Explosion-proof hydraulic valves, Type WE...VE1

Explosion-proof hydraulic valves, Type WE...VE1
Explosion-proof hydraulic valves,
Type WE...VE1...
Operating instructions
RE 23178-VE1-B0/03.15
Replaces: -.Material Number:
R901413483
1/14
Directional spool valves, direct
operated, with solenoid actuation
RE 23178-VE1-B1/03.15
Type WE …VE1…
Size 6
Component series 6X
Maximum operating pressure 350 bar
Maximum flow 70 l/min
Actual product may differ
For explosive areas
Part I
Data sheet
Information on explosion protection:
– Area of application according to NEC 505: Class I, Zone 1
– Type of protection of the valve solenoid:
AEx e mb IIC T4 Gb according to
ANSI / ISA 60079-7
ANSI / ISA 60079-18
What you need to know about these operating instructions
These operating instructions apply to the explosion-proof version of Rexroth valves and consist of the following two parts:
Part I
Data sheet 23178-VE1-B1
Part II
Product-specific instructions 23178-VE1-B2
Operating instructions 23178-VE1-B0
For further information on the correct handling of Rexroth hydraulic products, refer to Data sheet 07800 “General product
information on hydraulic products”.
2/14
Bosch Rexroth AG
WE …VE1…
Hydraulics
Table of contents
Features2
Ordering code and scope of delivery
3
Symbols 4
Function, section
5
Technical data Information on explosion protection Electrical connection
6, 7
7
8, 9
Performance limits10
Characteristic curves11
Dimensions12
Installation conditions13
Features
– 4/3-, 4/2- or 3/2-way version
– For proper use in explosive atmospheres
– Porting pattern according to ISO 3/2/4401-0-05
– Subplates available in FE/ZN version (see page 12)
– Wet-pin DC solenoids
– Solenoid coil can be rotated by 90°
– Electrical connection as a single connection with pipe
thread NPT 1/2"
– Manual override, optional
RE 23178-VE1-B1
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
3/14
Ordering code and scope of delivery
WE 6
3 main ports
4 main ports
6X
E
VE1 Z2
No code =
V =
NBR seals
FKM seals
Note:
Observe compatibility of seals
with hydraulic fluid used.
= 3
= 4
Size 6
=6
No code =
Without throttle insert
B08 =
Throttle Ø 0.8 mm
B10 =
Throttle Ø 1.0 mm
B12 =
Throttle Ø 1.2 mm
Use if flow > performance limit of the
valve, effective in channel P
Symbols e.g. C, E, EA, EB, etc;
possible versions, see page 4
Component series 60 to 69
(60 to 69: unchanged installation and
connection dimensions)
= 6X
Spring return
Without spring return
without spring return with detent
= no code
=O
= OF
High-power solenoid
wet-pin, with detachable solenoid coil
Direct voltage 24 V
Direct voltage 110 V
With manual override (standard)
without manual override
Z2 =
=E
= G24
= G110
=N
= no code
Note: Valve operating instructions included in the scope of delivery.
VE1 =
Electrical connection
Solenoid with terminal box and
cable gland,
For details see chapter Electrical
connection
“Increased Safety” explosion protection,
For details, see information on explosion
protection page 7
RE 23178-VE1-B1
WE …VE1…
Bosch Rexroth AG
Hydraulics
Symbols


1) Example:
Symbol E with spool position “a” ordering
code ..EA..
2)For
valves with “G110” DC solenoids and detent,
only symbols C46/OF and D46/OF are admissible.
Further control spools on demand
4/14
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
5/14
Function, section
Directional valves of type WE are solenoid operated directional spool valves. They control the start, stop and direction
of a flow.
The directional valves basically consist of housing (1), one
or two solenoids (2), control spool (3), and one or two return
springs (4).
In the de-energized condition, the control spool (3) is held
in the central position or in the initial position by the return
springs (4) (except for impulse spools). The control spool (3)
is actuated by wet-pin solenoids (2).
To ensure proper functioning, make sure that the pressure chamber of the solenoid is filled with oil.
