
1
)
A8
A2
A7
L
R
A1
A5
A6
15 15 0
Einschraubloch M33
Intermediate plate
Pressure control valve
(Pressure control valve mounting
for counter-clockwise rotation)
Pressure control valve mounting
for clockwise rotation
NG
1)
A
1
A
2
A
5
A
6
A
7
A
8
500 510 283 41 51 452 216 For detailed dimensions and technical data of the variable pump, see data
sheet 92050 (A4VSO)
750 582 322 41 51 484 235
1000 622 350 41 51 550 269
Port Standard Size
2)
p
max abs
[bar]
3)
State
4)
X
D
(DRG) Pilot pressure remote control pressure
controller
DIN 3852 M14 x 1.5; 12 deep 400 O
X
D
(DR) X
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep 400 X
1) For sizes 40 and 71 see page 8; for sizes 125 to 355 see page 9
2) For notes on tightening torques, see the instruction manual.
3) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
4) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
(X
D
for counter-clockwise rotation)
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DP − pressure controller for parallel operation
11
DP − pressure controller for parallel operation
Suitable for pressure control of multiple axial piston units
A4VS in parallel operation.
An external pressure-relief valve (pos. 4) actuates multiple
axial piston units together over ports X
D
. The respective
throttle valve (Pos. 5) provides the pressure increase pro-
portional to the current pump setting that is required for
parallel control.
▶ Initial position in depressurized state: V
g max
Differential pressure setting on the controller
The control valve (pos. 2) plus throttle valve (pos. 5) is set
to 33 bar when the X
D
port is relieved. The quantity of
control liquid emerging at port X
D
is then approx. 1.5 l/min.
The setting value for the external pressure relief valve plus
the basic setting of the controller determines the level of
pressure control.
▶ Adjustment range 33 to 350 bar
The pressure increase is retained independently of the
setting value of the external pressure-relief valve and
ensures the swivel angle deviation is low for all mutually
activated pumps.
Use the same as possible line lengths from ports X
D
to the
pressure-relief valve.
The pressure-relief valve (Pos. 4) is not included in the
scope of supply of the DP - please order separately.
▶ Recommendation:
DBD 6 (hydraulic) as per data sheet 25402
or DBETA-6x (elektrical) as per data sheet 29262 at
maximum 3 pumps.
▶ Mechanical minimum and maximum swivel angle limita-
tion
– The V
g min
stop is set so that a pressure of 15 to
20bar is set when port B is plugged.
– The V
g max
stop is set to nominal V
g max
. When ordering,
please state other settings requests in plain text (pos-
sible setting ranges
V
g max
to
50 % V
g max
).
The maximum number of pumps is limited by the output of
the used pressure-relief valve (pos. 4).
Single pumps can be relieved to the amount of the basic
setting by the relief valve (pos. 6) as required. A check valve
(pos. 7) is then additionally needed at the pressure port.
Both valves are not included in the scope of supply.
Special version with mounted relief valve (pos.6) is avail-
able on request.
The DP controller for mooring and swivel-through operation
is available on request. For decompression, the pump
swivels over zero in operation as a motor.
Swivel times as for DR, see page 4.
