1/28
Information on available spare parts:
www.boschrexroth.com/spc
4/2, 4/3, and 5/2, 5/3 proportional direc-
tional valve, pilot operated,
without electrical position feedback
without/with integrated electronics (OBE)
Type .WRZ…, .WRZE… and .WRH…
Sizes 10 to 52
Component series 7X
Maximum operating pressure 350 bar
Maximum flow 2800 l/min
RE 29115/08.13
Replaces: 10.05
Table of contents
Contents Page
Features 1
Ordering codes, control spool symbols 2 ... 5
Symbols 6
Function, section 7 ... 10
Technical data 11, 12
Electrical connection 13
Block diagram of the integrated electronics (OBE) for
type 4WRZE 14
Characteristic curves 15 ... 20
Dimensions 21 ... 26
Accessories 27
Features
– Pilot operated, 2-stage proportional directional valve with
integrated electronics (OBE) with type 4WRZE
– Control of flow direction and size
– Operation by means of proportional solenoids with central
thread and detachable coil
– For subplate mounting:
Porting pattern according to ISO 4401
– Manual override, optional
– Spring-centered control spool
– Control electronics
•Type.WRZE…
- Integrated electronics (OBE) with voltage or current input
(A1 and/or F1)
•Type.WRZ…
- Digital or analog amplifier in Euro-card format
- Analog amplifier in modular design
Type4WRZ10…-7X/…K4/...
with the corresponding control
electronics (separate order)
Type4WRZE10…-7X/...K31/...
with integrated electronics (OBE)
Inhalt
Table of contents 1
Features 1
Ordering codes
(types 4WRZ and 4WRH; sizes 10 to 32 subplate
mounting; size 52 flange connection) 2
3
Control spool symbols 3
Ordering codes (types 4WRZ 52 and 4WRH 52; subplate
mounting) 4
Control spool symbols 5
Symbols (simplified) 6
Function, section 7
Function, section 8
Function, section 9
Function, section 10
Technical data (for applications outside these parameters,
please consult us!) 10
Technical data (for applications outside these parameters,
please consult us!) 11
Technical data (for applications outside these parameters,
please consult us!) 12
Electrical connection 13
Block diagram of the integrated electronics (OBE) for type
WRZE 14
Characteristic curves size 10 (control spool "E, W6-, EA, W6A"
as well as HLP46, = 40 °C ±5 °C and p = 100 bar)
15
Characteristic curves size 16 (control spool "E, W6-, EA, W6A"
as well as HLP46,
il
= 40 °C ±5 °C and p = 100 bar) 16
Characteristic curves size 16 (control spool "E, W6-, EA, W6A"
as well as HLP46,
oil
= 40 °C ±5 °C and p = 100 bar) 17
Characteristic curves size 25 (control spool "E, W6-, EA, W6A"
as well as HLP46,
oil
= 40 °C ±5 °C and p = 100 bar) 18
Characteristic curves size 32 (control spool "E, W6-, EA, W6A"
as well as HLP46,
oil
= 40 °C ±5 °C and p = 100 bar) 19
Characteristic curves size 52 (control spool "E, W6-, EA, W6A"
as well as HLP46,
oil
= 40 °C ±5 °C and p = 100 bar) 20
Dimensions: Size 10 (dimensions in mm)
21
Dimensions: Size 16 (dimensions in mm)
22
Dimensions: Size 25 (dimensions in mm) 23
Dimensions: Size 32 (dimensions in mm) 24
Dimensions: Subplate mounting size 52 (dimensions in mm) 25
Dimensions: Flange connection size 52 (dimensions in mm)
26
Accessories (not included in the scope of delivery) 27
Notes 28
2/28 Bosch Rexroth AG Hydraulics
.WRZ; .WRZE; .WRH RE 29115/08.13
Ordering codes
(types 4WRZ and 4WRH; sizes 10 to 32 subplate mounting; size 52 flange connection)
4WR_ 7X
Hydraulic actuation = H
Electro-hydraulic actuation = Z
Type WRZ:
For external electronics = no code
With integrated electronics = E
Size 10 = 10
Size 16 = 16
Size 25 = 25
Size 32 = 32
Size 52 = 52
For control spool symbols, see page 3
Rated flow in l/min at valve pressure differential Δp = 10 bar
Size 10
25 l/min = 25
50 l/min = 50
85 l/min = 85
Size 16
100 l/min = 100
125 l/min = 125
150 l/min = 150
180 l/min = 180
Size 25
220 l/min = 220
325 l/min = 325
Size 32
360 l/min = 360
520 l/min = 520
Size 52
1000 l/min = 1000
Component series 70 to 79 = 7X
(70 to 79: Unchanged installation and connection dimensions)
For subplate mounting = no code
For flange connection (size 52 only) = F
Pilot control valve size 6
Proportional solenoid with detachable coil = 6E
1)
Supply voltage
Direct voltage 24 V = G24
1)
Without manual override = no code
With concealed manual override = N9
1, 2)
Without special type of protection = no code
Seawater-resistant = J
3)
Pilot oil supply and return
External pilot oil supply, external pilot oil return = no code
Internal pilot oil supply, external pilot oil return = E
Internal pilot oil supply, internal pilot oil return = ET
External pilot oil supply, internal pilot oil return = T
(only possible without code for size 52 and type 4WRH)
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
3/28
Electric special types of protection available on request.
For further details, see the plain text
M = NBR seals
V = FKMseals
no code = Without pressure reducing valve
D3
1)
= With pressure reducing valve ZDR 6 DP0-4X/40YM-W80 (not adjustable)
Electronics interface
A1 = Command value ±10 V
F1 = Command value 4 to 20 mA
no code = For types WRZ and WRH
Electrical connection type WRZ:
K4
1, 4)
= Without mating connector, with connector according to DIN EN 175301-803
Mating connector, separate order, see page 27
Type WRZE:
K31
1, 4)
= Without mating connector, with connector according to DIN EN 175201-804
Mating connector, separate order, see page 27
*
1)
Not applicable with types 4WRH
2)
Forversion"J"→"N"insteadof"N9"













