1/12
Information on available spare parts:
www.boschrexroth.com/spc
4/2 and 4/3 directional shut-off
valves, internally pilot operated,
externally pilot operated
Types Z4WEH and Z4WH
Size 25
Component series 5X
Maximum operating pressure 315 bar
Maximum flow 650 l/min
RE 24768/08.08
Replaces: 10.97
Table of contents Features
Content Page
Features 1
Ordering code 2, 3
Mating connectors 3
Symbols 4
Function, section 5
Pilot oil supply 6
Technical data 7
Switching times 8
Characteristic curves 8
Unit dimensions 9, 10
Stroke adjustment, attachment options 11
H5854
– Directional spool valve, pilot operated
– 2 types of actuation:
• Electrohydraulic (type WEH)
• Hydraulic (type WH)
– Function as shut-off through valve or shut-off/through valve/
short-circuit valve
– Free flow in P and T in every spool position
– Porting pattern to ISO 4401-08-08-0-05
– Wet-pin DC or AC voltage solenoids, optional
– Manual override, optional
– Electrical connection as individual connection, see
RE 23178 and RE 08010 (central connection on request)
– Switching time adjustment, optional
– Stroke adjustment am main spool, optional
– Inductive position switches and proximity sensors (contact-
less), see RE 24830
Inhalt
Table of contents 1
Features 1
Ordering code 2
3
Mating connectors to DIN EN 175301-803 3
Symbols: Type Z4WEH (① = component side, ② = plate side) 4
Symbols: Type Z4WH (① = component side, ② = plate side) 4
Function, section 5
Pilot oil supply 6
Technical data (for applications outside these parameters,
please consult us!) 7
Switching times (= making contact on the pilot valve until the
control land starts to open in the main valve and change of the
pressure value by 5%) 8
Characteristic curves (measured with HLP46, ϑ
oil
= 40 °C ±5
°C) 8
Unit dimensions: Type Z4WEH22 (dimensions in mm) 9
Unit dimensions: Type Z4WH22 (dimensions in mm) 10
Stroke adjustment, attachment options (dimensions in mm) 11
Notes 12
Standard types and components are shown in
the EPS (standard price list).
2/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
Ordering code
Types of actuation
Electrohydraulic = WEH
Hydraulic = WH
Size 25 = 22
Spool symbols see page 4
Component series 50 to 59 = 5X
(50 to 59: unchanged installation and connection dimensions)
Pilot valve
High-performance valve (RE 23178) = 6E
1)
DC voltage 24 V = G24
1)
AC voltage 230 V 50/60 Hz = W230
1)
DC voltage 205 V 50/60 Hz = G205
1; 2)
For further voltages, frequencies and electrical data, see data sheet RE 23178
Without manual override = No code
With manual override = N
1)
With concealed manual override (standard) = N9
1)
External pilot oil supply, external pilot oil drain
= No code
Internal pilot oil supply, internal pilot oil drain (standard) = ET
3)
External pilot oil supply, internal pilot oil drain = T
(with type Z4WH… only “No code“ possible!)
Without switching time adjustment = No code
Switching time adjustment as meter-in control = S
Switching time adjustment as meter-out control = S2
1)
Only in the case of electrohydraulic actuation, version
“WEH“
2)
For connection to the AC voltage mains, a DC solenoid
must be used, which is controlled via a rectifier (see table
on the right-hand side).
In the case of individual connection, a mating connector
with integrated rectifier can be used (separate order, see
page 3.
3)
Internal pilot oil supply:
– Minimum pilot pressure: Please read page 6!
– To prevent impermissibly high pressure peaks, a throttle
insert “B10“ must be provided in the P port of the pilot
valve (see page 5).
4)
Mating connectors, separate order, see page 3.
5)
On version “D3“, a throttle insert “B10“ must be installed in
port P of the pilot valve!
Z4 22 5X
AC voltage mains
(permissible voltage
tolerance ±10%)
Nominal voltage of the
DC voltage solenoid
when operated with AC
voltage
Ordering
code
110 V - 50/60 Hz
120 V - 60 Hz
96 V
G96
230 V - 50/60 Hz 205 V G205
Hydraulics Bosch Rexroth AGRE 24768/08.08 Z4WEH; Z4WH
3/12
Further details in clear text
Seal material
No code = NBR seals
V = FKM seals
(other seals on request)
Attention!