Flow control is optionally available – DPF see page 18
q
v min
q
v max
0
100%
10%
Swivel angle a
Flow
Swivel angle deviation ± 10 % from the setpoint value
▼ Static characteristic
q
v min
q
v max
350
33
Flow
Operating pressure
p [bar]
Δp = 6.5
±2
bar
A4VSO - open circuit
▼ Flow direction S to B
Direction of rotation
pump
Swiveling range
1)
High-pressure port
clockwise left B
counter-clockwise right B
1)
cf. swivel angle indicator
15 0 15
right
left
Bosch Rexroth AG, RE 92060/01.2017
12 DR, DP, FR and DFR | Controllers
DP − pressure controller for parallel operation
DP schematics
Controller range (gray field) applicable for A4VSO
▼ Example A4VSO, sizes 40 and 71
1.1
R(L)TU S MS K1 K2
B
B
1
MB
XD
2
2
5
7
6
5
7
6
4
1.1
R(L)TU S MS K1 K2
B
B
1
Mst
MB
XD
Mst
M2
M2
Connection
of further
axial piston
units
▼ Example A4VSO, sizes 125 to 355
1.1
R(L)TU S MS K1 K2
B
B
1
MB
XD
2
2
5
7
6
5
7
6
4
1.1
R(L)TU S MS K1 K2
B
B
1
Mst
MB
XD
Mst
M2
M2
Connection
of further
axial piston
units
Port
X
D
Pilot pressure pressure controller
M
St
Pilot pressure measurement
M1, M2 Measurement stroking chamber pressure (NG 125 to 1000)
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DP − pressure controller for parallel operation
13
▼ Example A4VSO, sizes 500 to 1000
R(L)TU S MS K1 K2
M2
R(L)TU S MS K1 K2
M1
M2
Mst
B
B
1
MB
MB
B
B
1
2
2
3
3
5
7
6
5
7
6
4
XD
XD
1.1
1.1
M1
Mst
Connection
of further
axial piston
units
Port
X
D
Pilot pressure pressure controller
M
St
Pilot pressure measurement
M1, M2 Measurement of stroking chamber pressure
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Control valve with pressure compensator
3 Intermediate plate (NG 500 to 1000)
4 Pressure-relief valve (not included in the scope of supply)
5 Throttle valve
6 Relief valve (not included in the scope of supply)
7 Check valve (not included in the scope of supply)
only required in combination with relief valve
Bosch Rexroth AG, RE 92060/01.2017
14 DR, DP, FR and DFR | Controllers
DP − pressure controller for parallel operation
Dimensions [mm]
Dimensions DP
▼ A4VSO, sizes 40 and 71
M14x1.50
M14x1.50
15 15 0
Einschraubloch M33
B
X
D
A7
A2
A6
2
1.1
R(L)
X
D
M
St
L
R
A1
A5
A3
B
A4
5
Schl.weite: 30 mm
(Control valve mounting
for counter-clockwise
rotation)
to flanging face
NG A
1
A
2
A
3
A
4
A
5
A
6
A
7
40 260 210 147 137 39 133 170 For detailed dimensions and technical data of the variable pump,
see data sheet 92050 (A4VSO)
71 225 225 142 142 39 155 187
125/180 354 261 – – 39 192 221
250/355 424 306 – – 39 237 268
Port Standard Size
2)
p
max abs
[bar]
3)
State
4)
X
D
Pilot pressure pressure controller DIN 3852 M14 x 1.5; 12 deep 400 O
M
St
Measurement of stroking chamber
pressure
DIN 3853 S8 shape W 400 X
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
Components, see page 13
▼ A4VSO, sizes 125 to 355
M14x1.50
M14x1.50
15 15 0
Einschraubloch M33
B
X
D
A7
A2
A6
2
1.1
5
3
R(L)
X
D
M
St
A1
A5
B
M
1
(M
2
)
M
2
(M
1
)
L
R
(Control valve mounting
for counter-clockwise
rotation)
to flanging face
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Control valve mounting
for clockwise rotation
Control valve mounting
for clockwise rotation
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DP − pressure controller for parallel operation
15
Dimensions [mm]
▼ A4VSO, sizes 500 to 1000
B
X
D
A7
A2
A6
2
1.1
5
3
M
St
M
St
R(L)
X
D
A1
A5
B
M
1
(M
2
)
M
2
(M
1
)
L
R
15 15 0
Einschraubloch M33
NG A
1
A
2
A
5
A
6
A
7
500 510 353 39 268 313 For detailed dimensions and technical data of the variable pump, see data sheet
92050 (A4VSO)
750 582 392 39 290 352
1000 622 419 39 349 379
Port Standard Size
1)
p
max abs
[bar]
3)
State
3)
X
D
Pilot pressure pressure controller DIN 3852 M14 x 1.5; 12 deep 400 O
M
St
Pilot pressure measurement DIN 3853 S8 shape W 400 X
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep 400 X
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Control valve with pressure compensator
3 Intermediate plate (NG 125 to 1000)
5 Throttle valve
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Control valve mounting
for clockwise rotation
(Control valve mounting for
counter-clockwise rotation)
to flanging face
Bosch Rexroth AG, RE 92060/01.2017
16 DR, DP, FR and DFR | Controllers
DPF − with flow controller
DPF − with flow controller
In addition to the pressure control function, a differential
pressure can be used to control the flow from the pumps,
e. g. by an orifice between the pump and consumer. The
pump supplies only the amount of fluid actually required by
the consumer.