1)
Not for type 4WRH
Control spool symbols
With symbols E1- and W8-: P→A:q
V
B→T:q
V
/2
P→B:q
V
/2 A→T:q
V
With symbols E3- and W9-: P→A:q
V
B→T:Blocked
P→B:q
V
/2 A→T:q
V
(differential circuit, piston top at port A)
Notice: With symbols W6-, W8-, W9-, W6A, there is a
connectionfromA→TandB→Twithlessthan2%ofthe
respective nominal cross-section in switching position "0".
3)
For information on the seawater-resistant version,
see data sheet 29115-M
4)
For version "J" = seawater-resistant only "K31"
4/28 Bosch Rexroth AG Hydraulics
.WRZ; .WRZE; .WRH RE 29115/08.13
Ordering codes (types 4WRZ 52 and 4WRH 52; subplate mounting)
Electric special types of protection available on request.
5WR_ 52 1000 7X *
Hydraulic actuation = H
Electro-hydraulic = Z
actuation
Type WRZ:
For external electronics = no code
With integrated electronics = E
Size 52 = 52
For control spool symbols, see page 5
Rated flow in l/min at valve
pressure differential Δp = 10 bar
1000 l/min = 1000
Component series 70 to 79 = 7X
(70 to 79: Unchanged installation and connection dimensions)
Pilot control valve size 6
Proportional solenoid with detachable coil = 6E
1)
Supply voltage
Direct voltage 24 V = G24
1)
Without manual override = no code
With concealed manual override = N9
1, 2)
Without special type of protection = no code
Seawater-resistant = J
3)
Electrical connection type WRZ:
Without mating connector, with connector according to DIN EN 175301-803 = K4
1, 4
Mating connector, separate order, see page 27
Type WRZE:
Without mating connector, with connector according to DIN EN 175201-804 = K31
1, 4
Mating connector, separate order, see page 27
Electronics interface
Command value ±10 V = A1
Command value 4 to 20 mA = F1
For types WRZ and WRH = no code
Without pressure reducing valve = no code
With pressure reducing valve ZDR 6 DP0-4X/40YM-W80 (not adjustable) = D3
1)
NBR seals = M
FKMseals = V
For further details, see the plain text
1)
Not applicable with types 4WRH
2)
Forversion"J"→"N"insteadof"N9"
3)
For information on the seawater-resistant version,
see data sheet 29115-M
4)
For version "J" = seawater-resistant only "K31"
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
5/28
Ordering codes (types 4WRZ 52 and 4WRH 52; subplate mounting)











1)
Not for type 4WRH
Control spool symbols
With symbols E1- and W8-: P→A:q
V
B→T:q
V
/2
P→B:q
V
/2 A→R:q
V
With symbols E3- and W9-: P→A:q
V
B→T:Blocked
P→B:q
V
/2 A→R:q
V
(differential circuit, piston top at port A)
Notice:
– Only external pilot oil supply and return possible
– With control spool W6-, W8-, W9-, W6A, there is a con-
nectionfromA→RandB→Twithlessthan2%ofthe
respective nominal cross-section in switching position "0".
6/28 Bosch Rexroth AG Hydraulics


















.WRZ; .WRZE; .WRH RE 29115/08.13
Symbols (simplified)
Type4WRZE…-7X./…and
type4WRZE52…-7XF/…
Type4WRZE…A-7X./…and
type4WRZE52A…-7XF/…
Type5WRZE52-7X./…
Type4WRZE…-7X./…ET…
Type5WRZE52A-7X./…
Type4WRZE.A…-7X./…ET…
Type5WRZ52-7X./…
Type4WRZ…-7X./…ET…
X = external
Y = external
X = external
Y = external
X = internal
Y = internal
Type4WRZ…-7X./…and
type4WRZ52…-7XF/…
Type4WRZ…A-7X./…and
type4WRZ52A…-7XF/…
Type5WRZ52A-7X./…
Type4WRZ.A…-7X./…ET…
Type4WRH…A…-7X./…and
type4WRH52…-7XF/…
Type5WRH52A…-7X./…Type5WRH52…-7X.
X = external
Y = external
X = external
Y = external
Type4WRH…-7X./…and
type4WRH52…-7XF/…
X = external
Y = external
X = external
Y = external
X = internal
Y = internal
With electro-hydraulic actuation and for external electronics
With electro-hydraulic actuation and for integrated electronics
With hydraulic actuation
Hydraulics Bosch Rexroth AG