Observe compatibility of seals with hydraulic fluid used!
No code = Without pressure reducing valve
D3
1; 5)
= With pressure reducing valve (to be used, if pilot pressure > 210 bar)
Throttle insert
1)
No code = Without throttle insert
B08 = Throttle Ø 0.8 mm
B10 = Throttle Ø 1.0 mm
Stroke adjustment
No code = Without stroke adjustment
10 = Stroke adjustment on sides A and B
11 = Stroke adjustment on side A
12 = Stroke adjustment on side B
For further details, see page 11
Without slash = No further details
/ = Further details
Spool position monitoring
No code = Without position switch
QMAG24 = Monitored spool position “a“
QMBG24 = Monitored spool position “b“
QMABG24 = Monitored spool positions “a“ and “b“
QM0G24 = Monitored rest position (not for valves with 2 spool positions)
For further details, see RE 24830
Electrical connection
1)
K4
4)
= Without mating connector, individual connection with component plug to DIN EN 175301-803
For further electrical connections, see RE 23178 and RE 08010
K4
*
Mating connectors to DIN EN 175301-803
For details and fur-
ther mating con-
nectors,
see RE 08006
Valve
side Color
Material no.
Without circuitry
With indicator lamp
12 … 240 V
With rectifier
12 … 240 V
With indicator lamp and
Zener-diode suppressor
circuit
24 V
a Gray R901017010 – – –
b Black R901017011 – – –
a/b Black – R901017022 R901017025 R901017026
4/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
Symbols: Type Z4WEH (① = component side, ② = plate side)
Order-
ing
code
Version
“ET“
Version
“T“
E62
1
2
X
ab
Y
PTXAB Y
1
2
X
ab
Y
PTXAB Y
E63
1
2
X
ab
Y
PTXAB Y
1
2
X
ab
Y
PTXAB Y
Symbols: Type Z4WH (① = component side, ② = plate side)
Order-
ing
code
Version
“No code“
E62
1
2
X
a
b
Y
PTXAB Y
E63
1
2
X
a
b
Y
PTXAB Y
A
T
B
P
"b" "a"
X
Y
ABBA
1
2 2
1
Z
Z
TP
3.2
7
5
4
2 1
3.1
5
6
11
Hydraulics Bosch Rexroth AGRE 24768/08.08 Z4WEH; Z4WH
5/12
Function, section
Type Z4WEH 22 E62-5X/6E...N9ET..
① = component side
② = plate side
Pilot oil supply (section Z – Z), see page 6.
Valves of type Z4WEH are directional spool valves with elec-
trohydraulic actuation. They control the start and stop of a
flow.
These directional valves basically consist of the main valve
with housing (1), main control spool (2), one or two return
springs (3.1 and 3.2), as well as pilot valve (4).
Main control spool (2) in the main valve is held by springs or
through pressurization in the zero or initial position. In the ini-
tial position, the two spring chambers (6) and (7) are connect-
ed pressureless to tank via pilot channel (4). The pilot valve
is supplied with pilot oil via pilot line (11). The supply can be
provided internally or externally (externally via port X in the
sandwich plate, see page 6).
When the pilot valve is operated, e.g. solenoid “a“, the pilot
spool (not shown on the drawing) is pushed to the left and
spring chamber (7) is consequently pressurized to pilot pres-
sure. Spring chamber (6) remains pressureless.
The pilot pressure acts on the left side of main control spool
(2) and pushes it against spring (3.1). In the main valve the
ports are connected on the component side and on the plate
side depending on the symbol.
When the solenoid is de-energized, the pilot spool returns to
its initial position. Spring chamber (7) is unloaded to tank.
The pilot oil is drained internally from spring chamber (7) via
pilot valve (4) into channel T (Y).
An optional manual override (5) allows the pilot spool to be
moved without energization of the solenoid.
X
Z–Z
8
9
G1/4
P
P
10
6/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
Pilot oil supply
External: 8 closed
9 open
internal: 8 open
9 closed
Pilot oil port “X“ only possible with Z4WEH 22 ... .
Throttle insert
The use of throttle insert (10) is required, if the pilot oil supply
is to be limited in channel P of the pilot valve.
Throttle insert (10) is to be installed in channel P of the pilot
valve.
Pilot oil supply
Hydraulics Bosch Rexroth AGRE 24768/08.08 Z4WEH; Z4WH
7/12
Technical data (for applications outside these parameters, please consult us!)
