RE58032/2022-02-02, BoschRexrothAG
Proportional pressure reducing valve,
direct operated, increasing characteristic
curve FTDRE 2 K
RE58032/2022-02-02
Replaces: 2021-09-17
ContentsFeatures
▶ Direct-operated proportional pressure reducing valve
for reducing system pressure
▶ Cartridge valve
▶ Suitable for mobile and industrial applications
▶ Actuation via proportional solenoid
▶ In case of power failure, minimum pressure is set
▶ Recommended control electronics:
Mobile amplifier type RA and RC
▶ Size 2
▶ Series 4X
▶ Maximum control pressure 18, 30bar
▶ Maximum working pressure 100bar
▶ Maximum flow (at ∆p=7bar)
– 18 bar 2l/min
– 30bar 2.5l/min
Contents
Type code 2
Preferred types 2
Functional description 3
Technical data 4
Characteristic curves 6
Permissible working range 7
Dimensions 8
Mounting cavity 9
Available individual components 10
Related documentation 11
Bosch Rexroth AG, RE58032/2022-02-02
2 FTDRE 2 K | Proportional pressure reducing valve
Type code
Type code
01 02 03 04 05 06 07 08 09 10 11
FTDRE 2 K 4X / A V –8 *
Valve type
01 Proportional pressure reducing valve, non-standard design, electrical actuation
FTDRE
02 Size 2
2
03 Cartridge valve
K
Series
04 Series 40 to 49 or 4A to 4Z (unchanged installation and connection dimensions)
4X
Maximum control pressure
05 18 bar
18
30 bar
30
06 Proportional solenoid, switching in oil
A
Supply voltage
07 Control electronics 12VDC
G12
Control electronics 24VDC
G24
Manual override
08 With manual override
No code
Without manual override
N0
Electrical connection
1)
09 Device connector 2-pin, DT 04-2P (DEUTSCH)
K40
Device connector 2-pin, JuniorTimer (AMP)
C4
Sealing material
10 FKM (fluorocarbon rubber)
V
11 Further details in plain text
*
Notice
For valve types other than those listed in the datasheet,
consultation is required!
Preferred types
Type Material no.
FTDRE 2 K4X/18AG12C4V-8 R901545990
FTDRE 2 K4X/18AG12K40V-8 R901545993
FTDRE 2 K4X/18AG24C4V-8 R901545987
FTDRE 2 K4X/18AG24K40V-8 R901545991
FTDRE 2 K4X/18AG12N0C4V-8 R901545587
FTDRE 2 K4X/18AG12N0K40V-8 R901545589
FTDRE 2 K4X/18AG24N0C4V-8 R901545586
FTDRE 2 K4X/18AG24N0K40V-8 R901545588
Type Material no.
FTDRE 2 K4X/30AG12N0C4V-8 R901163327
FTDRE 2 K4X/30AG12N0K40V-8 R901163511
FTDRE 2 K4X/30AG24N0C4V-8 R901163577
FTDRE 2 K4X/30AG24N0K40V-8 R901163136
1) Plug-in connectors are not included in the scope of delivery and
must be ordered separately, see datasheet08006.
RE58032/2022-02-02, Bosch Rexroth AG
3 Proportional pressure reducing valve | FTDRE 2 K
Functional description
Functional description
General
The proportional pressure reducing valve type FTDRE 2 K
is adirect-operated cartridge valve in 3-way version.
It reduces the control pressure (portA) proportional
to the solenoid current and works largely independently
from the inlet pressure (portP).
Minimum pressure is set in case of power failure or
if the setpoint value is 0. The actuation takes place via
aproportional solenoid. The inside of the solenoid is
connected with the port T and filled with hydraulic fluid.
With these valves, the system pressure can be reduced
continuously depending on the electrical setpoint value.
The valve is suitable for actuating couplings, pumps and
directional valves, as well as for use in proportional pilot
controls (particularly in the mobile area, but also for
industrial applications).
Basic principle
The valve regulates the pressure in portA proportionally
to the current on the solenoid.