The flow of the pump is then dependent on the cross sec-
tion of the external measuring orifice (pos. 9), which is
located between the pump and the consumer. The flow is
nearly independent of the load pressure below the setting
value of the pressure control and within the control range
of the pump.
For a description of the flow controller, see FR page 19.
For the function and technical data of the parallel pressure
controller DP, see page 11.
A4VSO - open circuit
▼ Static characteristic
q
v min
q
v max
350
33
Flow
Operating pressure
p [bar]
Δp = 6.5
±2
bar
▼ Flow direction S to B
Direction of rotation
pump
Swiveling range
1)
High-pressure port
clockwise left B
counter-clockwise right B
1)
cf. swivel angle indicator
15 0 15
right
left
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DPF − with flow controller
17
DPF schematics
▼ A4VSO, size 125 to 355
1.1
R(L)TU S MS K1 K2M1 M2
MB
B
B
1
XD
XF
3
5
7
5
7
8
2
3
8
2
9
1.1
R(L)TU S MS K1 K2M1 M2
MB
B
B
1
XD
XF
6
4
Mst
6
Mst
Connection
of further
pumps
Port
X
D
Pilot pressure pressure controller
X
F
Pilot pressure flow controller
M
St
Pilot pressure measurement
M1,
M2
Measurement of stroking chamber pressure
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Control valve with pressure compensator
3 Intermediate plate
4 Pressure-relief valve (not included in the scope of supply)
5 Throttle valve
6 Relief valve (not included in the scope of supply)
7 Check valve (not included in the scope of supply)
only required in combination with relief valve
8 Flow control valve
9 External measuring orifice (not included in the scope of
supply)
Bosch Rexroth AG, RE 92060/01.2017
18 DR, DP, FR and DFR | Controllers
DPF − with flow controller
Dimensions [mm]
Dimensions DPF
▼ A4VSO, size 125 to 355
15 15 0
Einschraubloch M33
B
X
D
A8
A2
A11
2
1.1
5
3
A9
A7
A11
8
X
F
A1
A5
A6
X
F
M
St
B
A12
X
D
R(L)
M
1
(M
2
)
M
2
(M
1
)
L
R
to flanging face
to flanging face
(Valve mounting for counter-
clockwise rotation)
Valve mounting for
clockwise rotation
to flanging face
NG A
1
A
2
A
5
A
6
A
7
A
8
A
9
A
10
A
11
A
12
125 354 261 41 71 191.5 172 345 220.5 371 39 For detailed dimensions and technical data
of the
variable pump
, see
data sheet 92050 (A4VSO)
180 354 261 41 71 191.5 172 345 220.5 371 39
250 424 306 41 51 236.5 208 407 267.5 433 39
355 424 306 41 51 236.5 208 407 267.5 433 39
Port Standard Size
1)
p
max abs
[bar]
2)
State
3)
X
D
Pilot pressure pressure controller DIN 3852 M14 x 1.5; 12 deep 400 O
X
F
Pilot pressure flow controller DIN 3852 M14 x 1.5; 12 deep 400 O
M
St
Pilot pressure measurement DIN 3853 S8 shape W 400 X
M
1
; M
2
Measurement of stroking
chamber pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
Components, see page 17
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
FR/FR1 − flow controller
19
FR/FR1 − flow controller
The flow controller adjusts the displacement of the pump
to the volume required by the consumer.
The flow of the pump is then dependent on the cross sec-
tion of the external measuring orifice (pos. 4), which is
located between the pump and the consumer. The flow is
nearly independent of the load pressure within the control
range of the pump (see maximum flow deviation below).
The opening cross section of the measuring orifice deter-
mines the flow of the pump.