General
Masse – Valve with 1 solenoid kg 20.8
– Valve with 2 solenoids kg 21.1
– Valve with hydraulic actuation
(type 4WH…)
kg 20.0
– Switching time adjustment kg 0.8
– Pressure reducing valve kg 0.4
– Plate for version “T“ kg 0.5
Installation position Optional
Ambient temperature range °C –30 to +50 (NBR seals)
–20 to +50 (FKM seals)
Hydraulic
Maximum oper-
ating pressure
– Ports A, B, X and Y bar 315
– Port P
External pilot oil supply bar 315
Internal pilot oil supply bar 210 (without pressure reducing valve)
315 (with pressure reducing valve)
– Port T
(Only internal pilot oil drain)
bar 210 (version “WEH“ with DC solenoid)
160 (version “WEH“ with AC solenoid)
315 (version “WH“)
Minimum pilot pressure bar 12
Maximum pilot pressure bar 210
Maximum flow l/min 650
Pilot volume for operation cm
3
7,7
Hydraulic fluid
1)
Mineral oil (HL, HLP) to DIN 51524
2)
; fast bio-degradable
hydraulic fluids to VDMA 24568 (see also RE 90221); HETG
(rape seed oil)
2)
; HEPG (polyglycols)
3)
; HEES (synthetic
esters)
3)
; other hydraulic fluids on request
Hydraulic fluid temperature range °C –30 to +80 (NBR seals)
–20 to +80 (FKM seals)
Viscosity range mm
2
/s 2.8 to 500
Permissible max. degree of contamination of the
hydraulic fluid - cleanliness class to ISO 4406 (c)
Class 20/18/15
4)
1)
The ignition temperature of the process and operating
medium used must be higher than the maximum solenoid
surface temperature.
2)
Suitable for NBR and FKM seals
3)
Suitable only for FKM seals
4)
The cleanliness classes specified for components must be
adhered to in hydraulic systems. Effective filtration prevents
malfunction and, at the same time, prolongs the service life
of components.
For the selection of filters, see data sheets RE 50070,
RE 50076, RE 50081, RE 50086, RE 50087 and RE 50088.
Notes!
– The manual override can only be actuated up to a tank
pressure of ca. 50 bar. Avoid damage to the bore for the
manual override! (Special tool for operation, separate or-
der, Material no. R900024943). When the manual override
is blocked, operation of the solenoids must be ruled out!
– The simultaneous operation of the solenoids must be ruled
out!
0
100
200
300
400
500
600
0
5
10
1
2; 3
5
4
15
20
25
30
35
40
700
0
100
200
300
400
500
600
0
5
10
2
7
4
15
20
25
30
35
40
700
6
8/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
Switching times (= making contact on the pilot valve until the control land starts to open in the
main valve and change of the pressure value by 5%)
ON – AC voltage (~) and DC voltage (=)
Pilot pressure bar 70 140 210
Type of voltage ~ = ~ = ~ =
3-position valve (spring-centered)
– Version “ET“ (with throttle insert “B10“) ms 80 115 60 85 50 75
–
Version “ET“ (with pressure reducing valve “D3; 45 bar“)
ms 80 80 65 75 50 65
– Version “T“ ms 30 50 20 50 20 50
2-position valve (spring end position)
– Version “ET“ (with throttle insert “B10“) ms 100 140 70 100 50 75
–
Version “ET“ (with pressure reducing valve “D3; 45 bar“)
ms 110 125 65 95 50 75
– Version “T“ ms 45 65 40 60 55 85
OFF – AC voltage (~) and DC voltage (=)
Pilot pressure bar 70 140 210
Type of voltage ~ = ~ = ~ =
3-position valve (spring-centered)
– Version “ET“ (with throttle insert “B10“) ms 60 50 60 50 60 50
–
Version “ET“ (with pressure reducing valve “D3; 45 bar“)
ms 85 50 85 50 85 50
– version “T“ ms 55 50 55 50 55 50
2-position valve (spring end position)
– Version “ET“ (with throttle insert “B10“) ms 175 160 160 140 150 130
–
Version “ET“ (with pressure reducing valve “D3; 45 bar“)
ms 175 150 150 120 140 110
– Version “T“ ms 110 55 100 45 95 40
Characteristic curves (measured with HLP46, ϑ
oil
= 40 °C ±5 °C)
Flow in l/min → Flow in l/min →
Pressure differential in bar →
Pressure differential in bar →
∆p-q
V
characteristic curves
Version "E62" Version "E63"
1 A2 → A1
2 B2 → B1
3 B1 → B2; B2 → A2
4 P2 → P1; T2 → T1
5 A1 → A2; A2 → B2
6 A1 → A2
7 A2 → A1; B1 → B2
B A
85,5
15
25
40
28
16
9
714
7
5
“b” “a”
3,5
14 (17)
63
64
B
A
T
P
11
10
1
2
G1/4
75
50
100
48 202
F1
F2
F3
F4
G1
F5
F6
G2
19 (18)
104
2,5
45
153
AB
AB
TP
Y
XA B
X
X
17
1312
1
3
9
14
6
4
18
14
Hydraulics Bosch Rexroth AGRE 24768/08.08 Z4WEH; Z4WH
9/12
Unit dimensions: Type Z4WEH22 (dimensions in mm)
For explanations of items,
see page 10.