The force of the solenoid (2) acts via the plunger (5) on the
control spool (3) and pushes the latter from its rest position to
the required end position. This enables the required direction
of flow from P → A and B → T or P → B and A → T.
After solenoid (2) was de-excited, the return spring (4)
pushes the control spool (3) back to its rest position.
An optional manual override (6) allows the control spool (3) to
be moved without solenoid energization.
Type 4WE 6.. 6X/O...VE1... (only possible with
symbols A, C and D)
This version is a directional valve with two spool positions
and two solenoids without detent. In the de-energized condition, there is no defined spool position.
Type 4WE 6.. 6X/OF... VE1... (impulse spool, only possible
with symbols A, C and D)
This version is a directional valve with two spool positions,
two solenoids and one detent. It alternately locks the two
spools positions and the solenoid therefore does not need to
be permanently energized.
Note:
Pressure peaks in the tank line to two or several valves
can result in unintended control spool movements in
the case of valves with detent! We therefore recommend
that separate return lines be provided or a check valve
installed in the tank line.
Due to the design principle, internal leakage is inherent
to the valves, which may increase over the life cycle.
Prevent the tank pipe from running dry. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.
Throttle insert (type 4WE 6..6X/…VE1../B.. )
The use of a throttle insert is required when, due to prevailing operating conditions, flows can occur during the switching
processes, which exceed the performance limit of the valve.
It is inserted in channel P of the directional valve.
2
4
3 1
„a“
6
2
„b“
5
Type 4WE 6 E6X/.E..NVE1Z2...
A (P) B
T
Seal ring
6/14
Bosch Rexroth AG
WE …VE1…
Hydraulics
RE 23178-VE1-B1
Technical data
General
Installation position
any
Ambient temperature range
-20 … +60
Storage temperature range
+15 ... +30
Admissible vibration load
20 … 2000 Hz amplitude 0.05 g2/Hz (10 g RMS)
Weight
2.6 (with 1 solenoid); 4.0 (with 2 solenoids)
Surface protection
Galvanic coating
Hydraulic
Maximum operating pressure
Port A, B, P
bar 350
Port T
bar 210
Maximum flow
Flow cross-section
(Spool position 0)
With symbols A and B, port T must be used as the
leakage oil connection if the operating pressure
exceeds the admissible tank pressure.
l/min 70
with symbol Q
approx. 6% of nominal cross-section
with symbol W
approx. 3 % of nominal cross-section
Hydraulic fluid
See table below
Hydraulic fluid temperature range
°C -20 ... +80 (NBR seals)
-15 ... +80 (FKM seals)
mm2/s
Viscosity range
Maximum admissible degree of contamination of
the hydraulic fluid cleanliness class according to
ISO 4406 (c)
Hydraulic fluid
Class 20/18/15 1)
Suitable sealing Standards
Data sheet
materials
Mineral oils
HL, HLP, HLPD, HVLP, HVLPD NBR, FKM
DIN 51524
90220
Bio-degradable
– Insoluble in
HETG
NBR, FKM
ISO 15380
90221
water
HEES
FKM
– Soluble in water HEPG
FKM
ISO 15380
– There may be limitations regarding the technical valve
Important information on hydraulic fluids:
data (temperature, pressure range, life cycle, maintenance
– For more information and data about the use of other hyintervals, etc.)!
draulic fluids, refer to the data sheets above or contact us!
– Ignition temperature of the hydraulic fluid used > 180 °C
1)The
Classification
2.8 … 500
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.
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
Technical data
Electric
Voltage type
Direct voltage
Available voltages
V 24, 110
Voltage tolerance (nominal voltage)
% ± 10
Admissible residual ripple
% <5
Duty cycle/operating mode according to VDE 0580
Switching time according to ISO 6403
ON
OFF
Maximum switching frequency
S1 (continuous operation)
ms 30 … 55
ms 10 … 15
1/h 15000
Nominal power at ambient temperature 20 °C
W
Maximum power at 1.1 x nominal voltage and ambient
temperature 20 °C
W 20.6
Protection class according to NEMA 250
2)If
17
NEMA TYPE 4 2)
the electrical connection is correctly installed
Information on explosion protection
Area of application according to NEC 505
Maximum surface temperature
Temperature class
3)
Type of protection of the valve solenoid according to
ANSI / ISA 60079-7
ANSI / ISA 60079-18
FM certificate
Ambient temperature range
Special conditions for safe use
3)
Surface temperature > 50 °C, provide contact protection
Class I, Zone 1
°C 135
T4
AEx e mb IIC T4 Gb
3044741
°C -20 … +60
The maximum temperature of the valve casing surface
is 125 °C. This must be considered when selecting the
connection cable or to prevent the connection cable from
coming into contact with the casing surface.
