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Proportional pressure relief valve
Type DBETX
Nominal size 6
Unit series 1X
Maximum working pressure P 315 bar, T 250 bar
Nominal flow rate Q
nom
1 l/min
RE 29161/07.05
List of contents
Contents Page
Features 1
Ordering data 2
Preferred types, symbol 2
Function, sectional diagram 3
Technical data 4
External trigger electronics 5 to 7
Characteristic curve 8
Unit dimensions 9
Features
– Directly operated valves (pilot valves) for limiting system
pressure
– Adjustable by means of the solenoid current, see Charac-
teristic curve, Technical data and selected valve electronics
– Solenoid versions I
max
= 0.8 A or I
max
= 2.5 A
– Pressure limitation to a safe level even with faulty electronics
(solenoid current I > I
max
)
– For subplate attachment, mounting hole configuration to
ISO 4401-03-02-0-94
Subplates as per catalog sheet RE 45053 (order separately)
– Plug-in connector to DIN 43650-AM2 included in scope
of delivery
– External trigger electronics with ramps and valve calibration
in the following versions/designs (order separately)
• Plug, setpoint 0...+10 V or 4...20 mA, RE 30264
• Module, setpoint 0...+10 V, RE 30222
• Europe card, setpoint 0...+10 V, RE 30109
P
T
2/10 Bosch Rexroth AG Hydraulics DBETX RE 29161/07.05
Ordering data
Proportional pressure relief valve
Mounting hole configuration to = X
ISO 4401-03-02-0-94
Unit series 10 to 19 = 1X
(10 to 19: installation and connection
dimensions unchanged)
Max. pressure stage
up to 50 bar = 500
up to 80 bar = 800
up to 180 bar = 180
up to 250 bar = 250
up to 315 bar = 315
Voltage supply of trigger electronics = G24
24 V DC
Further information
in plain text
M = NBR seals,
suitable for mineral oils
(HL, HLP) to DIN 51524
Z4 = Electrical connection
Unit plug to DIN 43650-AM2
Plug-in connector included in scope of delivery
N = Manual auxiliary override
Solenoid type (current)
8 = Solenoid current 0.8 A max.
25 = Solenoid current 2.5 A max.
DBET X 1X G24 N Z4 M *
Preferred types
Solenoid 0.8 A Solenoid 2.5 A
Type Material Number Type Material Number
DBETX–1X/50G24–8NZ4M 0 811 402 036 DBETX–1X/50G24–25NZ4M 0 811 402 034
DBETX–1X/80G24–8NZ4M 0 811 402 018 DBETX–1X/80G24–25NZ4M 0 811 402 030
DBETX–1X/180G24–8NZ4M 0 811 402 017 DBETX–1X/180G24–25NZ4M 0 811 402 031
DBETX–1X/250G24–8NZ4M 0 811 402 019 DBETX–1X/250G24–25NZ4M 0 811 402 035
DBETX–1X/315G24–8NZ4M 0 811 402 016 DBETX–1X/315G24–25Z4M 0 811 402 032
Symbol
For external trigger electronics
Hydraulics Bosch Rexroth AGRE 29161/07.05 DBETX
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Function, sectional diagram
General
Type DBETX proportional pressure relief valves are remote-
controlled (pilot) valves in conical seat design. They are used to
limit system pressure.
The valves are actuated by means of a proportional solenoid.
The interior of the solenoid is connected to port T and is filled
with pressure fluid.
With these valves, the system pressure that needs to be limited
can be infinitely adjusted by the valve amplifier electronics
in relation to the solenoid current, at an oil flow 1 l that is as
close as possible to constant.
Basic principle
To adjust the system pressure, a setpoint is set in the trigger
electronics. Based on this setpoint, the electronics control the
solenoid coil with regulated PWM (pulse-width-modulated)
current. The proportional solenoid converts the current to a me-
chanical force, which acts on a main spring by means of the
armature plunger. An “additional” spring between the cone and
the seat contributes to stability and a minimal residual
pressure. The spring force acting on the cone and the pressure
in the valve seat balance one another at a constant oil flow
(0.7...1 l/min). The “p
max
” pressure stage is determined by the
cone and seating bore configuration.
Pressure limitation for maximum safety
If a fault occurs in the electronics, so that the solenoid current
(I
max
) would exceed its specified level in an uncontrolled
manner, the pressure cannot rise above the level determined by
the maximum spring force.
Testing and service equipment
Test box type VT-PE-TB1, see RE 30063
Current measuring adapter type VT-PA-5, see RE 30073
Plug-in connector
Valve body
Solenoid
Accessories
Type Material Number
(4 x) f ISO 4762-M5x30-10.9
Cheese-head bolts
2 910 151 166
Plug VT-SSPA1-525-20/V0 (2.5 A)
RE 30264 0 811 405 143
VT-SSPA1-508-20/V0 (0.8 A)
0 811 405 144
VT-SSPA1-525-20/V0/I (2.5 A)
0 811 405 145
VT-SSPA1-508-20/V0/I (0.8 A)
0 811 405 162
Module VT-MSPA1-525-10/V0 (2.5 A)
RE 30222 0 811 405 127
VT-MSPA1-508-10/V0 (0.8 A)
0 811 405 126
Europe card VT-VSPA1-525-10/V0/RTP (2.5 A)
RE 30109 0 811 405 079
VT-VSPA1-508-10/V0/RTP (0.8 A)
0 811 405 081
Plug-in connector
2P+PE
Plug-in connector 2P+PE (M16x1.5)
included in scope of delivery, see also RE 08008.