The proportional solenoid (1) converts the electric
current into mechanical force that acts on the control
spool (2) via the anchor. The control spool controls the
connection between the main ports.
Notice
▶ Occurring tank pressure (portT) is added to the
control pressure (portA).
▶ In an uninstalled state or in asystem that is not
vented completely, the valve must not be energized,
as the entering air otherwise has asignificant
negative effect on the dynamic behavior of the valves.
▼ Section and symbol
1 2
T
A
P
P T
A
Manual override
1)
A=Control pressure port
P=Pump port
T=Tank port
1) Not in Version "N0". Actuated by pin tool.
Connector must be removed to actuate manual override
(versions "C4" and "K40"). Maximum number of matings is 10
(Specification AMP 108-18013).
Bosch Rexroth AG, RE58032/2022-02-02
4 FTDRE 2 K | Proportional pressure reducing valve
Technical data
Technical data
General
Weight (approx.) kg 0.16
Installation position Any; the position of the electrical connection should
preferably be hanging down (with the valve in horizontal
position or with the electrical connection pointing
upwards, aminimum counter-pressure must be generated
so that the valve remains filled with oil).
Ambient temperature range °C –30 … +120
Salt spray test according to ISO9227 h 600 (NSS test)
Solenoid surface protection Coating according to ISO 19598-Fe//ZnNi with thick film
passivation
Hydraulic
Maximum control pressure PortA p
A
bar 18, 30
Maximum inlet pressure
PortP
p
E
bar 100
Counter-pressure PortT p
T
bar Depressurized (max. 30 bar)
Counter-pressure increases set pressure,
even when current I=0A
Flow (∆p=7bar) P → A q
V min
l/min ≥ 2 (18 bar version)
≥ 2.5 (30 bar version)
q
V max
l/min 7.5
Maximum leakage flow PortT q
L
cm
3
/min ≤ 60 (p
E
=50bar; control current I=0A)
Pilot flow Minimum cm
3
/min 100
Maximum cm
3
/min 600
(p
E
=50bar, q
vA
= 0l/min; control current I=I
max
)
Hydraulic fluid See table on page 5
Hydraulic fluid temperature range
ϑ
°C –30 … +120
Viscosity range
ν
mm²/s 10 … 380
Maximum admissible degree of contamination of hydraulic fluid,
cleanliness level as per ISO4406 (c)
Level 20/18/15
1)
Load cycles 10 mil.
Maximum step response during control current change
(see characteristic curve below)
t
on
ms ≤ 40
t
off
ms ≤ 20
Mesh width mesh filter element PortP µm 180
▼ Maximum step response
18
0 0 %
100 %
95 %
5 %
100
0
Pressure p
A
[bar]
Control current I [%]
Time t
t
on
t
off
1) Cleanliness levels specified for the components must be
maintained in the hydraulic systems. Effective filtration prevents
malfunctions and simultaneously extends the service life of
the components.
We recommend afilter with aminimum retention rate of β
10
≧75.
RE58032/2022-02-02, Bosch Rexroth AG
5 Proportional pressure reducing valve | FTDRE 2 K
Technical data
Electric
Voltage type DC voltage
Supply voltage
U
V 12 24
Maximum control current
2)
I
max
mA 1800 800
Coil resistance Cold value at 20°C
R
Ω 2.4 12
Duty cycle % See characteristic curves on pages7
Maximum coil temperature
3)
°C 150
Type of protection
according to ISO20653
Connector version "C4" IP6K5
4)
IP6K7 and IP6K9K
4)
(only with Rexroth plug-in connector, material no. R901022127)
Connector version "K40" IP6K7 and IP6K9K
4)
Control electronics (separate order) Type RA... analog amplifier (data sheet 95230)
BODAS controller
(data sheets 95204, 95205, 95206)
PW modulation
5)
Hz 150
Design according to VDE0580
Notice
▶ For applications outside these values, please
consult us!
▶ The technical data was determined at aviscosity of
ν=32mm
2
/s (HLP32; ϑ
oil
=40±5°C).