7/14
8/14
Bosch Rexroth AG
WE …VE1…
Hydraulics
RE 23178-VE1-B1
Electrical connection
The type-tested valve solenoid of the valve is equipped with
a terminal box and a type-tested cable gland.
The connection is polarity-independent.
1
2
4
Note
When establishing the electrical
connection, the protective
earthing conductor (PE ) has
to be connected correctly.
3
Properties of the connection terminals and mounting elements
Item
Function
Connectable line cross-section
1
Operating voltage connection
Single-wire 0.75 … 2.5 mm2
finely stranded 0.75 ... 1.5 mm2
2
Connection for protective earthing conductor
Single-wire 2.5 mm2 max.
finely stranded 1.5 mm2 max.
3
Connection for potential equalization conductor
Single-wire 6 mm2 max.
finely stranded 4 mm2 max.
4
Adapter with internal thread NPT1/2“
Connection line
Line type
Temperature range
non-armored cables and lines (outer sheath sealing)
°C -20 … > +100
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
9/14
Electrical connection
Circuit diagram
Direct voltage, polarity-independent
Overcurrent fuse and switch-off voltage peaks
Note:
Corresponding to the rated current, a fuse according to
IEC 60127 and/or UL 248-14 has to be connected upstream
of every solenoid coil (max. 3 x Inom). The shut-off threshold
of the fuse has to match the prospective short-circuit current
of the supply source. The prospective short-circuit current of
the supply source may amount to a maximum of 1500 A.
When inductivities are switched off, voltage peaks result
which may cause faults in the connected control electronics.
For this reason, the valve solenoids contain an interference
protection circuit which dampens this voltage peak to the
voltage value shown in the table.
This fuse may only be installed outside the explosive area or
must be of an explosion-proof design.
Prescribed external miniature fuses according to IEC 60127
Voltage data in
the valve type
code
Nominal
voltage of valve
solenoid
Rated current
valve solenoid
Rated current
(fuse)
Rated voltage
(fuse)
Maximum
voltage value
upon switch-off
Interference
protection
circuit
G24
24 V DC
0.708 A DC
800 mA
250 V
-90 V
G110
110 V DC
0.155 A DC
200 mA
250 V
-390 V
Suppressor diode
bi-directional
Note: Time current characteristic of the external miniature fuse: Quick-acting (F) according to IEC 60127
Prescribed external miniature fuses according to UL 248-14
Voltage data in
the valve type
code
Nominal
voltage of valve
solenoid
Rated current
valve solenoid
Rated current
(fuse)
Rated voltage
(fuse)
Maximum
voltage value
upon switch-off
Interference
protection
circuit
G24
24 V DC
0.708 A DC
1A
250 V
-90 V
G110
110 V DC
0.155 A DC
200 mA
250 V
-390 V
Suppressor diode
bi-directional
Note: Time current characteristic of the external miniature fuse: Quick-acting (F) according to UL 248-14
10/14
Bosch Rexroth AG
WE …VE1…
Hydraulics
RE 23178-VE1-B1
Performance limits (measured using HLP46, ϑoil = 40 °C ± 5 °C)
Note:
The stated switching power limits apply to operation with two
directions of flow (e.g. from P → A and simultaneous return
flow from B → T).
direction of flow (e.g. from P → A while port B is blocked.)
(In such cases, please consult us.)
The switching power limits were determined while the solenoids were at operating temperature, at 10% undervoltage and without tank pre-loading.