RE 29115/08.13 .WRZ; .WRZE; .WRH
7/28
Function, section
Throttle insert
see page 26
Pilot control valve with two switching positions
(type3DREP6…B…)
The operation of this valve version basically corre-
sponds to the valve with 3 switching positions. However,
this 2 spool position valve is only equipped with sole-
noid "a" (5). In the place of the second proportional sole-
noid there is a plug screw (9).
Information on type 3DREP 6:
Prevent the tank line from draining. If this is possible
due to installation conditions, install a preload valve
(with a preload pressure of approx. 2 bar).
Type 3DREP 6…
Pilot control valve type 3DREP 6…
The pilot control valve is a 3-way pressure reducing valve that
is actuated by a proportional solenoid. It converts an electrical
input signal into a proportional pressure output signal and is
used for all valves of the type 4WRZ... and 5WRZ...
The proportional solenoids are controllable, wet-pin DC sole-
noids with a central thread and a detachable coil. The sole-
noids are controlled by external electronics (type .WRZ...).
Set-up:
The valve basically consists of:
– Housing (1)
– Control spool (2) with pressure measuring spool (3 and 4)
– Solenoids (5 and 6) with central threads
Function:
The pressure in A or B is set by means of the proportional
solenoids. The amount of the pressure depends on the cur-
rent. With de-energized solenoids (5, 6), the control spool (2)
is held in the central position by means of the pressure
springs (8). Ports A and B are connected with T so that the
hydraulic fluid can flow to the tank without obstructions.
By energizing a proportional solenoid, e.g. solenoid "a" (5),
the pressure measuring spool (3) and with it the control
spool (2) are moved to the right. This opens the connec-
tion from P to B and A to T via orifice-type cross-sections
with progressive flow characteristic. With the surface of the
pressure measuring spool (4) the pressure that builds up in
channel B acts on the control spool and against the solenoid
force. The pressure measuring spool (4) is supported by sole-
noid "b". If the pressure exceeds the value set at solenoid "a",
the control spool (2) is pushed back against the solenoid
force and connects B with T until the set pressure is reached
again. The pressure is proportional to the solenoid current.
When the solenoid is switched off, the control spool (2)
is returned into the central position by the compression
springs (8).
8/28 Bosch Rexroth AG Hydraulics
.WRZ; .WRZE; .WRH RE 29115/08.13
Function, section
Type 3DREPE 6…



Pilot control valve type 3DREPE 6…
The pilot control valve is a 3-way pressure reducing valve that
is actuated by a proportional solenoid. It converts an electrical
input signal into a proportional pressure output signal and is
used for all valves of the type 4WRZE... and 5WRZE...
The proportional solenoids are controllable, wet-pin DC sole-
noids with a central thread and a detachable coil. The solenoids
are controlled by the integrated electronics (type .WRZE...)
.
Set-up:
The valve basically consists of:
– Housing (1)
– Control spool (2) with pressure measuring spool (3 and 4)
– Solenoids (5 and 6) with central threads
– Integrated electronics (7)
Function:
The pressure in A or B is set by means of the proportional
solenoids. The amount of the pressure depends on the cur-
rent. With de-energized solenoids (5, 6), the control spool (2)
is held in the central position by means of the pressure
springs (8). Ports A and B are connected with T so that the
hydraulic fluid can flow to the tank without obstructions.
By energizing a proportional solenoid, e.g. solenoid "a" (5),
the pressure measuring spool (3) and with it the control
spool (2) are moved to the right. This opens the connec-
tion from P to B and A to T via orifice-type cross-sections
with progressive flow characteristic. With the surface of the
pressure measuring spool (4) the pressure that builds up in
channel B acts on the control spool and against the solenoid
force. The pressure measuring spool (4) is supported by sole-
noid "b". If the pressure exceeds the value set at solenoid "a",
the control spool (2) is pushed back against the solenoid
force and connects B with T until the set pressure is reached
again. The pressure is proportional to the solenoid current.
When the solenoid is switched off, the control spool (2)
is returned into the central position by the compression
springs (8).
Throttle insert
see page 26
Hydraulics Bosch Rexroth AG










RE 29115/08.13 .WRZ; .WRZE; .WRH
9/28
Function, section
Pilot operated proportional directional valves
Types 4WRZ… and 5WRZ.52…
Valves of type 4WRZ... are pilot operated 4-way directional
valves that are actuated by proportional solenoids. They con-
trol the flow direction and size.
Valves of type 5WRZ... are equipped with an additional
port "R" (only size 52).
Set-up:
The valve basically consists of:
– Pilot control valve (9) with proportional solenoids (5 and 6)
– Main valve (10) with main control spool (11) and centering
spring (12)
Function:
– With de-energized solenoids (5, 6), the main control
spool (11) is held in the central position by means of the
centering spring (12).
– The main control spool (11) is controlled by the pilot control
valve (9); the main control spool is proportionally moved,
e.g. by actuating solenoid "b" (6).
→ Thecontrolspool(2)ismovedtotheright,pilotoil
enters the pressure chamber (13) via the pilot control
valve (9) and deflects the main control spool (11) ac-
cording to the electric input signal.
→ ThisopenstheconnectionfromPtoBandAto
T via orifice-type cross-sections with progressive
flow characteristic.
– Pilot oil is internally supplied to the pilot control valve via
port P or externally via port X.
– Switching the solenoid off (6)
→ Thecontrolspool(2)andmaincontrolspool(11)are
moved back into the central position.
– Depending on the switching position, flow occurs
from P to A and B to T or P to B and A to T (R).
An optional manual override (14 and 15) can be used to move
the control spool (2) without solenoid energization.
Notice:
Inadvertent activation of the manual override may result in
uncontrollable machine movements.
Type 4WRZE…-7X/...
Notice!
Due to the design principle, internal leakage is inherent to the
valves, which may increase over the life cycle.
10/28 Bosch Rexroth AG Hydraulics
.WRZ; .WRZE; .WRH RE 29115/08.13