4/10 Bosch Rexroth AG Hydraulics DBETX RE 29161/07.05
Technical data
General
Construction Spool valve
Actuation Proportional solenoid without position control, external amplifier
Connection type Subplate, mounting hole configuration NG6 (ISO 4401-03-02-0-94)
Mounting position Optional
Ambient temperature range °C –20...+50
Weight kg 1.9
Vibration resistance, test condition
Max. 25 g, shaken in 3 dimensions (24 h)
Hydraulic (measured with HLP 46,
oil
= 40 °C ±5 °C)
Pressure fluid Hydraulic oil to DIN 51524...535, other fluids after prior consultation
Viscosity range recommended mm
2
/s 20...100
max. permitted mm
2
/s 10...800
Pressure fluid temperature range °C –20...+80
Maximum permitted degree of
contamination of pressure fluid
Purity class to ISO 4406 (c)
Class 18/16/13
1)
Direction of flow
See symbol
Max. set pressure (at Q = 1 l/min) bar
50 80 180 250 315
Minimum pressure (at Q = 1 l/min) bar
23458
Note: At Q
max
= 1.5 l/min the pressure levels stated here increase
Max. mechanical pressure limitation bar
level, e.g. when solenoid current I I
max
< 55 < 85 < 186 < 258 < 325
Max. working press. (at Q = 1 l/min) bar
Port P: 315
2)
Max. pressure bar Port T: 250
Electrical
Cyclic duration factor % 100
Degree of protection IP 65 to DIN 40050 and IEC 14434/5
Solenoid connection Unit plug DIN 43650/ISO 4400, M16x1.5 (2P+PE)
Valve with solenoid type 0.8 A 2.5 A
Max. solenoid current I
max
0.8 A 2.5 A
Coil resistance R
20
22 3
Max. power consumption at 100 % VA
load and operating temperature
25 30
Static/Dynamic
3)
Hysteresis % 4
Range of inversion % 3
Manufacturing tolerance % 10
Response time 100% signal change ms On 60 / Off 70
1)
The purity classes stated for the components must be complied with in hydraulic systems.
Effective filtration prevents problems and also extends the service life of components.
For a selection of filters, see catalog sheets RE 50070, RE 50076 and RE 50081.
2)
The maximum pressure in P is 315 bar in the standard version. 350 bar is available on request.
3)
All characteristic values ascertained using amplifier 0 811 405 079 for the 2.5 A solenoid
and 0 811 405 081 for the 0.8 A solenoid.
Hydraulics Bosch Rexroth AGRE 29161/07.05 DBETX
5/10
Valve with external trigger electronics (plug, RE 30264)
Circuit diagram/pin assignment
1)
Version with 0...+10 V signal
2)
Version with 4...20 mA signal
Connection/calibration
P1 – Ramp time
P2 – Sensitivity
P3 – Zero
P4 – Dither frequency
St1 – Terminal
LED – U
B
display
6/10 Bosch Rexroth AG Hydraulics DBETX RE 29161/07.05
Valve with external trigger electronics (module, RE 30222)
Circuit diagram/pin assignment
Front view/calibration
Hydraulics Bosch Rexroth AGRE 29161/07.05 DBETX
7/10
Valve with external trigger electronics (europe card, RE 30109)
Circuit diagram/pin assignment
8/10 Bosch Rexroth AG Hydraulics DBETX RE 29161/07.05
Characteristic curve (measured with HLP 46,
oil
= 40 °C ±5 °C)
Pressure in port P as a function of the setpoint
Nominal flow rate = 1 l/min
Valve amplifier
1)
Zero adjustment
2)
Sensitivity adjustment
3)
Version: U
E
= 0...+10 V
4)
Version: I
E
= 4...20 mA
U
E
3
)
[V]
I
E
4
)
[mA]
4
4,4 7,5 10,6 13,8 16,9 20
Hydraulics Bosch Rexroth AGRE 29161/07.05 DBETX
9/10
Unit dimensions (nominal dimensions in mm)
Required surface quality
of mating component
Mounting hole configuration: NG6 (ISO 4401-03-02-0-94)
For subplates, see catalog sheet RE 45053
1)
Deviates from standard
2)
Thread depth:
Ferrous metal 1.5 x Ø
Non-ferrous 2 x Ø
PATBF
1
F
2
F
3
F
4
21.5 12.5 21.5 30.2 0 40.5 40.5 0
25.9 15.5 5.1 15.5 0 –0.75 31.75 31
8
1)
8
1)
8
1)
8
1)
M5
2)
M5
2)
M5
2)
M5
2)
X
Y
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Telefon +49 (0) 93 52 / 18-0
Telefax +49 (0) 93 52 / 18-23 58
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 state-
ments 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 judgement and verification. It must be
remembered that our products are subject to a natural process of wear and
aging.
10/10 Bosch Rexroth AG Hydraulics DBETX RE 29161/07.05
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Telefon +49 (0) 93 52 / 18-0
Telefax +49 (0) 93 52 / 18-23 58
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 state-
ments 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 judgement and verification. It must be
remembered that our products are subject to a natural process of wear and
aging.
Hydraulics Bosch Rexroth AGRE 29161/07.05 DBETX
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Telefon +49 (0) 93 52 / 18-0
Telefax +49 (0) 93 52 / 18-23 58
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 state-
ments 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 judgement and verification. It must be
remembered that our products are subject to a natural process of wear and
aging.
DBETX RE 29161/07.05
Bosch Rexroth AG Hydraulics
Notes
