1/20
3-way servo solenoid valves,
cartridge type, pilot operated,
with inductive position transducer
Type 3WRCB 25...50
Nominal size (NG) 25, 32, 50
Unit series 1X
Maximum working pressure P, A, T, X, Z 315 bar
Nominal flow rate Q
nom
65...750 l/min
RE 29217/12.05
Overview of Contents
Contents Page
Features 1
Ordering data 2
Preferred types 2
Symbols and control oil supply 3
Function, sectional diagram 4
Overview 5 and 6
Technical data 7 and 8
Connection 8
On-board trigger electronics 9 to 11
External trigger electronics 12
Characteristic curves 13 and 14
Unit dimensions 15 to 17
Installation dimensions 18 to 20
Different versions on request
– For standard applications
– Special symbols for plastics machines
– Valve electronics (OBE) with 11P+PE interface possible
Features
– Pilot operated servo solenoid valves NG25 to NG50
– Design: cartridge type, 3/2-way symbol
Metering edges P–A / A–T
– Control spool with anti-rotation element and metering edges
in servo quality
– Pressure-tight up to 315 bar
– Pilot line A–X generally required
– Dynamic return (B–Z) possible with the NG25 and NG50
– With inductive position transducer, position-controlled by the
external pilot valve and the valve electronics
– Pilot valve mounted externally on valve block
– Hysteresis < 0.1 %, scarcely measurable
– Flow characteristic
• M = progressive with fine metering edge
– Plug-in connector for inductive position transducer (4P)
included in scope of delivery
– Employed in electrohydraulic closed-loop controllers
in production and testing systems
– Choice of pilot control:
• 4WRPEH6... with on-board electronics, see RE 29035
• 4WRPH6... with external electronics, see RE 29028 and
RE 30045
2/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Ordering data
3/2-way cartridge
servo solenoid valve
Hydraulically actuated
NG25 = 25
NG32 = 32
NG50 = 50
Piston with zero overlap = V
Ratio of positioning surface area on piston
1:1 = no code
1:1.5 = F
Nominal flow rate l/min (with 5 bar pressure drop at valve)
NG25
65 l/min = 65
0
190 l/min = 190
NG32
380 l/min = 380
NG50
300 l/min = 300
750 l/min = 750
M = NBR seals,
suitable for mineral oils
(HL, HLP) to DIN 51524
Z = Additional control oil port*
1X = Unit series 10 to 19
(10 to 19: installation and connection
dimensions unchanged)
M = Non-linear characteristic
Progressive with linear fine metering range
* Not possible for NG32
Preferred types
Type Material Number
NG25
3WRCBH25VF65M–1X/ZM 0 811 402 513
3WRCBH25VF190M–1X/ZM 0 811 402 514
NG32
3WRCBH32V380M–1X/M 0 811 402 611
NG50
3WRCBH50VF750M–1X/ZM 0 811 402 639
3WRCBH50VF300M–1X/ZM 0 811 402 640
Note
You can find an overview of and further information
on the pilot valves and accessories on pages 5 and 6.
3WRCB H V M 1X Z M
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
3/20
Symbols and control oil supply
Pilot valve
NG32, with A–X NG25, 50 with A–X and B–Z
Main stage
Pilot valve
Main stage
A 씯씮 XA 씯씮 X / B 씯씮 Z
4/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Function, sectional diagram
General
3/2-way cartridge servo solenoid valves are pilot operated main
stages with two metering edges, P–A / A–T.
At the transition, fine metering edges ensure minimum oil leak-
age with high, linear pressure gain. The spool position is
deflected by the control oil of the pilot valve. If X is relieved
of pressure, the load pressure in A and the internal spring
cause the spool to return (symbol A–T). The position of the
spool is detected by an inductive position transducer, and its
signal together with the valve electronics allows closed-loop
position control by an NG6 pilot servo solenoid valve.
Hysteresis is < 0.1 % and thus scarcely measurable. The
design of these valves is extremely compact, and is frequently
employed in the plastics branch in injection molding cylinders.
Pressure relief takes place by way of the metering edge A–T.
The NG25 and NG50 valves also offer a port Z, which enables
a faster return when there is little load in A. For this purpose,
the pilot valve must be connected to A–X and B–Z.
Basic principle
Pilot operated 3/2-way cartridge servo solenoid valves have
metering edges in servo quality, see characteristic curves. The
spool position is measured by an inductive position transducer
and processed by the external position control.
The following components are required for the external position
control:
– Pilot valve 4WRP(E)H 6
– Valve electronics, internal (OBE) or external
– Valve block (provided by customer).