Externally pilot operated proportional directional valves
Types 4WRH… and 5WRH.52…
Valves of the type .WRH... are pilot operated proportional direc-
tional valves for external actuation via pressure control valves.
Set-up:
The valve basically consists of:
– Main valve (10) with main control spool (11) and centering
spring (12)
– Diversion plate (16)
Function, section
Function:
–
The diversion plate (16) connects control port A that leads
to the pressure chamber (13) with port Y and control port B
with port X.
– If port X is pressurized, the main control spool (11) is
moved to the right (P to B and A to T). If port Y is pressur-
ized, the main control spool is moved to the left (P to A and
B to T).
The pilot pressure at the main valve must not exceed 25 bar
(16 bar with size 52)!
Type .WRH…-7X/…
Notice!
Due to the design principle, internal leakage is inherent to the
valves, which may increase over the life cycle.
Technical data (for applications outside these parameters, please consult us!)
general
Valve type .WRZ .WRZE .WRH
Installation position Any, preferably horizontal
(for commissioning information, see data sheet 07800)
Storage temperature range °C –20 to +80
Ambient temperature range °C –20 to +70 –20 to +50 –20 to +70
Weight – Subplate mounting Size 10 kg 7.8 8.0 6.1
Size 16 kg 11.9 12.1 9.7
Size 25 kg 18.2 18.4 18.0
Size 32 kg 42.2 42.2 41.5
Size 52 kg 79.5 79.7
– Flange connection Size 52 kg 77.5 77.7
– With "D3" kg +0.5 in addition
Sine test according to DIN EN 60068-2-6:2008 10 cycles, 10...2000...10 Hz with logarithmic frequency
changing speed of 1 oct./min.,
5 to 57 Hz, amplitude 1.5 mm (p-p),
57 to 2000 Hz, amplitude 10 g, 3 axes
Random test according to DIN EN 60068-2-64:2009 20…2000Hz,amplitude0.05g
2
/Hz (10 g
RMS
)
3 axes, 30 min testing time per axis
Shock test according to DIN EN 60068-2-27:2010 Half sine 15 g/11 ms, 3 times in positive/3 times in negative
direction per axis, 3 axes
Humid heat, cyclic according to DIN EN 60068-2-30:2006 Variant 2
+25°Cto+55°C,90%to97%relativehumidity,
2 cycles at 24 hours each
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
11/28
Technical data (for applications outside these parameters, please consult us!)
hydraulic (measured with HLP46, ϑ
oil
= 40 °C ± 5 °C and p = 100 bar)
Size Size 10 16 25 32 52
Operating pressure
30 to 100– Pilot control valve External pilot oil supply bar 20 to 100
Internal pilot oil supply
–
bar 100 to
315 only
with "D3"
100 to 350 only with "D3"
– Main valve bar Up to 315 Up to 350 Up to 350 Up to 350 Up to 350
Return flow pressure – Port T (port R)
(external pilot oil return)
bar Up to 315 Up to 250 Up to 250 Up to 150 Up to 250
– Port T
(internal pilot oil return)
bar Up to 30 Up to 30 Up to 30 Up to 30
–
– Port Y bar Up to 30 Up to 30 Up to 30 Up to 30 Up to 30
Flow of the main valve l/min Up to 170 Up to 460 Up to 870
Up to 1600 Up to 2800
Pilot flow at ports X and Y
withsteppedinputsignal0→100%
l/min 3.5 5.5 7 15.9 7
Pilot volume
forswitchingprocess0→100%
cm
3
1.7 4.6 10 26.5 54.3
Hydraulic fluid See table below
Hydraulic fluid temperature range
(at the valve working ports)
°C –20 to +80 (preferably +40 to +50)
Viscosity range mm
2
/s 20 to 380 (preferably 30 to 46)
Maximum admissible degree of contamination of the hydraulic
fluid, cleanliness class according to ISO 4406 (c)
– Pilot control valve Class 18/16/13
1)
– Main valve Class 20/18/15
1)
Hysteresis % ≤6
1)
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
Hydraulic fluid Classification Suitable sealing materials Standards
Mineral oils and related hydrocarbons HL, HLP NBR,FKM DIN 51524
Flame-resistant – 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 hydrau-
lic fluids refer to data sheet 90220 or contact us!
– There may be limitations regarding the technical valve
data (temperature, pressure range, life cycle, maintenance
intervals, etc.)!
– The flash point of the process and operating medium used
mustbe40Kgreaterthanthemaximumsolenoidsur-
face temperature.
– Flame-resistant – containing water: The maximum pres-
sure differential per control edge is 175 bar. Pressure pre-
loading at the tank port > 20%ofthepressuredifferential;
otherwise, increased cavitation.
– Life cycle as compared to operation with mineral oil HL,
HLP50%to100%
12/28 Bosch Rexroth AG Hydraulics
.WRZ; .WRZE; .WRH RE 29115/08.13
electric
Valve type .WRZ
1)
.WRZE
Voltage type Direct voltage
Command value overlap % 15
Maximum current A 1.5 2.5
Solenoid coil resistance – Cold value at 20 °C Ω 4.8 2
– Maximum hot value Ω 7.2 3
Duty cycle % 100
Maximum coil temperature
3)
°C 150
Protection class of the valve according to EN 60529 IP65 with mating connectors mounted and locked
Control electronics
Type 4WRZ Digital amplifier in Euro-card format
2)
VT-VSPD-1-2X/... according to data sheet 30523
Analog amplifier in Euro-card format
2)
with 1 ramp time
VT-VSPA2-1-2X/V0/T1, according to data sheet 30110
Analog amplifier in Euro-card format
2)
with 5 ramp times
VT-VSPA2-1-2X/V0/T5, according to data sheet 30110
Analog module amplifier
2)
VT-11118-1X/... according to data sheet 30218
Type 4WRZE Integrated in the valve, see page 14
Analog command value module
2)
VT- SWMA-1-1X/... according to data sheet 29902
Analog command value module
2)
VT-SWMAK-1-1X/...accordingtodatasheet29903
Digital command value card
2)
VT-HACD-1-1X/…accordingtodatasheet30143
Analog command value card
2)
VT-SWKA-1-1X/...accordingtodatasheet30255
Current consumption I
max
A
―
1.8
– Impulse current A
―
3
Command value signal – Voltage input "A1" V
―
±10
– Current input "F1" mA
―
4 to 20
1)
With Bosch Rexroth AG control electronics
2)
Separate order
3)
Due to the temperatures occurring at the surfaces of the
solenoid coils, the European standards ISO 13732-1 and
EN 982 need to be adhered to.
Technical data (for applications outside these parameters, please consult us!)
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
13/28
Electrical connection
For type .WRZ... (for external electronics – not with version "J" = seawater-resistant)
For type .WRZE... (with integrated electronics (OBE) and with version "J" = seawater-resistant)
Connection at the connector Connection to mating connector