The flow controller compares the pressure before the
measuring orifice with that after the orifice and maintains
the pressure drop encountered here (differential pressure
∆p) and thus controls the flow.
If the differential pressure ∆p increases, the pump is swiv-
eled back (towards V
g min
), if the differential pressure ∆p
decreases the pump is swiveled out (towards V
g max
), until
equilibrium in the valve is restored.
∆p
orifice
= p
pump
– p
consumer
The standard setting on the flow control valve (pos. 2) for
∆p is 14 bar. If a different setting (recommended range
14to 25 bar) is required, please state in plain text. Higher
values on request.
The stand-by pressure in zero stroke operation (sensing
orifice plugged) is slightly above the ∆p setting.
The DFR1 version has no connection from X
F
to the tank.
▶ Initial position in depressurized state: V
g max
▶ Mechanical minimum and maximum swivel angle limita-
tion
– The V
g min
stop is set so that a pressure of 15 to
20bar is set when port B is plugged.
– The V
g max
stop is set to nominal V
g max
. When ordering,
please state other settings requests in plain text
(possible setting ranges
V
g max
to
50 % V
g max
).
A4VSO - open circuit
▼ Static characteristic
Flow
350
0
14
q
v min
q
v max
min
max
Operating pressure p →
▼ Flow direction S to B
Direction of rotation
pump
Swiveling range
1)
High-pressure port
clockwise left
B
counter-clockwise right
B
1)
cf. swivel angle indicator
▼ Static characteristic at variable rotational speed
Flow q
v
Rotational speed n
▼ Max. flow deviation
measured at drive speed n = 1500 rpm
Size 40 71 125 180 250 355
∆p
v
[l/min]
3 3 5 6 8 10
15 0 15
right
left
Bosch Rexroth AG, RE 92060/01.2017
20 DR, DP, FR and DFR | Controllers
FR/FR1 − flow controller
▼ Dynamic characteristic
The characteristics are measured median values.
Flow step standby / q
v max
through relief of the X port to
the tank.
25
75
50
0
100
100
300
200
350
50
400
Displacement V
g
[%]
Load pressure
[bar]
Standby
Outward swivel time t
SA
Inward swivel time t
SE
Swivel time t
Swivel times
NG
t
SA
[s]
standby...350 bar
t
SE
[s]
350 bar...standby
t
SE
[s]
50 bar...standby
40 approx. 0.1 0.02 0.050
71 approx. 0.2 0.03 0.075
125 approx. 0.3 0.04 0.100
180 approx. 0.4 0.05 0.120
250 approx. 0.4 0.06 0.150
355 approx. 0.5 0.07 0.180
The values of the outward swivel time t
SA
(V
g min
→ V
g max
)
can be shortened by the factor 2 to 3 if required (please
contact us).
This does not have any effect on the inward swivel time t
SE
.
FR/FR1 schematics
▼ A4VSO, sizes 40 and 71
1.1
R(L)TU S MS K1 K2
B
B
1
MB
XF
2
4
B
for FR1
plugged
Port
X
F
Pilot pressure flow controller
M1, M2 Measurement stroking chamber pressure (NG 125 to 355)
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Flow control valve
3 Intermediate plate (NG 125 to 355)
4 External measuring orifice (not included in the scope of
supply)
▼ A4VSO, sizes 125 to 355
1.1
R(L)TU S MS K1M1 M2
B
B
1 MB
XF
B
3
2
4
K2
for FR1
plugged
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
FR/FR1 − flow controller
21
Dimensions [mm]
Dimensions FR/FR1
▼ A4VSO, sizes 40 and 71
M14x1.50
M14x1.50
15 15 0
Einschraubloch M33
B
A8
A1
2
1.1
A7
X
F
A2
A5
A6
X
F
B
R(L)
L
R
A3
A4
Schl.weite: 30 mm
(Valve mounting
for counter-clock-
wise rotation)
to flanging face
NG A1 A2 A3 A4 A5 A6 A7 A8
40 260 140 147 137 47 67 209 128 For detailed dimensions and technical data of the variable
pump, see data sheet 92050 (A4VSO)
71 298 157 142 142 42 72 236 144
125/180 354 191 – – 41 71 305 172
250/355 424 238 – – 41 71 367 208
Port Standard Size
1)
p
max abs
[bar]
2)
State
3)
X
F
Pilot pressure flow controller DIN 3852 M14 x 1.5; 12 deep 400
O
M
1
; M
2
Measurement of stroking
chamber pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