Notice
For the electrical connection, aprotective earth (PE
)
connection is mandatory based on the specification.
Hydraulic fluid
Hydraulic fluid Classification Suitable
sealing materials
Standards Data sheet
Mineral oils HL, HLP FKM DIN 51524 90220
Environmentally
acceptable
insoluble in water HEES FKM ISO15380 90221
Soluble in water HEPG FKM ISO15380 90221
Notice
▶ Further information and details on using other
hydraulic fluids are available in the above datasheets
or on request.
▶ Restrictions are possible with the technical valve data
(temperature, pressure range, service life,
maintenance intervals, etc.)!
▶ The flash point of the hydraulic fluid used must be
40K above the maximum solenoid surface
temperature.
▶ Environmentally acceptable: If environmentally
acceptable hydraulic fluids are used that are also
zinc-dissolving, there may be an accumulation of zinc.
2) Observe working temperatures, see characteristic curves on
page7
3) Due to the occurring surface temperatures of the solenoid coils,
the standards ISO13732-1 and ISO4413 must be observed!
4) With assembled and locked plug-in connector
5) The PWM frequency shall be optimized in accordance
with the application.
The operating temperature range is to be observed.
Bosch Rexroth AG, RE58032/2022-02-02
6 FTDRE 2 K | Proportional pressure reducing valve
Characteristic curves
Characteristic curves
p-I characteristic curves with tolerance band
▼ Control pressure 18bar
0.1 0.2
0.2
0
2
4
5.3
20.2
18.2
3.3
6
8
10
12
14
16
22
20
18
1.2
0.3
0.36
0.4
0.4 1.4
0.5 0.6
0.6
0.7 0.8
0.8
24 V
12 V 1.6 1.81 2
Control current I [A]
Set pressure p
A
at port A [bar]
Notice
Characteristic curves measured with HLP32, ϑ
oil
=40±5°C.
Measuring conditions
Amplifier RA analog amplifier (Data Sheet 95230)
PW modulation Hz 150
Inlet pressure bar 50
Dead volume at control pressure port A ml 135
▼ Control pressure 30bar
0.09 0.18
0.20
5
7.7
33.0
30.0
4.3
18.8
22.2
10
15
20
35
30
25
1.2
0.27 0.36
0.4 1.4
0.44 0.63
0.6
0.72 0.8
0.8
24 V
12 V 1.6 1.81.0
0.30
0.67
0.58
1.3
Control current I [A]
Set pressure p
A
at port A [bar]
RE58032/2022-02-02, Bosch Rexroth AG
7 Proportional pressure reducing valve | FTDRE 2 K
Permissible working range
Permissible working range
Minimum terminal voltage on the coil and relative duty cycle depending on the ambient temperature
Version "G12"
▼ Control pressure 18 and 30 bar, (U =12V; R
nom
=2.4Ω; I
max
=1.8A)
3
1
2
-30 30-20 20-10 10 50
50
40 60
60
80
80
70
70
90
90
110 120
110
100
100
1.6
1.65
1.75
1.7
1.8
1.9
1.85
0
0
1
2
3
4
5
6
7
8
9
10
11
12
Ambient temperature[°C]
(1) Minimum required voltage on the coil [V]
(3) Permissible continuous power supply [A]
at 100% duty cycle
1)
(2) Relative duty cycle [%] for I
max
(1.8 A)
Version “G24”
▼ Control pressure 18 and 30 bar, (U =24V; R
nom
=12Ω; I
max
=0.8A)
3
1
2
-30 30-20 20-10 10 50
50
40 60
60
80
80
70
70
90
90
110 120
110
100
100
0
0.6
0.65
0.75
0.7
0.8
0.9
0.85
0
2
4
6
14
8
18
10
22
20
16
24
12
Ambient temperature[°C]
(1) Minimum required voltage on the coil [V]
(3) Permissible continuous power supply [A]
at 100% duty cycle
1)
(2) Relative duty cycle [%] for I
max
(0.8 A)
1) Duty cycle (DINVDE0580): S3 xx% 10 min.
