RE 58038, edition: 2014-04, Bosch Rexroth AG
▶ Frame size 4
▶ Component series 1X
▶ Maximum control pressure 18, 30 bar
▶ Maximum operating pressure 100 bar
▶ Maximum flow 5 l/min (at ∆p = 7 bar)
Proportional pressure reducing valve
Features
▶ Direct operated proportional pressure reducing valve
for reducing a system pressure
▶ Cartridge valve
▶ Suitable for mobile and industrial applications
▶ Operation by means of proportional solenoid
▶ In case of power failure, the minimum pressure is set
▶ Recommended control electronics:
Mobile amplifier type RA and RC
RE 58038
Edition: 2014-04
Replaces: 04.99
H7980
Type FTDRE4K
Contents
Features 1
Ordering code, valve types 2
Function, section, symbols 3
Technical data 4, 5
Characteristic curves with tolerance band 6
Admissible working range 7
Dimensions 8
Mounting cavity 9
Available individual components 10
More information 10
Inhalt
Features 1
Ordering code (valve without coil)
1) 2
Valve types 2
Function, section, symbols 3
Technical data
(For applications outside these parameters, please consult
us!) 4
Technical data
(For applications outside these parameters, please consult
us!) 5
Characteristic curves with tolerance band
(measured with HLP46,
oil
= 40 ± 5 °C) 6
Admissible working range
Minimum terminal voltage at the coil and relative duty
cycle 7
Dimensions
(dimensions in mm) 8
Mounting cavity
(dimensions in mm) 9
Available individual components 10
More information 10
Notes 11
Notes 12
2/10 FTDRE4K | Proportional pressure reducing valve
Bosch Rexroth AG, RE 58038, edition: 2014-04
Ordering code (valve without coil)
1)
01 Proportional pressure reducing valve, non-standardized design, electrical operation FTDRE
02 Size 4 4
03 Screw-in cartridge valve K
04 Component series 10 to 19 (10 to 19; unchanged installation and connection dimensions) 1X
05 Maximum control pressure 18 bar 18
Maximum control pressure 30 bar 30
06 Proportional solenoid, wet-pin A
Supply voltage
07 Control electronics 12 V DC G12
Control electronics 24 V DC G24
08 With manual override no code
Without manual override N0
Electrical connection
1)
09 Without mating connector, with DT 04-2P connector (Deutsch plug) K40
Without mating connector, with AMP Junior-Timer connector C4
Seal material
10 FKM seals V
Observe compatibility of seals with hydraulic fluid used! (Other seals upon request)
11 Further details in the plain text *
01 02 03 04 05 06 07 08 09 10 11
FTDRE 4 K 1X / A V -8 *
Type Material no.
FTDRE 4 K1X/30AG12C4V-8 R901060306
FTDRE 4 K1X/30AG12K40V-8 R901082420
FTDRE 4 K1X/30AG24C4V-8 R900727801
FTDRE 4 K1X/30AG24K40V-8 R900771731
Type Material no.
FTDRE 4 K1X/30AG12N0C4V-8 R901377829
FTDRE 4 K1X/30AG12N0K40V-8 R901377830
FTDRE 4 K1X/30AG24N0C4V-8 R901377824
FTDRE 4 K1X/30AG24N0K40V-8 R901377826
Valve types
1)
Mating connectors, separate order, see data sheet 08006.
Notice:
For other valve types than those listed in the data sheet, please
consult us!
Proportional pressure reducing valve | FTDRE4K 3/10
RE 58038, edition: 2014-04, Bosch Rexroth AG
Function, section, symbols
General
The proportional pressure reducing valve type FTDRE 4K
is a direct operated screw-in cartridge valve in 3-way
version. It reduces the control pressure (main port
1
)
proportionally to the solenoid current and functions largely
independently from the inlet pressure (main port
2
).
With a command value of 0 or in case of power failure, the
minimum pressure is set. Operation is effected by means
of a proportional solenoid. The solenoid's interior is con-
nected to the main port
3
and filled with hydraulic fluid.
Depending on the electric command value, these valves
can be used to reduce the system pressure continuously.
The valve is suitable for controlling couplings, pumps and
directional valves as well as for use in proportional pilot
controls (particularly in the mobile area, however also for
industrial applications).
Basic principle
The valve controls the pressure in the main port
1
propor-
tionally to the current at the solenoid.
The proportional solenoid (1) converts the electric current
into a mechanical force that acts on the control spool (2)
via the armature. The control spool controls the connec-
tion between the main ports.
