RE 29162, edition: 2013-06, Bosch Rexroth AG
Proportional pressure relief valve, directly oper-
ated, without/with integrated electronics (OBE)
Features
▶ Directly operated valves for limiting a system pressure
▶ Operation by means of proportional solenoid
▶ Proportional solenoid with central thread and detach-
able coil
▶ For subplate mounting:
Porting pattern according to ISO 4401
▶ Integrated electronics (OBE) with type DBETE:
Little manufacturing tolerance of the command value
pressure characteristic curve
▶ External control electronics with type DBET:
Amplifier with modular design, Euro-card format and as
plug-in amplifier, individually adjustable upwards and
downwards ramp, fine adjustment of the command
value pressure characteristic curve is possible
Contents
Features 1
Ordering code 2
Symbols 3
Function, section 4
Technical data 5, 6
Electrical connection 7, 8
Integrated electronics (OBE) 8
Characteristic curves 9 ... 11
Dimensions 12 ... 14
Accessories 14
▶ Size 6
▶ Component series 6X
▶ Maximum operating pressure 420 bar
▶ Maximum flow: 2 l/min
RE 29162 
Edition: 2013-06
Replaces: 04.13
Type DBET and DBETE
Inhalt
Features 1
Contents 1
Ordering code 2
Symbols 3
Function, section 4
Technical data
(for applications outside these parameters, please consult
us.) 5
Technical data
(for applications outside these parameters, please consult
us.) 6
Electrical connection (dimensions in mm) 7
Electrical connection 8
Integrated integrated (OBE) with type DBETE 8
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 9
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 10
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 11
Dimensions: Type DBET
(dimensions in mm) 12
Dimensions: Type DBETE
(dimensions in mm) 13
Dimensions 14
Accessories (not included in the scope of delivery) 14
Inhalt
Features 1
Contents 1
Ordering code 2
Symbols 3
Function, section 4
Technical data
(for applications outside these parameters, please consult
us.) 5
Technical data
(for applications outside these parameters, please consult
us.) 6
Electrical connection (dimensions in mm) 7
Electrical connection 8
Integrated integrated (OBE) with type DBETE 8
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 9
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 10
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C) 11
Dimensions: Type DBET
(dimensions in mm) 12
Dimensions: Type DBETE
(dimensions in mm) 13
Dimensions 14
Accessories (not included in the scope of delivery) 14
2/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
Ordering code
01 Proportional pressure relief valve DBET
02 For external control electronics no code
With integrated electronics E
03 Component series 60 to 69 (60 to 69: Unchanged installation and connection dimensions) 6X
Maximum pressure rating
04 Up to 50 bar 50
Up to 100 bar 100
Up to 200 bar 200
Up to 315 bar 315
Up to 350 bar 350
Up to 420 bar 420
05 Pilot oil return internal no code
Pilot oil return, external Y
Supply voltage of the integrated electronics (OBE)
06 24 V DC voltage G24
07 1600 mA coil no code
800mA coil (only possible for DBET-6X (external control electronics)) –8
1)
Electrical connection
08 For type DBET:
Without mating connector; connector DIN EN 175301-803 K4
2)
For type DBETE:
Without mating connector; connector DIN EN 175201-804 K31
2)
Electronics interface
09 Command value 0 to 10 V A1
Command value 4 to 20 mA F1
with DBET no code
Seal material
10 NBR seals M
FKM seals V
Attention: Observe compatibility of seals with hydraulic fluid used! (Other seals upon request)
11 Further details in the plain text
1)
Replacement for series 5X (for comparison, see characteristic
curve on page 9). All hydraulic characteristics specified in the
data sheet refer to the version with a 1600 mA coil.
2)
Mating connectors, separate order, see pages 7 and 14.
01 02 03 04 05 06 07 08 09 10 11
DBET ― 6X / G24 *
Proportional pressure relief valve, directly operated | DBET(E) 3/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
Symbols
For external control electronics (type DBET) With integrated electronics (type DBETE)
Pilot oil return internal Pilot oil return internal
Pilot oil return, external (Y) Pilot oil return, external (Y)
4/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
General information
Type DBET proportional pressure relief valves are remote
control valves with seat design and are used to limit asys-
tem pressure. Operation by means of a proportional sole-
noid with central thread and detachable coil. The interior
of the solenoid is connected to port T or Y and is filled
with the hydraulic fluid. Depending on the electric com-
mand value, these valves can be used to smoothly set the
system pressure to be limited.
The valves mainly consist of the housing (1), the propor-
tional solenoid (2), the valve seat (3) and the valve pop-
pet(4).
Basic principle
For the setting of the system pressure, a command value is
specified at the control electronics. Depending on the
command value, the electronics actuate the solenoid with
electric current. The proportional solenoid converts the
electric current into mechanical force that acts on the
valve poppet (4) via the armature plunger (5). The valve
poppet (4) presses on the valve seat (3) and interrupts the
connection between port P and T or Y. If the hydraulic
force on the valve poppet (4) equals the solenoid force,
the valve controls the set pressure by lifting the valve
poppet (4) off the valve seat (3) and thus enabling hydrau-
lic fluid to flow from port P to T or Y. If the command value
is zero, the control electronics only applies the minimum
control current to the proportional solenoid (2) and the
minimum set pressure is applied.
