RE 29182/07.
05 1/10
Proportional pressure reducing
valve, pilot operated, with inductive
position transducer
Type DREB6X
Nominal size 6
Unit series 1X
Maximum working pressure P 315 bar, T 250 bar
Maximum flow rate 40 l/min
List of Contents Features
Contents Page – Pilot operated valves for reducing system pressure at the
Features 1 consumer (pilot oil internal only)
Ordering data 2 – 3-way version (P–A /A–T), pmin = pT
Preferred types, symbol 2 – Adjustable through the position of the armature against the
compression spring
Function, sectional diagram 3
– Position-controlled, minimal hysteresis < 1 %, rapid response
Technical data 4
times, see Technical data
External trigger electronics 5 to 8
– Pressure limitation to a safe level even with faulty electronics
Characteristic curves 9 (solenoid current I > Imax)
Unit dimensions 10 – 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 for the solenoid
and plug-in connector for the position transducer,
included in scope of delivery
– Data for the external trigger electronics
• UB = 24 Vnom DC
• Adjustment of valve curve Np and gain
– with and without ramp generator
• Europe card format, setpoint 0...+10 V
(order separately)
2/10 Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Ordering data
DREB6 X 1X M G24 25 Z4 M *
Proportional 3-way pressure Further information in plain text
reducing valve with inductive M= NBR seals,
position transducer, NG6, suitable for mineral oils
pilot operated (HL, HLP) to DIN 51524
Mounting hole configuration to =X Z4 = Electrical connection
ISO 4401-03-02-0-94 Unit plug to DIN 43650-AM2
Unit series 10 to 19 = 1X Plug-in connector included in scope
(10 to 19: installation and connection of delivery
dimensions unchanged) Solenoid type (current)
Max. pressure stage 25 = Solenoid current 2.5 A max.
up to 75 bar = 750
up to 175 bar = 175
up to 310 bar = 310
Without non-return valve =M
Voltage supply of trigger electronics 24 V DC = G24
Preferred types
Solenoid 2.5 A
Type Material Number
DREB6X–1X/75MG24–25Z4M 0 811 402 050
DREB6X–1X/175MG24–25Z4M 0 811 402 051
DREB6X–1X/310MG24–25Z4M 0 811 402 052
Symbol
For external trigger electronics
P T
A
RE 29182/07.05 DREB6X Hydraulics Bosch Rexroth AG 3/10
Function, sectional diagram
General Basic principle
Type DREB6X proportional pressure reducing valves are pilot To adjust the system pressure in A, a setpoint is set in the
operated, with a 3-way main stage. trigger electronics. Based on this setpoint, the electronics
The pilot valve (pressure relief valve pilot stage) is supplied control the solenoid coil with regulated PWM (pulse-width-
internally with a controlled flow of pilot oil via P. modulated) current.
The valves are actuated by a proportional solenoid, which The proportional solenoid is positioned precisely on the spring
is position-controlled against a spring. This ensures rapid characteristic curve. The pilot stage is supplied with oil from P
response times and minimal hysteresis. at a flow rate of < 0.6 l/min via a flow control valve. The pilot
With these valves, the pressure in A (consumer) can be pressure is compared with the consumer pressure (plus spring)
infinitely adjusted and reduced in relation to the solenoid in A and regulated (P–A/A–T).
current. The spring results in pAmin = p in T.
Pressure limitation for maximum safety
If a fault occurs in the electronics, so that the solenoid cur-
rent (Imax) would exceed its specified level in an uncontrolled
manner, the pressure cannot rise above the level determined by
the maximum spring force.