① component side - porting pattern
to ISO 4401-08-08-0-05
Required surface quality
of the valve mounting face
② plate side - porting pattern to
ISO 4401-08-08-0-05
Required surface quality
of the valve mounting face
AB
1
2
AB
46 200
100
25
1
3
40
17
15
Y
BA
G1/4
30 6
7 14
156
23
X
10/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
1 Nameplate of complete valve
2 Nameplate of pilot valve
3 Main valve
① = component side – porting pattern to
ISO 4401-08-08-0-05
② = plate side – porting pattern to
ISO 4401-08-08-0-05
4 Port X (G1/4) for external pilot control
5 Pressure reducing valve “D3”
(must be used in the case of pilot pressures above
210 bar; only for version “Z4WEH“)
Material no.:
NBR seals: R900323180
FKM seals: R900323664
Attention!
If a pressure reducing valve “D3“ is used, a throttle in-
sert “B10“ must be installed in port P of the pilot valve!
6 Switching time adjustment (throttle check valve, see
data sheet RE 27506); depending on the installation
position, meter-in or meter-out control (illustration: me-
ter-in control)
7 R-ring plate
8 Pilot valve (see data sheet RE 23178)
– Type 4WE 6 J.. with symbol E62
– Type 4WE 6 Y.. with symbol E63
9 Solenoids “a” and “b” (can be rotated 90°)
10 Dimension for valve without manual override
11 Dimension for valve with manual override “N“; dimen-
sions () for valve with AC solenoid
12 Dimension for valve with concealed manual override
“N9“; dimensions () for valve with AC solenoid without
manual override
13 Identical seal rings for ports A, B, P, T (main valve)
14 Identical seal rings for ports A, B, P, T
15 Pilot oil subplate
16 Space required to remove mating connector
17 Locating pin
18 Valve mounting bores
Valve mounting screws (separate order)
6 hexagon socket head cap screws
ISO 4762 - M12 - 10.9
Note!
The length and tightening torque of the valve mounting
screws must be calculated taking account of the components
mounted.
Unit dimensions: Type Z4WH22 (dimensions in mm)
Required surface quality (①, ②)
see page 9.
T
P
Y
XAB
L1 L1
19 20
F1
F2
F3
F4
F5
F6
Hydraulics Bosch Rexroth AGRE 24768/08.08 Z4WEH; Z4WH
11/12
Stroke adjustment, attachment options (dimensions in mm)
The stroke adjustment feature limits the stroke of the main
spool. The spool stroke can be reduced by loosening locknut
(19) and turning adjustment spindle (20) clockwise. The con-
trol chamber must be pressureless during this process.
Stroke 9.5 mm (1 turn = 1.5 mm stroke)
Attachment options Ordering
code
L1 L2
Stroke adjustment
on sides A and B
10 94 248
Stroke adjustment
on side A
11 94
Stroke adjustment
on side B
12 248
19 Locknut 24 A/F
20 Adjustment spindle, hexagon socket 6 A/F
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
Fax +49 (0) 93 52 / 18-23 58
documentation@boschrexroth.de
www.boschrexroth.de
© 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 verifica-
tion. It must be remembered that our products are subject to a natural
process of wear and aging.
12/12 Bosch Rexroth AG Hydraulics Z4WEH; Z4WH RE 24768/08.08
Notes