Function, section
Type DBET
Type DBET...Y
Type DBETE
Pilot oil return, external
Type DBETE – with integrated electronics (OBE)
In terms of function and design, these valves correspond
to type DBET. On the proportional solenoid, there is
ahousing (6) with the control electronics.
Supply and command value voltage are applied at the connec-
tor (7). At the factory, the command value pressure character-
istic curve is adjusted with little manufacturing tolerance.
For more information on the control electronics, see page 8.
Proportional pressure relief valve, directly operated | DBET(E) 5/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
Technical data
(for applications outside these parameters, please consult us.)
hydraulic
Maximum operating pressure – Port P bar 420
Maximum set pressure – Pressure rating 50 bar bar 50
– Pressure rating 100 bar bar 100
– Pressure rating 200 bar bar 200
– Pressure rating 315 bar bar 315
– Pressure rating 350 bar bar 350
– Pressure rating 420 bar bar 420
Minimum set pressure (at command value 0V or 4mA) bar See characteristic curves on page 11
Return flow pressure Port T and/or Y bar Separately at zero pressure to the tank
Maximum flow l/min 2
1)
Hydraulic fluid
1)
See table on page 6
Hydraulic fluid temperature range °C –20 to +80
Viscosity range mm
2
/s 20 to 380, preferably 30 to 46
Maximum permitted degree of contamination of the hydrau-
lic fluid, cleanliness class according to ISO 4406 (c)
Class 20/18/15
2)
Hysteresis % < 4 of the maximum set pressure
Range of inversion % < 0.5 of the maximum set pressure
Response sensitivity % < 0.5 of the maximum set pressure
Linearity (flow 0.8 l/min) % ±3 of the maximum set pressure
Manufacturing tolerance of the
command value pressure char-
acteristic curve, related to
0.8l/min; pressure increasing
at command value 20% % < ±1.5 of the maximum set pressure
3)
at command value 100 % % < ±5 of the maximum set pressure (type DBET)
4)
< ±1.5 of the maximum set pressure (type DBETE)
Step response (Tu + Tg) 0 → 100 % or 100 % → 0
line volume < 20 cm
3
; Q = 0.8 l/min
ms 80 (depending on the system)
general
Weight – Type DBET kg 2.0
– Type DBETE kg 2.15
Mounting orientation Any
Ambient temperature range °C –20 to +70 (DBET)
–20 to +50 (DBETE)
1)
Observe flow limitation for pressure ratings 315, 350 and 420 bar
(page 10).
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
the components.
For the selection of the filters, see www.boschrexroth.com/filter.
3)
Zero point calibration at the factory.
4)
Possible comparison of the external control electronics.
6/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
Technical data
(for applications outside these parameters, please consult us.)
Notice!
Information on the environment simulation testing for the areas
EMC (electromagnetic compatibility), climate and mechanical
load, see data sheet 29162-U (declaration on environmen-
talcompatibility).
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils HL, HLP NBR, FKM DIN 51524
Bio-degradable – Insoluble in water HEES FKM VDMA24568
Flame-resistant – Water-free HFDU FKM ISO 12922
– Containing water HFC (Fuchs Hydrotherm 46M,
Petrofer Ultra Safe 620)
NBR ISO 12922
Important information on hydraulic fluids!
▶ For more information and data on the use of other hydraulic
fluids refer to data sheet 90220 or contact us!
▶ There may be limitations regarding the technical valve data
(temperature, pressure range, life cycle, maintenance inter-
vals,etc.)!
▶ The flash point of the hydraulic fluid used must be 40 K higher
than the maximum solenoid surface temperature.
▶ Flame-resistant – containing water:
– The maximum pressure differential per control edge is 210 bar.
Otherwise, there is increased cavitation erosion.
– Life cycle as compared to operation with mineral oil HLP
30to100%
– Maximum fluid temperature 60 °C
▶ Bio-degradable: When using bio-degradable hydraulic fluids that
are zinc-solving, zinc may accumulate in the fluid (700 mg zinc
per pole tube).
electric G24 G24-8
Minimum solenoid current mA ≤ 100 ≤ 100
Maximum solenoid current mA 1600 ± 10 % 800 ± 5 %
Solenoid coil resis-
tance
– Cold value at 20 °C Ω 5,5 20,6
– Maximum hot value Ω 8,05 33
Switch-on duration % 100 100
electric, integrated electronics (OBE)
Supply voltage – Nominal voltage VDC 24
– Lower limit value VDC 21
– Upper limit value VDC 35
Current consumption A ≤ 1,5
Required fuse protection A 2, slow-blowing
Inputs – Voltage V 0 to 10
– Current mA 4 to 20
Output – Actual current value mV 1 mV ≙ 1 mA
Protection class of the valve according to EN 60529 IP 65 with mating connector mounted and locked
Proportional pressure relief valve, directly operated | DBET(E) 7/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
Electrical connection (dimensions in mm)
Type DBET
Connection at the connector Connection at mating connector
Mating connector (black)
accord-
ing to DIN EN 175301-803,
material no. R901017011
(separate order)
Sealing
material NBR
Type DBETE
Connector pin assignment Contact Allocation interface "A1" Allocation interface "F1"
Supply voltage
A 24 VDC (u(t) = 21 V to 35 V); I
max
≤ 1.5 A
B 0 V
Reference potential actual value C Reference contact F; 0 V Reference contact F; 0 V
Differential amplifier input
D 0 to 10 V; R
E
= 100 kΩ 4 to 20 mA; R
E
= 100 Ω
E Reference potential command value
Measuring output (actual value) F 0 to 1.6 V actual value (1 mV ≙ 1 mA)
Load resistance > 10
kΩ
Protective ground PE Connected to solenoid and valve housing
Plastic version,
material no. R900021267
(separate order)
Metal version,
material no. R900223890
(separate order)
Mating connectors according to DIN EN 175201-804, solder contacts for line cross-section 0.5 to 1.5 mm
2