▼ A4VSO, size 125 to 355
M14x1.50
M14x1.50
15 15 0
Einschraubloch M33
B
2
1.1
X
F
3
A8
A7
A2
A1
A5
A6
X
F
B
R(L)
L
R
M
1
(M
2
)
M
2
(M
1
)
(Valve mounting for coun-
ter-clockwise rotation)
to flanging face
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Valve mounting for
clockwise rotation
Valve mounting for
clockwise rotation
(X
F
for counter-
clockwise rotation)
(X
F
for counter-
clockwise rotation)
Bosch Rexroth AG, RE 92060/01.2017
22 DR, DP, FR and DFR | Controllers
FRG/FRG1 − flow controller with remote controlled pressure control
FRG/FRG1 − flow controller with remote controlled pressure control
The FRG pressure flow controller is a combination of FR
(FR1) and DRG.
The flow control is overridden by a pressure control that is
controlled by a separate pressure-relief valve (pos. 4).
For the function and technical data of the remote con-
trolled pressure control, see page 7.
For the function and technical data of the FR flow control-
ler, see pages 19 and 20.
The FRG1 version has no connection from X
F
to the tank.
A4VSO - open circuit
▼ Characteristic
Flow
350
0
20
q
v min
q
v max
min
max
Operating pressure p [bar]
▼ Flow direction S to B
Direction of rotation
Pump
Swiveling range
1)
High-pressure port
clockwise left
B
counter-clockwise right
B
1)
cf. swivel angle indicator
15 0 15
right
left
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
FRG/FRG1 − flow controller with remote controlled pressure control
23
▼ A4VSO, sizes 40 and 71
1.1
R(L)TU S MS K1 K2
B
B
1
MB
XF
XD
5
2
6
4
B
for FRG1
plugged
Port
X
D
Pilot pressure remote control pressure controller
X
F
Pilot pressure flow controller
M1, M2 Measurement stroking chamber pressure (NG 125 to 355)
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Flow control valve
3 Intermediate plate (NG 125 to 355)
4 External measuring orifice (not included in the scope of
supply)
5 Pressure control valve
6 External pressure control valve (not included in the scope
of supply)
▼ A4VSO, sizes 125 to 355
1.1
R(L)TU S MS K1 K2M1 M2
B
B
1
MB
B
X
F
XD
3
5
2
6
4
for FRG1
plugged
Bosch Rexroth AG, RE 92060/01.2017
24 DR, DP, FR and DFR | Controllers
FRG/FRG1 − flow controller with remote controlled pressure control
Dimensions [mm]
Dimensions FRG/FRG1
▼ A4VSO, sizes 40 and 71
15 15 0
Einschraubloch M33
B
A8
A2
A10
2
1.1
5
A9
A7
X
F
X
D
X
F
X
D
B
A1
A5
R(L)
L
R
A4
A3
A6
Schl.weite: 30 mm Schl.weite: 30 mm
to flanging face
to flanging face
Valve mounting for
clockwise rotation
(Valve mounting for counter-
clockwise rotation)
to flanging face
▼ A4VSO, size 125 to 355
15 15 0
Einschraubloch M33
B
A8
A2
A10
2
1.1
5
A9
A7
X
F
X
D
3
A1
A5
A6
X
D
B
R(L)
M
1
(M
2
)
M
2
(M
1
)
L
R
X
F
to flanging face
to flanging face
Valve mounting for
clockwise rotation
(Valve mounting for counter-
clockwise rotation)
to flanging face
NG A1 A2 A3 A4 A5 A6 A7 A8 A9 A10
40 260 140 147 137 47 67 209 128 249 275 For detailed dimensions and technical data
of the variable pump, see data sheet 92050
(A4VSO)
71 298 157 142 142 42 72 236 144 276 302
125/180 354 191 – – 41 71 305 172 345 371
250/355 424 238 – – 41 71 367 208 407 433
Port Standard Size
1)
p
max abs
[bar]
2)
State
3)
X
D
Pilot pressure remote control pressure
controller
DIN 3852 M14 x 1.5; 12 deep 400 O
X
F
Pilot pressure flow controller DIN 3852 M14 x 1.5; 12 deep 400 O
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
Components, see page 23
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
(X
D
and X
F
for
counter-clock-
wise rotation)
(X
D
and X
F
for counter-
clockwise rotation)
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DFR/DFR1 − pressure-flow controller
25
DFR/DFR1 − pressure-flow controller
The DFR pressure and flow controller DFR is a combination
of the DR pressure controller and FR flow controller.