Plug-in connector Flow control valve for
pilot oil flow
Position transducer Solenoid Valve body
Accessories
Type Material Number
(4 x) f ISO 4762-M5 x 30-10.9 Cheese-head bolts 2 910 151 166
Europe card VT-VRPA1-527-10/V0/PV RE 30052 0 811 405 096
Europe card VT-VRPA1-527-10/V0/PV-RTP RE 30054 0 811 405 101
Europe card VT-VRPA1-527-10/V0/PV-RTS RE 30056 0 811 405 176
Plug-in connectors Plug-in connector 2P+PE (M16x1.5) for the solenoid
and plug-in connector for the position transducer,
2P+PE included in scope of delivery, see also RE 08008
Testing and service equipment
Test box type VT-PE-TB1, see RE 30063
Test adapter for Europe cards type VT-PA-3, see RE 30070
4/10 Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Technical data
General
Construction Pilot stage Poppet valve
Main stage Spool valve
Actuation Proportional solenoid with 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 2.4
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 mm2/s 20...100
Viscosity range, max. permitted mm2/s 10...800
Pressure fluid temperature range °C –20...+80
Maximum permitted degree of contamination Class 18/16/13 1)
of pressure fluid
Purity class to ISO 4406 (c)
Direction of flow See symbol
Max. set pressure in A (at Qmin = 1 l/min) bar 75 175 310
Minimum pressure in A bar 0 (relative) or pressure in T
Min. inlet pressure in P bar pP = pA + 5
Max. working pressure bar Port P: 315
Max. pressure bar Port T: 250 (B sealed)
Internal pilot oil flow l/min approx. 0.6 (with closed-loop control)
Max. flow l/min 40
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, M16 x 1.5 (2P+PE)
Position transducer connection Special plug
Max. solenoid current Imax 2.5 A
Coil resistance R20 3
Max. power consumption at 100 % VA 30
load and operating temperature
Static/Dynamic 2)
Hysteresis % 1
Manufacturing tolerance for pmax % 10
Response time 100 % signal change ms On 50 Response time at: Q = 10 l/min
Off 20 (values depend on the dead volume)
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) All characteristic values ascertained using amplifier 0 811 405 096 (without ramp).
RE 29182/07.05 DREB6X Hydraulics Bosch Rexroth AG 5/10
Valve with external trigger electronics (europe card without ramp, RE 30052)
Circuit diagram/pin assignment
6/10 Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Valve with external trigger electronics (europe card without ramp, RE 30054)
Circuit diagram/pin assignment
RE 29182/07.05 DREB6X Hydraulics Bosch Rexroth AG 7/10
Valve with external trigger electronics (europe card without ramp, RE 30056)
Circuit diagram/pin assignment
Daughter card,
see page 8
8/10 Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Valve with external trigger electronics (europe card without ramp, RE 30056)
Circuit diagram/pin assignment Daughter card
RE 29182/07.05 DREB6X Hydraulics Bosch Rexroth AG 9/10
Characteristic curves (measured with HLP 46, oil = 40 °C ±5 °C)
Pressure in port A as a function of the setpoint
Valve amplifier
1) Zero adjustment
2) Sensitivity adjustment
Pressure in port A proportionate to the maximum
flow rate of the main stage
Set pressure
p % pmax = f (QP–A/QA–T)
P T
A
10/10 Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Unit dimensions (nominal dimensions in mm)
B: sealed
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
P A T B F1 F2 F3 F4
X 21.5 12.5 21.5 30.2 0 40.5 40.5 0
Y 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)
Bosch Rexroth AG © This document, as well as the data, specifications and other information
Hydraulics set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
Zum Eisengießer 1 reproduced or given to third parties without its consent.
97816 Lohr am Main, Germany The data specified above only serve to describe the product. No state-
Telefon +49 (0) 93 52 / 18-0 ments concerning a certain condition or suitability for a certain application
Telefax +49 (0) 93 52 / 18-23 58 can be derived from our information. The information given does not release
documentation@boschrexroth.de the user from the obligation of own judgement and verification. It must be
www.boschrexroth.de remembered that our products are subject to a natural process of wear and
aging.
RE 29182/07.05 DREB6X Hydraulics Bosch Rexroth AG
Notes
Bosch Rexroth AG © This document, as well as the data, specifications and other information
Hydraulics set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
Zum Eisengießer 1 reproduced or given to third parties without its consent.
97816 Lohr am Main, Germany The data specified above only serve to describe the product. No state-
Telefon +49 (0) 93 52 / 18-0 ments concerning a certain condition or suitability for a certain application
Telefax +49 (0) 93 52 / 18-23 58 can be derived from our information. The information given does not release
documentation@boschrexroth.de the user from the obligation of own judgement and verification. It must be
www.boschrexroth.de remembered that our products are subject to a natural process of wear and
aging.
Bosch Rexroth AG Hydraulics DREB6X RE 29182/07.05
Notes
Bosch Rexroth AG © This document, as well as the data, specifications and other information
Hydraulics set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
Zum Eisengießer 1 reproduced or given to third parties without its consent.
97816 Lohr am Main, Germany The data specified above only serve to describe the product. No state-
Telefon +49 (0) 93 52 / 18-0 ments concerning a certain condition or suitability for a certain application
Telefax +49 (0) 93 52 / 18-23 58 can be derived from our information. The information given does not release
documentation@boschrexroth.de the user from the obligation of own judgement and verification. It must be
www.boschrexroth.de remembered that our products are subject to a natural process of wear and
aging.