8/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
Electrical connection
Length in mm →
Min. supply voltage in V→
Function
The electronics are supplied with voltage via ports
AandB. The command value is applied to the differential
amplifier ports D and E.
Via the characteristic curve generator, the command value
solenoid current characteristic curve is adjusted to the
valve so that non-linearities in the hydraulic system are
compensated and thus, a linear command value pressure
characteristic curve is created.
The current controller controls the solenoid current inde-
pendently of the solenoid coil resistance.
The power stage of the electronics for controlling the
proportional solenoid is a chopper amplifier with a cycle
frequency of approx. 180 Hz to 400 Hz. The output signal
is pulse-width modulated (PWM).
In order to check the solenoid current, a voltage can be
measured at the connector between pin F(+) and pin C(–)
that is proportional to the solenoid current. 1 mV corre-
sponds to 1 mA solenoid current.
Connection cable for type DBETE
– Recommendation 6-wire, 0.75 or 1 mm
2
plus
protective grounding conductor and screening
– Only connect the screening to PE on the supply side
– Maximum admissible length = 100 m
The minimum supply voltage at the power supply unit
depends on the length of the supply line (see diagram).
Integrated integrated (OBE) with type DBETE



Chopper
amplifier
Current
controller
Characteristic
curve generator
Differential
amplifier
Solenoid
Oscillator
Command value
Reference potential
actual value
Reference potential
command value
Actual value
GND
24 VDC
Supply
Block diagram
Proportional pressure relief valve, directly operated | DBET(E) 9/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
   






Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C)
1)
Pressure in port P in % →
Pressure in port P depending on the command value (flow = 0.8 l/min)
Pressure in port P in % →
Command value in % →






 
At 20% zero point
calibration at the factory
Type DBET Type DBETE
1)
With valve type DBET, the manufacturing tolerance at the
external amplifier (type and data sheet, see page 14) can
be changed using the command value attenuator potenti-
ometer "Gw". The digital amplifier is set using the param-
eter "Limit".
In this context, the control current according to the techni-
cal data must not be exceeded.
In order that several valves can be adjusted to the same
characteristic curve, do not set the pressure higher than
the maximum set pressure of the pressure rating with
command value 100 %.
Pressure in port P depending on the command value







Pressure in port P in bar →
Command value in % →
Comparison DBET series 5X-6X / pressure rating 200bar
(with amplifier VT-VSPA1-1-1X with 800 mA coil)
Series 5X
Series 6X
Command value in % →




   
Current in A →
Ambient temperature in °C →
Note!
At increased temperature, the solenoid current drops,
which results in a corresponding deviation of the set
pressure.
Current drop as ambient temperature rises, 24 V and
100 % duty cycle
10/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
    






    






    







    






    







    









Pressure in port P in bar →
Flow in l/min →
Pressure in port P depending on the flow
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C)
Pressure in port P in bar →
Flow in l/min →
Pressure rating 50 bar Pressure rating 100 bar
Applicable for all pressure ratings:
Curve 1 at 0 % of the command value
Curve 2 at 25 % of the command value
Curve 3 at 50 % of the command value
Curve 4 at 75 % of the command value
Curve 5 at 100 % of the command value
1; 2)
The characteristic curves were measured
without counter pressure in port T. (p
T
= 0 bar)
Pressure in port P in bar →
Flow in l/min →
Pressure in port P in bar →
Flow in l/min →
Pressure rating 200 bar Pressure rating 315 bar
1)
Pressure in port P in bar →
Flow in l/min →
Pressure in port P in bar →
Flow in l/min →
Pressure rating 350 bar
2)
Pressure rating 420 bar
2)
Maximum operating
pressure
Maximum operating
pressure
Maximum operating
pressure
1)
In the case of characteristic curve 5, the command value may not
exceed the maximum flow of 1.4 l/min
2)
In the case of characteristic curve 5, the command value may not
exceed the maximum flow of 0.8 l/min
Proportional pressure relief valve, directly operated | DBET(E) 11/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
    






Pressure in port P in bar →
Flow in l/min →
Minimum set pressure in port P with command value 0V and/or 4 mA depending on the flow
Characteristic curves
(measured with HLP46, ϑ
Oil
= 40 ±5 °C)
Pressure in port P in bar →
Flow in l/min →
Pressure rating 50 bar
Notice
The characteristic curves were measured without counter
pressure in port T. (p
T
= 0 bar)
Minimum control current ≤ 100 mA
(This current is reached with a command value of 0V and/
or 4mA.)
Pressure in port P in bar →
Flow in l/min →
Pressure in port P in bar →
Flow in l/min →
Pressure rating 200 bar Pressure rating 315 bar
Pressure in port P in bar →
Flow in l/min →
Pressure in port P in bar →
Flow in l/min →
Pressure rating 350 bar Pressure rating 420 bar
Pressure rating 100 bar
12/14 DBET(E) | Proportional pressure relief valve, directly operated
Bosch Rexroth AG, RE 29162, edition: 2013-06
Dimensions: Type DBET
(dimensions in mm)
For valve mounting screws and subplates, see page 14.




