For the function and technical data, see DR (page 3) and
FR (page 19).
The DFR1 version has no connection from X
F
to the tank.
▶ Initial position in depressurized state: V
g max
▶ Mechanical minimum and maximum swivel angle limita-
tion
– The V
g min
stop is set so that a pressure of 15 to
20bar is set when port B is plugged.
– The V
g max
stop is set to nominal V
g max
. When ordering,
please state other settings requests in plain text
(possible setting ranges
V
g max
to
50 % V
g max
).
A4VSO - open circuit
▼ Static characteristic
350
q
v min
q
v max
50
Operating pressure p [bar]
Flow
Pressure deviation ≤ 3 bar
▼ Flow direction S to B
Direction of rotation
pump
Swiveling range
1)
High-pressure port
clockwise left
B
counter-clockwise right
B
1)
cf. swivel angle indicator
15 0 15
right
left
Bosch Rexroth AG, RE 92060/01.2017
26 DR, DP, FR and DFR | Controllers
DFR/DFR1 − pressure-flow controller
DFR/DFR1 schematics
▼ A4VSO, sizes 40 and 71
1.1
R(L)TU S MS K1 K2
B
B
1
MB
XF
B
5
2
4
for DFR1
plugged
Port
X
F
Pilot pressure flow controller
M1, M2 Measurement stroking chamber pressure (NG 125 to 355)
Components
1 Pump with hydraulic control device
1.1 A4VSO (see data sheet 92050)
2 Flow control valve
3 Intermediate plate (NG 125 to 355)
4 External measuring orifice (not included in the scope of
supply)
5 Pressure control valve
▼ A4VSO, sizes 125 to 355
1.1
R(L)TU S MS K1 K2M1 M2
B
B
1 MB
XF
B
5
3
2
4
for DFR1
plugged
RE 92060/01.2017, Bosch Rexroth AG
Controllers | DR, DP, FR and DFR
DFR/DFR1 − pressure-flow controller
27
Dimensions [mm]
Dimensions DFR/DFR1
▼ A4VSO, sizes 40 and 71
15 15 0
Einschraubloch M33
B
A8
A2
2
1.1
5
A9
A7
X
F
X
F
B
A1
A5
R(L)
A4
A3
A6
L
R
Schl.weite: 30 mm Schl.weite: 30 mm
to flanging face
Valve mounting for
clockwise rotation
(Valve mounting for counter-
clockwise rotation)
to flanging face
▼ A4VSO, size 125 to 355
15 15 0
Einschraubloch M33
B
A8
A2
2
1.1
A9
A7
X
F
3
5
A1
A5
A6
B
R(L)
M
1
(M
2
)
M
2
(M
1
)
L
R
X
F
to flanging face
Valve mounting for
clockwise rotation
(Valve mounting for
counter-clockwise
rotation)
to flanging face
NG A1 A2 A3 A4 A5 A6 A7 A8 A9
40 260 140 147 137 47 67 249 128 275 For detailed dimensions and technical data of the
variable pump, see data sheet 92050 (A4VSO)
71 298 157 142 142 42 72 276 144 302
125/180 354 191 – – 41 71 345 172 371
250/355 424 238 – – 41 71 407 208 433
Port Standard Size
1)
p
max abs
[bar]
2)
State
3)
X
F
Pilot pressure flow controller DIN 3852 M14 x 1.5; 12 deep 400 O
M
1
; M
2
Measurement of stroking chamber
pressure
DIN 3852 M14 x 1.5; 12 deep (NG 125 and 180)
M18 x 1.5; 12 deep (NG 250 and 355)
400 X
X
1) For notes on tightening torques, see the instruction manual
2) Momentary pressure spikes may occur depending on the application.