(xx see diagram (2) relative duty cycle)
Bosch Rexroth AG, RE58032/2022-02-02
8 FTDRE 2 K | Proportional pressure reducing valve
Dimensions
Dimensions [mm]
Dimensions
▼ FTDRE 2 K with screw-in thread
⌀26.5±0.3
1
8.5 6
+1
0
17.4±0.2
25.5±0.2
⌀12f7
⌀14f7
M18×1.5
⌀25
⌀28.6+0.2
DIN475-SW27-1
26.6±0.3
⌀4
13.2±0.347.5±0.5
2.2+0.1
1
3
4
5
T
A
P
2
1 Device connector"K40"
(separate order, see datasheet08006)
2 Device connector"C4"
(separate order, see datasheet08006)
3 Hexagon nut AF27; tightening torque M
A
= 15Nm ±10%
Notice
Aluminum, steel and casting as block material.
Make sure that a minimum yield point of
R
p0.2
≥240N/mm
2
is applied.
4 Mesh filter 180 μm
5 Manual override (not in Version "N0").
Actuated by pin tool. Connector must be removed to actuate
manual override (versions "C4" and "K40"). Maximum number of
matings is 10 (Specification AMP 108-18013).
A=Control pressure port
P=Pump port
T=Tank port
RE58032/2022-02-02, Bosch Rexroth AG
9 Proportional pressure reducing valve | FTDRE 2 K
Mounting cavity
Dimensions [mm]
Mounting cavity
⌀0.05
⌀0.05
⌀0.01
0.05
0.01
-0.2 +0.2
⌀0.01
M18x1.5
Ø12H8
(+0.027)
R0.1+0.1
Ø14H8
(+0.027)
(Ø25.5)
3; 4)
min. Ø26
45°±5°
15°±1°
E
E
0.0025–/Pt 10
20°±1°
2)
30°±1°
2)
Ø19.85±0.05
min. 9
max. 0.7
max. 11.4
6)
min. 18
1)
21.5-0.2
min. 26
1)
min. 27
13.4±0.1
(11.5)
5)
(13.4)
min. Ø11.68
min. Ø2.9
min. Ø13.68
2.4+0.1
Ø3
9.9±0.2
Ø2.5
18.8±0.1
A
A B
A B
A B
A B
5)
A
5)
5)
A
P
T
“X”
“X”
“Y”
“Y”
B
3)
0.0025–/Pt 10
Rz2 max 8
Rz2 max 8
Rz1 8
Rz1
max
8
C
0.0025–/Pt 10
Standards:
Workpiece edges ISO13715
Shape and position tolerance ISO1101
General tolerances for machining ISO2768-mK
Tolerance ISO8015
Surface finish ISO1302
1) Depth of fit
2) All seal ring insertion faces are rounded and free of burrs
3) Required roughness up to Ø25.5mm
4) Required evenness up to Ø25.5mm
5) Required roughness from 11.5 ... 13.4mm
6) Stepped beveling available
Bosch Rexroth AG, RE58032/2022-02-02
10 FTDRE 2 K | Proportional pressure reducing valve
Available individual components
Available individual components
▼ FTDRE 2 K with screw-in thread
999
Position Denomination Material no.
999 Seal kit of the valve (FKM) R961007179
RE58032/2022-02-02, Bosch Rexroth AG
11 Proportional pressure reducing valve | FTDRE 2 K
Related documentation
Related documentation
▶ Control electronics:
– Analog amplifier Type RA… Datasheet95230
– BODAS controller Type RC… Datasheets 95204, 95205, 95206
▶ Mineral oil-based hydraulic fluids Data sheet 90220
▶ Environmentally acceptable hydraulic fluids Data sheet 90221
▶ MTTF
D
values Data sheet 90294
Bosch Rexroth AG, RE58032/2022-02-02
Bosch Rexroth AG
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97816 Lohr am Main
Germany
Phone +49 9352 18-0
www.boschrexroth.com
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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
condition or suitability for acertain application can be derived from our
information. 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.
12 FTDRE 2 K | Proportional pressure reducing valve
Related documentation