to the amplifier to the amplifier
For type .WRZ... (for external electronics – with version "J" = seawater-resistant)
External electronics
Contact Connection with
A Solenoid A
B Solenoid B
C Solenoid A
D Solenoid B
E n.c.
F n.c.
PE Valve housing
Connector pin assignment Contact Signal with A1 Signal at F1
Supply voltage A 24 VDC (u(t) = 19.4 to 35 V); I
max
= 2 A
B 0 V
Reference (actual value) C Cannot be used
1)
Differential amplifier input D ±10 V; R
e
>50kΩ 4 to 20 mA; R
e
>100Ω
(Command value) E Command value reference potential
F Cannot be used
1)
Protective grounding conductor PE Connected to cooling element and valve housing
1)
Contacts C and F must not be connected!
Command value: A positive command value (0 to 10 V or 12 to 20 mA) at D and a reference potential at E result in a flow from
P to A and B to T.
A negative command value (0 to –10 V or 12 to 4 mA) at D and a reference potential at E result in a flow
from P to B and A to T.
If the valve and the solenoid are on side "a" (control spool variants EA and W6A), a positive command value
at D and a reference potential at E result in flow from P to B and A to T.
Connection cable: Recommendation: – Up to 25 m cable length, type LiYCY 5 x 0.75 mm
2
– Up to 50 m 25 m cable length, type LiYCY 5 x 1.0 mm
2
External diameter 6.5 to 11 mm
Only install the shield on the supply side on the protective grounding conductor.
For mating connectors, see page 27
For mating connectors, see page 27
For mating connectors, see page 27
14/28 Bosch Rexroth AG Hydraulics





.WRZ; .WRZE; .WRH RE 29115/08.13
Block diagram of the integrated electronics (OBE) for type WRZE
Supply
voltage:
Differential
amplifier
Summing
device
Locking
Undervoltage
detection
Step function
generator
Ramp
generator
3)
Protective
grounding
conductor
1, 2)
1)
Port PE is connected to the cooling element and the valve housing
2)
The protective grounding conductor is screwed to the valve housing and cover
3)
Ramp can be set from 0 to 2.5 s from the outside, identical for T
up
and T
down
4)
The output stages are current-controlled
Command value
Output stage
4)
Output stage
4)
Power supply unit
4)
Interface Integrated electronics (OBE) Valve
24 V
GND
Reference
potential
Hydraulics Bosch Rexroth AG

















 






 




 