Keep this in mind when selecting measuring devices and fittings.
3) O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
28
Bosch Rexroth AG, RE 92060/01.2017
Bosch Rexroth AG
Mobile Applications
An den Kelterwiesen 14
72160 Horb a.N., Germany
Tel. +49 7451 92-0
info.ma@boschrexroth.de
www.boschrexroth.com/brm
© Bosch Rexroth AG 2017. All rights reserved, also regarding any disposal,
exploitation, reproduction, editing, distribution, as well as in the event of
applications for industrial property rights. The data specified within only
serves to describe the product. No statements concerning a certain condi-
tion or suitability for a certain application can be derived from our informa-
tion. The information given does not release the user from the obligation of
own judgment and verification. It must be remembered that our products are
subject to a natural process of wear and aging.
DR, DP, FR and DFR | Controllers
Project planning notes
Project planning notes
▶ The A4VSO axial piston variable pump is designed to be
used in open circuit.
▶ The project planning, installation and commissioning of
the axial piston unit requires the involvement of quali-
fied skilled personnel.
▶ Before using the axial piston unit, please read the corre-
sponding instruction manual completely and thoroughly.
If necessary, these can be requested from Bosch
Rexroth.
▶ Before finalizing your design, please request a binding
installation drawing.
▶ The specified data and notes contained herein must be
observed.
▶ Depending on the operating conditions of the axial
piston unit (working pressure, fluid temperature), the
characteristic curve may shift.
▶ Preservation: Our axial piston units are supplied as
standard with preservative protection for a maximum of
12 months. If longer preservative protection is required
(maximum 24 months), please specify this in plain text
when placing your order. The preservation periods apply
under optimal storage conditions, details of which can
be found in the data sheet 90312 or the instruction
manual.
▶ Not all versions of the product are approved for use in a
safety function pursuant to ISO13849. Please consult
the responsible contact person at Bosch Rexroth if you
require reliability parameters (e.g. MTTF
d
) for functional
safety.
▶ Depending on the type of control used, electromagnetic
effects can be produced when using solenoids. When a
direct current is applied, solenoids do not cause electro-
magnetic interference nor is their operation impaired by
electromagnetic interference.
Other behavior can result when a modulated direct
current (e.g. PWM signal) is applied. Potential electro-
magnetic interference for persons (e.g. persons with a
pacemaker) and other components must be tested by
the machine manufacturer.
▶ Pressure controllers are not protection against overpres-
sure. A pressure relief valve is to be provided for the
hydraulic system.
▶ Working ports:
– The ports and fastening threads are designed for the
specified maximum pressure. The machine or system
manufacturer must ensure that the connecting ele-
ments and lines correspond to the specified applica-
tion conditions (pressure, flow, hydraulic fluid, tem-
perature) with the necessary safety factors.
– The working ports and function ports are only
intended to accommodate hydraulic lines.
Safety instructions
▶ During and shortly after operation, there is a risk of
getting burnt on the axial piston unit and especially
onthe solenoids. Take appropriate safety measures
(e.g. by wearing protective clothing).
▶ Moving parts in control equipment (e.g. valve pistons)
can, under certain circumstances get stuck in position
as a result of contamination (e.g. impure hydraulic fluid,
abrasion, or residual dirt from components). As a result,
the hydraulic fluid flow and the build-up of torque in the
axial piston unit can no longer respond correctly to the
operator’s specifications. Even the use of various filter
elements (external or internal flow filter) will not rule
out a fault but merely reduce the risk. The machine/
system manufacturer must test whether remedial mea-
sures are needed on the machine for the application
concerned in order to set the consumer being driven to
a safe position (e.g. safe stop) and if necessary to
ensure it is properly implemented.