Notices:
▶ Occurring tank pressure (main port
3
) is added up
to the control pressure (main port
1
).
▶ If the valve is not installed or installed in a system
that is not completely bled, the valve must not be
energized as otherwise, the entering air has a very
negative effect on the valve’s dynamic behavior.
1
= Main port 1 (A)
2
= Main port 2 (P)
3
= Main port 3 (T)
Manual override
1)
1)
Not contained in "N0" version. Operation by pin tool, to operate
the manual override, the connector must be disconnected ("C4"
and "K40" version). Maximum number of plug-in processes 10
(specification AMP 108-18013).
Type FTDRE 4 K3X/..C4..
4/10 FTDRE4K | Proportional pressure reducing valve
Bosch Rexroth AG, RE 58038, edition: 2014-04
Technical data
(For applications outside these parameters, please consult us!)
1)
Rexroth standard test condition (HLP32;
oil
= 40 °C ± 5 °C)
2)
The cleanliness classes specified for the components must be
adhered to in hydraulic systems. Effective filtration prevents
faults and at the same time increases the life cycle of
thecomponents.
For the selection of the filters see www.boschrexroth.com/filter.
We recommend using a filter with a minimum retention rate
ofß
10
≧ 75.
hydraulic
Maximum control pressure
▶ Main port
1
(A)
bar 18, 30
Maximum inlet pressure
▶ Main port
2
(P)
bar 100
Maximum counter pressure
▶ Main port
3
(T)
bar Depressurized (maximum admissible 30)
Counter pressure increases set pressure, even for current I = 0
Flow (∆p = 7 bar)
1)
l/min ≥ 5 (maximum admissible 7.5)
Maximum leakage flow
▶ Main port
3
(T)
cm
3
/min ≤ 100 (p
P
= 100 bar and control current I = 0)
Maximum pilot flow cm
3
/min ≤ 350 (p
P
= 100 bar, q
V A
= 0 and control current I = I
max
)
Hydraulic fluid See table page 5
Hydraulic fluid temperature range °C –30 … +80
Viscosity range mm
2
/s 10 … 380
Maximum admissible degree of contamination of the hydraulic fluid,
cleanliness class according to ISO 4406 (c)
Class 20/18/15
1)
Load cycles 5 million
1)
Maximum step response in case of control
current change (see characteristic
curvebelow)
▶ t
on
ms 40
▶ t
off
ms 20
Mesh size strainer element at the main port
2
µm 160
general
Weight kg Approx. 0.19
Installation position Any; preferably with electrical connection hanging down (for hori-
zontal position of valve or electrical connection standing up, a min-
imum counter pressure must be generated to ensure the valve re-
mains filled with oil).
Ambient temperature range ▶ Version "18" °C –30 … +120
▶ Version "30" °C –30 … +120
Salt spray test according to ISO 9227 h 600 (NSS test)
Surface protection Solenoid
Coating according to DIN 50962-Fe//ZnNi with thick film passivation
Notice:
▶ The following documentation must be observed:
64020-B1 Hydraulic valves for mobile applications
▶ When exchanging screw-in cartridge valves, provide for the
correct tightening torque!
t
on
t
off
Pressure p
A
in bar
→
Control current in %
→
Maximum step response
Proportional pressure reducing valve | FTDRE4K 5/10
RE 58038, edition: 2014-04, Bosch Rexroth AG
3)
Due to the surface temperatures of the solenoid coils, the
standards ISO 13732-1 and ISO4413 need to be adhered to!
4)
The chopper frequency is to be optimized depending on
theapplication.
In this regard, observe the working temperature range of
theapplication.
electric
Voltage type Direct voltage
Supply voltages V 12 DC 24 DC
Maximum solenoid current mA 1800 800
Coil resistance (cold value at 20 °C) Ω 2.4 12
Duty cycle % 100
See characteristic curves page 7.
Maximum coil temperature
3)
°C 150
Protection class according to VDE 0470-1
(DIN EN 60529)
DIN 40050-9
▶ Version "C4" IP 65 with mating connector mounted and locked
IP 67 and IP 69K with Rexroth mating connector (material no.
R901022127)
▶ Version "K40" IP 67 and IP 69K with mating connector mounted and locked
Control electronics (separate order) Analog amplifier type RA... (data sheet 95230)
BODAS control unit type RC... (data sheet 95200)
Recommended dither frequency (PMW)
Chopper frequency (recommended)
4)
Hz 200
Design according to VDE0580
When establishing the electrical connection, the protective
earthing conductor (PE
) has to be connected correctly.
Technical data
(For applications outside these parameters, please consult us!)