Required surface quality of
the valve contact surface
1 Proportional solenoid
2 Valve housing
3 Name plate
4 Identical seal rings for ports P, T, A and B
5 Mating connector according to DIN EN 175301-803
6 Space required for removing the mating connector
7 Blind counterbores A and B
8 With version ..Y.. (external pilot oil return)
port Y is internally connected to port T.
Port T is not plugged.
9 Machined valve contact surface,
porting pattern according to ISO 4401-03-02-0-05
Deviating from the standard: "A" and "B" channels
not drilled locating pin not included in the scope
of delivery
Proportional pressure relief valve, directly operated | DBET(E) 13/14
RE 29162, edition: 2013-06, Bosch Rexroth AG

































Dimensions: Type DBETE
(dimensions in mm)
For valve mounting screws and subplates, see page 14.


Required surface quality of
the valve contact surface
1 Proportional solenoid
2 Valve housing
3 Integrated electronics (OBE)
4 Identical seal rings for ports P, T, A and B
5 Mating connectors according to
DIN EN 175301-804
6 Space required for removing the mating connector
7 Cable fastening
8 Blind counterbores A and B
9 With version ..Y.. (external pilot oil return)
port Y is internally connected to port T.
Port T is not plugged.
10 Name plate
11 Block diagram of the integrated electronics (OBE)
12 Machined valve contact surface,
porting pattern according to ISO 4401-03-02-0-05
Deviating from the standard: "A" and "B" channels
not drilled locating pin not included in the scope
of delivery
Bosch Rexroth AG, RE 29162, edition: 2013-06
14/14
DBET(E) | Proportional pressure relief valve, directly operated
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.
Dimensions
Accessories (not included in the scope of delivery)
Hexagon socket head cap screws
Material number
Size 6 4x ISO 4762 - M5 x 45 - 10.9-flZn-240h-L
Tightening torque M
A
= 7 Nm ± 10 %
R913000140
Notice: The tightening torque of the hexagon socket head cap screws refers to the maximum operating pressure!
External control for type DBET Data sheet Material number
VT-MSPA1-1-1X/V0/... in modular design (analog)
VT-VSPD-1-2X/V0/.-0-1 in euro-card format (digital)
VT-VSPA1-2-1X/V0/...in euro-card format (analog)
VT-SSPA1-1-1X/V0/0-24 as a plug-in amplifier (analog)
Limitations: No linearization of the command value pressure charac-
teristic curve, higher hysteresis and range of inversion
30223
30523
30115
30265
Mating connectors (details see page 7) Data sheet Material number
For type DBET: Mating connectors according to DIN EN 175301-803
For type DBETE: Mating connectors according to DIN EN 175201-804
08006
08006
R901017011
R900021267 (plastic)
R900223890 (metal)
Subplates Data sheet Material number
G 341/01 (G1/4)
G 341/60 (G3/8)
45052
45052
R900424447
R901027119
External control for type DBET ...G24-8... Data sheet Material number
VT-2000-5X/... in euro-card format
VT-MSPA1-1-30 with modular design
29904
30224
Bosch Rexroth AG
Hydraulics
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97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
documentation@boschrexroth.de
www.boschrexroth.de
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forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
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The data specified above only serve to describe the product. No statements
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It must be remembered that our products are subject to a natural process of
wear and aging.
Proportional pressure relief valve, directly operated | DBET(E) 15/14
RE 29162, edition: 2013-06, Bosch Rexroth AG
Bosch Rexroth AG, RE 29162, edition: 2013-06
16/14
DBET(E) | Proportional pressure relief valve, directly operated