The switching of control oil in the valve block and the electrical
connection together form the basis of the pilot operated
valve function for closed-loop control tasks in the system.
This is mostly a process for speed and pressure control. The
system’s process controllers form the valve signal for the
control loop.
Pilot valve
with on-board electronics (OBE)
or with external electronics
Main stage
3/2-way cartridge servo solenoid valve
3WRCB 25...50
Valve amplifier
4WRPEH6...
4WRPH6...
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
5/20
Testing and service equipment
Test box type VT-PE-TB3, see RE 30065
Measuring adapter 6P+PE type VT-PA-2, see RE 30068
Main stage Pilot valve
3WRCB25...50 NG Material Number 4WRPEH6...
Q
N
l/min
Material Number
Signal ± 10 V
Material Number
Signal 4...20 mA
25
0 811 402 513 12 0 811 404 601 0 811 404 632
0 811 402 514
32
0 811 402 611 24 0 811 404 602 0 811 404 633
50
0 811 402 639 40 0 811 404 603 0 811 404 634
0 811 402 640
Overview
3WRCB25...50 with on-board electronics (OBE)
Accessories
Type Material Number
PG7
Plug-in connector 4P for 3WRCB25...50
Included in scope
of delivery
(4x) f ISO 4762
Cheese-head bolts for 3WRCB25...50
Cable for connecting
main stage to pilot valve,
see below
1 834 463 005
(4x) f ISO 4762
Cheese-head bolts M5x30 for 4WRPEH6...
2 910 151 166
Plug-in connector 6P+PE for 4WRPEH6...,
see also RE 08008
KS – PG11 1 834 482 022
KS – PG11 1 834 482 026
MS – PG11 1 834 482 023
MS – PG16 1 834 482 024
KS – PG11 – 90° 1 834 484 252
Cable for main stage and pilot valve (4WRPEH6...)
This cable is used to connect
the main stage to the pilot valve.
Cable for connecting
main stage to pilot valve
Material Number
1 834 463 005
6/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Testing and service equipment
Test box type VT-PE-TB2, see RE 30064
Test adapter type VT-PA-3, see RE 30070
Main stage Pilot valve
3WRCB25...50 NG Material Number 4WRPH6...
Q
N
l/min
Material Number
Signal ± 10 V
25
0 811 402 513 12 0 811 404 034
0 811 402 514
32
0 811 402 611 24 0 811 404 035
50
0 811 402 639 40 0 811 404 036
0 811 402 640
Overview
3WRCB25...50 with external electronics
Accessories
Type Material Number
PG7
Plug-in connector 4P for 3WRCB25...50
Included in scope
of delivery
(4x) f ISO 4762
Cheese-head bolts for 3WRCB25...50
M16x1,5 PG7
Plug-in connector 4P and 2P+PE for 4WRPH6...
(4x) f ISO 4762
Cheese-head bolts M5x30 for 4WRPH6...
2 910 151 166
Europe card
VT-VRRA1-527-20/V0/2STV, see RE 30045
0 811 405 063
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
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Technical data
General
Construction 3/2-way cartridge servo solenoid valve, pilot operated main stage
Actuation Servo solenoid valve NG6, on the block as a separate pilot valve
Type of mounting Cartridge type, see installation dimensions
Installation position Horizontal, or position transducer facing downwards
Ambient temperature range °C –20...+50
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
Viscosity range 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 symbols
NG25 NG32 NG50
Nominal flow rate l/min
at ∆p = 5 bar per edge
2)
65 190 380 300
750
Max. working pressure bar Port P, A, T, X, Z: 315
Q
max
l/min
200 570 1000 900 2250
Q
N
pilot valve l/min
12 24 40
Leakage cm
3
/min
Pilot valve at 100 bar
< 300 < 500 < 900
Leakage cm
3
/min
Main stage at100 bar
< 350 < 350 < 500 < 500 < 600
Control oil flow p = 100 bar l/min
and at max. dynamics
81628
Control oil pressure “pilot stage” bar
min. = p
A
+ 4
All above characteristics valid only in connection with valve 4WRPEH6..., see page 5.
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)
Flow at a different ∆p
∆p
x
Q
x
= Q
nom
·
冪莦
5
Important
Information on Q
nom
/Q
max
only applies if installation dimensions are complied with.
8/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Connection
For electrical data, see page 7 and
Operating Instructions 1 819 929 083
Technical notes for the cable
Design: – Multi-wire cable
– Extra-finely stranded wire to
VDE 0295, Class 6
– Safety earth conductor, green/yellow
– Cu braided shield
Type: – e.g. Ölflex-FD 855 CP
(from Lappkabel company)
No. of wires: – Determined by type of valve,
plug type and signal assignment
Cable Ø: – 0.75 mm
2
up to 20 m long
– 1.0 mm
2
up to 40 m long
Outside Ø: – 9.4...11.8 mm – Pg11
– 12.7...13.5 mm – Pg16
Important
Power supply 24 V DC nom.,
if voltage drops below 18 V DC, rapid shutdown resembling
“Enable OFF” takes place internally.