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils HL, HLP FKM DIN 51524
Bio-degradable – insoluble in water HEES FKM VDMA 24568
– soluble in water HEPG FKM
Important information on hydraulic fluids!
▶ For more information and data on the use of other hydraulic
fluids, please refer to data sheet 90220 or contact us.
▶ There may be limitations regarding the technical valve data (tem-
perature, pressure range, life cycle, maintenance intervals, etc.)!
▶ The flash point of the hydraulic fluid used must be 40 K higher
than the maximum solenoid surface temperature.
▶ Bio-degradable: If bio-degradable hydraulic fluids are used that
are also zinc-solving, there may be an accumulation of zinc.
6/10 FTDRE4K | Proportional pressure reducing valve
Bosch Rexroth AG, RE 58038, edition: 2014-04
Characteristic curves with tolerance band
(measured with HLP46,
oil
= 40 ± 5 °C)
Measuring conditions
Amplifier Analog amplifier RA (data sheet 95230)
Chopper frequency Hz 200
Inlet pressure bar 50
Dead volume at the main port
1
ml 135
Control current in A →
Control current in A →
Set pressure at the
main port
1
in bar →
Set pressure at the
main port
1
in bar →
Control pressure 18 bar
Control pressure 30 bar
Proportional pressure reducing valve | FTDRE4K 7/10
RE 58038, edition: 2014-04, Bosch Rexroth AG
Admissible working range
Minimum terminal voltage at the coil and relative duty cycle
Admissible working range against the ambient temperature
Version "G12" (2.4 Ω - 12 V - 1.8 A)
Admissible working range against the ambient temperature
Version "G24" (12 Ω - 24 V - 0.8 A)
Ambient temperature in °C →
(3) Admissible continuous application of
current in A with 100 % duty cycle
→
(2) Relative duty cycle for I
max
(1.8 A) in % →
(1) Required minimum voltage at the coil
inV
→
Ambient temperature in °C →
(3) Admissible continuous application of
current in A with 100 % duty cycle
→
(2) Relative duty cycle for I
max
(0.8 A) in % →
(1) Required minimum voltage at the coil
inV
→
8/10
FTDRE4K | Proportional pressure reducing valve
Bosch Rexroth AG, RE 58038, edition: 2014-04
Dimensions
(dimensions in mm)
1 Mating connector for connector "K40"
(separate order, see data sheet 08006)
2 Mating connector for connector "C4"
(separate order, see data sheet 08006)
3 Wrench size SW27; M
A
= 12
+5
Nm
4 Strainer 160 µm
5 Not contained in "N0" version. Operation by pin tool, to operate
the manual override, the connector must be disconnected ("C4"
and "K40" version). Maximum number of plug-in processes 10
(specification AMP 108-18013).
① = Main port 1 (A)
② = Main port 2 (P)
③ = Main port 3 (T)
Proportional pressure reducing valve | FTDRE4K 9/10
RE 58038, edition: 2014-04, Bosch Rexroth AG
1)
Depth of fit
2)
All seal ring insertion faces are rounded and free of burrs
3)
If recess depth > 1 mm → recess Ø ≥ 33 mm
4)
Required roughness up to Ø27.5 mm
5)
Required levelness up to Ø27.5 mm
6)
Overall contour completed with molding tool
Mounting cavity
(dimensions in mm)
Standards:
Workpiece edges ISO 13715
Form and position tolerance ISO 1101
General tolerances for
metal-cutting procedures
ISO 2768 (mK)
Tolerance ISO 8015
Surface condition ISO 1302
999
Bosch Rexroth AG, RE 58038, edition: 2014-04
10/10
FTDRE4K | Proportional pressure reducing valve
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent.
The data specified above only serve 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.
Available individual components
Seal kits with other seals upon request.
Item Denomination Seal material Material no.
999 Seal kit of the valve FKM R900846072
More information
▶ Control electronics:
– Analog amplifier type RA…
Data sheet 95230
– BODAS control unit type RC…
Data sheet 95200
▶ Hydraulic valves for mobile applications Data sheet 64020-B1
▶ Hydraulic fluids on mineral oil basis Data sheet 90220
▶ Selection of the filters www.boschrexroth.com/filter
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent.
The data specified above only serve 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.
Proportional pressure reducing valve | FTDRE4K 11/10
RE 58038, edition: 2014-04, Bosch Rexroth AG
Notes
Bosch Rexroth AG, RE 58038, edition: 2014-04
12/10
FTDRE4K | Proportional pressure reducing valve
Notes