RE 29115/08.13 .WRZ; .WRZE; .WRH
15/28
Transition functions with stepped, electric input signals, measured at p
St
= 50 bar
Type 4WRZ...
Strokein%→
Signalchangein%
Signalchangein%Type 4WRZE...
∆p = valve pressure differential according to DIN 24311 (inlet pressure p
P
minus load pressure p
L
minus return flow pressure p
T
)
Flow in l/min →Flow in l/min →Flow in l/min →
Commandvaluein%→
Commandvaluein%→
Commandvaluein%→
25 l/min rated flow at 10 bar valve pressure differential
50 l/min rated flow at 10 bar valve pressure differential
85 l/min rated flow at 10 bar valve pressure differential
Strokein%→
Time in ms → Time in ms →
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
Time in ms
→ Time in ms →
P → A/B → T
or
P
→ B/A → T
P → A/B → T
or
P
→ B/A → T
P → A/B → T
or
P
→ B/A → T
Characteristic curves size 10 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
16/28 Bosch Rexroth AG Hydraulics

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

 

.WRZ; .WRZE; .WRH RE 29115/08.13






 







 










 




∆p = valve pressure differential according to DIN 24311 (inlet pressure p
P
minus load pressure p
L
minus return flow pressure p
T
)
Flow in l/min →Flow in l/min →
Commandvaluein%→
Commandvaluein%→
100 l/min rated flow at 10 bar valve pressure differential
125 l/min rated flow at 10 bar valve pressure differential
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
P → A/B → T
or
P
→ B/A → T
P → A/B → T
or
P
→ B/A → T
Flow in l/min →Flow in l/min →
Commandvaluein%→
Commandvaluein%→
150 l/min rated flow at 10 bar valve pressure differential
180 l/min rated flow at 10 bar valve pressure differential
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
P → A/B → T
or
P
→ B/A → T
P → A/B → T
or
P
→ B/A → T
Characteristic curves size 16 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
17/28
























Transition functions with stepped, electric input signals, measured at p
St
= 50 bar
Type 4WRZ...
Strokein%→
Signalchangein%
Signalchangein%
Type 4WRZE...
Strokein%→
Time in ms → Time in ms →
Time in ms → Time in ms →
Characteristic curves size 16 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
18/28 Bosch Rexroth AG Hydraulics





















 








 












.WRZ; .WRZE; .WRH RE 29115/08.13
Transition functions with stepped, electric input signals, measured at p
St
= 50 bar
Type 4WRZ...
Strokein%→
Signalchangein%
Signalchangein%Type 4WRZE...
∆p = valve pressure differential according to DIN 24311 (inlet pressure p
P
minus load pressure p
L
minus return flow pressure p
T
)
Flow in l/min →Flow in l/min →
Commandvaluein%→
Commandvaluein%→
P → A/B → T
or
P
→ B/A → T
220 l/min rated flow at 10 bar valve pressure differential
325 l/min rated flow at 10 bar valve pressure differential
Strokein%→
Time in ms → Time in ms →
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
Time in ms
→ Time in ms →
P → A/B → T
or
P
→ B/A → T
Characteristic curves size 25 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
Hydraulics Bosch Rexroth AG

















 






 












RE 29115/08.13 .WRZ; .WRZE; .WRH
19/28
Transition functions with stepped, electric input signals, measured at p
St
= 50 bar
Type 4WRZ...
Strokein%→
Signalchangein%
Signalchangein%Type 4WRZE...
∆p = valve pressure differential according to DIN 24311 (inlet pressure p
P
minus load pressure p
L
minus return flow pressure p
T
)
Flow in l/min →Flow in l/min →
Commandvaluein%→
Commandvaluein%→
360 l/min rated flow at 10 bar valve pressure differential
520 l/min rated flow at 10 bar valve pressure differential
Strokein%→
Time in ms → Time in ms →
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
Time in ms
→ Time in ms →
P → A/B → T
or
P
→ B/A → T
P → A/B → T
or
P
→ B/A → T
Characteristic curves size 32 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
20/28 Bosch Rexroth AG Hydraulics
        







































.WRZ; .WRZE; .WRH RE 29115/08.13
Transition functions with stepped, electric input signals, measured at p
St
= 50 bar
Type .WRZ…
Strokein%→
Signalchangein%
Signalchangein%Type .WRZE…
∆p = valve pressure differential according to DIN 24311 (inlet pressure p
P
minus load pressure p
L
minus return flow pressure p
T
)
Flow in l/min →
Commandvaluein%→
1000 l/min rated flow at 10 bar valve pressure differential
Strokein%→
Time in ms → Time in ms →
1 ∆p
= 10 bar, constant
2 ∆p
= 20 bar, constant
3 ∆p
= 30 bar, constant
4 ∆p
= 50 bar, constant
5 ∆p
= 100 bar, constant
Time in ms
→ Time in ms →
P → A/B → T
or
P
→ B/A → T
Characteristic curves size 52 (control spool "E, W6-, EA, W6A" as well as HLP46, ϑ
oil
= 40 °C ±5 °C and p = 100 bar)
Hydraulics Bosch Rexroth AG



 
 



























 