In addition, with the “mA signal” version:
I
D–E
⭌ 3 mA – valve is active
I
D–E
⬉ 2 mA – valve is deactivated.
Electrical signals (e.g. actual values) emitted via the trigger
electronics must not be used to shut down safety-relevant
machine functions!
(Also see European Standard, “Technical Safety Requirements
for Fluid-Powered Systems and Components – Hydraulics”,
EN 982.)
Technical data
Static/Dynamic
Hysteresis % ⬍ 0.1, scarcely measurable
Manufacturing tolerance % ⱕ 10
NG25 NG32 NG50
Response time for signal ms
change 0...100 %
(p
X
= 100 bar/p
A
= 50 bar) A–X
33 28 60
Response time for signal ms
change 0...100 %
(p
X
= 100 bar/p
A
= 50 bar) A–X/B–Z
27 – 50
Switch-off behavior After electrical switch-off: pilot valve in “fail-safe”,
main stage moves to “A–T” symbol position
Thermal drift
Zero drift < 1 % at ∆T = 40 °C
Zero calibration Adjustable by ±5 % on valve amplifier, pilot valve with OBE factory-set
Electrical
Position transducer
DC/DC technology
Supply: +15 V/35 mA
Supply: –15 V/25 mA
Signal: 0...±10 V (R
L
⭌ 10 k Ω)
All above characteristics valid only in connection with valve 4WRPEH6..., see page 5.
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
9/20
On-board trigger electronics
Circuit diagram/pin assignment
Version A1: U
D–E
0...±10 V
Supply U
B
Supply zero
Ref. zero *
Setpoint 0...±10 V
Actual value 0...±10 V **
Safety earth conductor 쓔
Shield
** Do not connect to supply
zero!
** Actual value of main stage
Pilot line A – X
10/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
On-board trigger electronics
Circuit diagram/pin assignment
Version F1: I
D–E
4...20 mA
Supply U
B
Supply zero
씯 Loop I
F–C
I
D–E
4...20 mA
Test I
F–C
(4...20 mA) *
Safety earth conductor 쓔
Shield
씯
씮
Pilot line A – X
* Actual value of main stage
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
11/20
On-board trigger electronics
Pin assignment 6P+PE
Version A1: U
D–E
0...±10 V
(R
i
= 100 kΩ)
Pin assignment 6P+PE
Version F1: I
D–E
4...20 mA
(R
sh
= 200 Ω)
12/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Valve with external trigger electronics (Europe card, RE 30045)
Circuit diagram/pin assignment
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
13/20
Characteristic curves (measured with HLP 46,
oil
= 40 °C ±5 °C)
Flow rate/signal function
Pressure gain
100
80
60
40
20
–
100
–
40
–
60
–
80
–
20
–
10
–U
E
[V]
+U
E
[V]
–
8
–
6
–
4
–
2
246810
Q [%] P–A
Q [%] A–T
14/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Characteristic curves (measured with HLP 46,
oil
= 40 °C ±5 °C)
Bode diagram
NG25
NG50
NG32
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
15/20
Unit dimensions NG25 (nominal dimensions in mm)
See installation dimensions on page 18
f
M12x35, ISO 4762 included
e
90
+30
Nm
Set of seals
w
Set 1 817 010 326
1 837 001 301
Set of seals
16/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Unit dimensions NG32 (nominal dimensions in mm)
See installation dimensions on page 19
f
M16x50, ISO 4762 included
e
240
+50
Nm
Set of seals
w
Set 1 817 010 277
1 837 001 302
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
17/20
Unit dimensions NG50 (nominal dimensions in mm)
See installation dimensions on page 20
f
M20x70, ISO 4762 included
e
450
+110
Nm
Set of seals
w
Set 1 817 010 322
1 837 001 303
18/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Installation dimensions NG25 (nominal dimensions in mm)
A 씯씮 X / B 씯씮 Z
Hydraulics Bosch Rexroth AGRE 29217/12.05 3WRCB 25...50
19/20
Installation dimensions NG32 (nominal dimensions in mm)
A 씯씮 X
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.
20/20 Bosch Rexroth AG Hydraulics 3WRCB 25...50 RE 29217/12.05
Installation dimensions NG50 (nominal dimensions in mm)
A 씯씮 X / B 씯씮 Z