For subplates and valve mounting screws, see page 27
RE 29115/08.13 .WRZ; .WRZE; .WRH
21/28
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..." (not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A", separate order, see page 27
8 Mating connector "B", separate order, see page 27
9 Mating connector, separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Pressure reducing valve "D3"
16 Identical seal rings for ports A, B, P, T, and T1
17 Identical seal rings for ports X and Y
18 Space required to remove the mating connector
19 Diversion plate (type 4WRH...)
20 Machined installation surface, porting pattern according
to ISO 4401-05-05-0-05, ports X and Y as required


Required surface quality of
the valve contact surface
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Size 10 (dimensions in mm)
22/28 Bosch Rexroth AG Hydraulics
For subplates and valve mounting screws, see page 27
"a""b"
B
A
50
35
69,9
Ø 11
Ø 6,6
101,6
A
B
Ø 18
Ø 11
PX
T
34,1
1,5 1,6
Y
T
B
A
P
20
10
27
100,5
154
96
12
15
19
1
13
17
16
5
2
7
18
6
3
116
18
94
4
292
15
Pg11
227
156,5
44
Ø 3
3 43
21
48
8
12
14
9
11
164
160
29
94
12
F1
F2
P
BA
X
T
F3
F4
Y
F5
F6
G2
G1
20
93
15
190 (210)
.WRZ; .WRZE; .WRH RE 29115/08.13
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..." (not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A", separate order, see page 27
8 Mating connector "B", separate order, see page 27
9 Mating connector, separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Pressure reducing valve "D3"
16 Identical seal rings for ports A, B, P, and T
17 Identical seal rings for ports X and Y
18 Space required to remove the mating connector
19 Diversion plate (type 4WRH...)
20 Machined installation surface, porting pattern according to
ISO 4401-07-07-0-05, ports X and Y as required
deviating from the standard: Ports A, B, P, T Ø20 mm.
21 Locking pin


Required surface quality of
the valve contact surface
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Size 16 (dimensions in mm)
Hydraulics Bosch Rexroth AG
Ø 20
Ø 14
414
Ø 6
21
19
122
366
191
19
16
17
10
5
2
7
18
6
3
116
15
18
9
14
15
94
4
Pg11
1
12
15
227
156,5
13
P
B
A
T
76,5
130
B
P
Y
T
X
A
46
92
118
53
44
48
8
12
11
225
20
F1
F2
P
B
A
X
T
F
3
F4
Y
F
5
F6
G2
G1
195
21
120
14
126
20
"a""b"
B
A
220 (240)
For subplates and valve mounting screws, see page 27
RE 29115/08.13 .WRZ; .WRZE; .WRH
23/28
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..." (not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A", separate order, see page 27
8 Mating connector "B", separate order, see page 27
9 Mating connector, separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Pressure reducing valve "D3"
16 Identical seal rings for ports A, B, P, and T
17 Identical seal rings for ports X and Y
18 Space required for removing the mating connector
19 Diversion plate (type 4WRH...)
20 Machined installation surface, porting pattern according
to ISO 4401-08-08-0-05,
ports X and Y as required
21 Locking pin


Required surface quality of
the valve contact surface
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Size 25 (dimensions in mm)
24/28 Bosch Rexroth AG Hydraulics
254
21,5
176
500
152
94
15
116
16
Pg11
17
7
12
2
5
8149
18
3
4
18
116
10
15
19
12
1
15
227
156,5
20
197
49
4
Ø 33
Ø 21
Ø 6
44
21
TPY
XA B
114,3
190,5
76,2
19
158,8
79,5
13
P
B
A
T
48
302,5
F1 F2
P
B
A
X
T
F3
F4
Y
F5
F6
G2
G1
257
23
200
20,5
20
"a"
"b"
B
A
246 (266)
For subplates and valve mounting screws, see page 27
.WRZ; .WRZE; .WRH RE 29115/08.13
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..." (not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A", separate order, see page 27
8 Mating connector "B", separate order, see page 27
9 Mating connector, separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Pressure reducing valve "D3"
16 Identical seal rings for ports A, B, P, and T
17 Identical seal rings for ports X and Y
18 Space required for removing the mating connector
19 Diversion plate (type 4WRH...)
20 Machined installation surface, porting pattern according
to ISO 4401-10-09-0-05, ports X and Y as required devi-
ating from the standard:
– Ports A, B, T and P Ø38 mm.
21 Locking pin


Required surface quality of
the valve contact surface
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Size 32 (dimensions in mm)
Hydraulics Bosch Rexroth AG
571
16
15
1
86714917 122
5
22
Pg11
15
226
156.5
158
68
233
129
Ø 33
Ø 22
B
47,5
155
262,5
310
207,5
102,5
A
TP
R
190
13
P
310
260
207,5
155
102,5
50
360
25
25
21
B
A
X
T
P
R
Y
277,5
262,5
47,5
155
140
35
40
240
190
Ø 46
M20
max. Ø 15
496
max. Ø 15
19,5
44
20
20 19
48
11
4
17
10
94
15
3
116
"b"
"a"
A
B
18
B
A
T
30
282 (302)
For subplates and valve mounting screws,
see page 27


Required surface quality of
the valve contact surface
RE 29115/08.13 .WRZ; .WRZE; .WRH
25/28
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..."
(not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A"
8 Mating connector "B"
9 Mating connector,
separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Identical seal rings for ports A, B, P, T, and R
16 Identical seal rings for ports X, Y, and L
17 Space required to remove the mating connector
18 Adapter plate
19 Pressure reducing valve "D3"
20 Diversion plate (type 4WRH...)
21 Machined installation surface, porting pattern,
ports X and Y as required
22 Transport aid
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Subplate mounting size 52 (dimensions in mm)
26/28 Bosch Rexroth AG Hydraulics
BATP
202
170
98
66
571
97
474
Ø 20
Ø 14
175
100
20
53
Ø98
94
15
116
Pg11
7122
6
814915
3
4
15
11
5
10
18
16
15
19
M16; 28
19,5
227
156,5
A
T
P
170
140
62
154
118
266
Ø 20
Ø 14
X
Y
13 1
B
P
B
A
T
G1/2; 18
"b"
"a"
A
B
30
17
299 (319)
.WRZ; .WRZE; .WRH RE 29115/08.13
1 Main valve
2 Pilot control valve
3 Dimension for version "4WRZ..." (not seawater-resistant)
4 Dimension for version "4WRZE..."
5 Proportional solenoid "a"
6 Proportional solenoid "b"
7 Mating connector "A", separate order, see page 27
8 Mating connector "B", separate order, see page 27
9 Mating connector, separate order, see page 27
10 Concealed manual override "N9"
11 Plug screw for valves with one solenoid
12 Name plate for pilot control valve
13 Name plate for main valve
14 Integrated electronics (OBE)
15 Space required to remove the mating connector
16 Adapter plate
17 Pressure reducing valve "D3"
18 Diversion plate (type 4WRH...)
19 Transport aid
For subplates and valve mounting screws, see page 27
1)
without pressure reducing valve
2)
with pressure reducing valve
1) 2)
Dimensions: Flange connection size 52 (dimensions in mm)
Hydraulics Bosch Rexroth AG
RE 29115/08.13 .WRZ; .WRZE; .WRH
27/28
Accessories (not included in the scope of delivery)
Subplates/connection flanges Data sheet
Size 10 45054
Size 16 45056
Size 25 45058
Size 32 45060
Size 52 45501
Mating connectors Material number
Mating connector for 4WRZ DIN EN 175301-803 Solenoid "a", grey R901017010
Solenoid "b", black R901017011
Mating connector for 4WRZE DIN EN 175201-804 e.g. R900021267 (plastic)
and 4WRZE...J... e.g. R900223890 (metal)
Hexagon socket head cap screws Material number
Size 10 4x ISO 4762 - M6 x 45 - 10.9-flZn-240h-L
Tightening torque M
A
=13.5Nm±10%
or
4x ISO 4762 - M6 x 45 - 10.9
Tightening torque M
A
=15.5Nm±10%
R913000258
Size 16 2x ISO 4762 - M6 x 60 - 10.9-flZn-240h-L
Tightening torque M
A
=12.2Nm±10%
4x ISO 4762 - M10 x 60 - 10.9-flZn-240h-L
Tightening torque M
A
=58Nm±20%
or
2x ISO 4762 - M6 x 60 - 10.9
Tightening torque M
A
=15.5Nm±10%
4x ISO 4762 - M10 x 60 - 10.9
Tightening torque M
A
=75Nm±20%
R913000115
R913000116
Size 25 6x ISO 4762 - M12 x 60 - 10.9-flZn-240h-L
Tightening torque M
A
=100Nm±20%
or
6x ISO 4762 - M12 x 60 - 10.9
Tightening torque M
A
=130Nm±20%
R913000121
Size 32 6x ISO 4762 - M20 x 80 - 10.9-flZn-240h-L
Tightening torque M
A
=340Nm±20%
or
6x ISO 4762 - M20 x 80 - 10.9
Tightening torque M
A
=430Nm±20%
R901035246
Size 52
(5WRZ52)
With a steel installation surface:
7x ISO 4762 - M20 x 90 - 10.9-flZn-240h-L
Tightening torque M
A
=465Nm±20%
With a cast iron installation surface:
7x ISO 4762 - M20 x 100 - 10.9-flZn-240h-L
Tightening torque M
A
=465Nm±20%
or
With a steel installation surface:
7x ISO 4762 - M20 x 90 - 10.9
Tightening torque M
A
=610Nm±20%
With a cast iron installation surface:
7x ISO 4762 - M20 x 100 - 10.9
Tightening torque M
A
=610Nm±20%
R913000397
R913000386
Size 52
(4WRZ52)
4x ISO 4762 - M12 x 70 - 10.9-flZn-240h-L
Tightening torque M
A
=100Nm±20%
or
4x ISO 4762 - M12 x 70 - 10.9
Tightening torque M
A
=130Nm±20%
R913000515
Throttle insert Ø
in mm Material number
Size 10 1.8 R900158510
Size 16 2.0 R900158547
Size 25 2.8 R900157948
Size 32 - -
Size 52 - -
When using type 4WRZ..., use the following throttle inserts in
channel A and B of the pilot control valve:
28/28 Bosch Rexroth AG Hydraulics
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
.WRZ; .WRZE; .WRH RE 29115/08.13
© This document, as well as the data, specifications and other informa-
tion 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 applica-
tion 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.
Notes