Due to the flow forces acting within the valves, the permissible
switching power limits may be considerably lower with only one
Valves with “G24” DC solenoids
Operating pressure in bar →
Characteristic
curve
Flow in l/min →
A, B
2
J, L, U
3
V
4
D, C, Y
5
Q, W
6
E
7
A/O, A/OF
8
F, P
1
Symbol
9
T
10
G
11
H, D/O
12
R 1) , M
Characteristic
curve
Symbol
1
A, B
2
J, L, U, Q, W
3
V
4
D, C, Y
5
C46/OF, D46/OF
6
E
7
A/O
8
F, P, T
9
R 1)
10
G
11
H
12
M, D/O, C/O
Valves with “G110” DC solenoids
Operating pressure in bar →
Flow in l/min →
1)Return
flow from actuator to tank
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
11/14
Characteristic curves (measured with HLP46, ϑoil = 40 °C ± 5 °C)
Pressure differential in bar →
∆p-qV characteristic curves
Flow in l/min →
4
Symbol “H” in central position P – T
9
Symbols “G” and “T” in central
position P – T
10
Symbol “R” in spool position B – A
Symbol
A, B
C, C46
D, D46, Y
E
F
T
H
J, Q
L
M
P
R
V
W
U
G
Direction of flow
P–A P–B A–T B–T
5
5
–
–
3
3
5
3
6
6
5
5
5
5
3
3
3
5
3
3
8
8
4
4
2
1
2
2
3
3
2
3
5
5
1
4
2
1
5
5
5
3
3
3
6
6
1
–
3
2
3
3
3
3
2
2
5
5
4
1
7
7
4
4
12/14
Bosch Rexroth AG
WE …VE1…
Hydraulics
RE 23178-VE1-B1
Dimensions (dimensions in mm)
Ø9,4
74
101
Ø5,3
„b“
23
42
„a“
65
23
80
6
147
105
4
3
5
2
1
80
3
4
6
7
3
69,2
13,6
F1
T
45
A
P
G
B
F3
3
F4
F2
0,01/100
Rzmax 4
Required surface quality of
the valve contact surface
1
2
3
4
Name plate
Identical seal rings for ports A, B, P, T
Plug screw for valves with one solenoid
Mounting nut with hexagon SW32
tightening torque MA = 4+1 Nm
5 Porting pattern according to ISO 4401-03-02-0-05
(with locating hole for locating pin ISO 8752-3x8-St,
material no. R900005694, separate order)
6 Space required to remove the coil
Valve mounting screws (separate order)
For reasons of stability, exclusively the following valve
mounting screws are to be used:
4 hexagon socket head cap screws
ISO 4762-M5x50-10.9-flZn-240h-L
(friction coefficient 0.09 - 0.14 according to VDA 235-101)
Material no. R913000064
Subplates (dimensions according to data sheet 45052
separate order)
(Without locating hole)
G 341/01 FE/ZN (G1/4)
G 342/01 FE/ZN (G3/8)
G 502/01 FE/ZN (G1/2)
(With locating hole)
G 341/60 FE/ZN (G1/4)
G 342/60 FE/ZN (G3/8)
G 502/60 FE/ZN (G1/2)
Note:
Subplates are not components in the sense of directive 94/9/EC
and can be used after the manufacturer of the overall system
has assessed the risk of ignition.
The G...FE/ZN versions are free from aluminum and/or
magnesium and galvanized.
RE 23178-VE1-B1
WE …VE1…
Hydraulics
Bosch Rexroth AG
Installation conditions (dimensions in mm)
Subplate dimensions
Individual assembly
Bank assembly
Minimum dimensions
Minimum cross-section
Length ≥ 64, width ≥ 58, height ≥ 25
Thermal conductivity of the subplate
Minimum distance between the
longitudinal valve axes
Height ≥ 60, width ≥ 85
≥ 38 W/mK (EN-GJS-500-7)
≥ 55 mm
Schematic diagram
Individual assembly
Bank assembly
13/14
14/14
Bosch Rexroth AG
Hydraulics
WE …VE1…
RE 23178-VE1-B1
Notes
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
[email protected]
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 our consent.
The data specified only serve to describe the product. No
statements 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 judgment
and verification. It must be remembered that our products are
subject to a natural process of wear and aging.
RE 23178-VE1-B1
WE …VE1…
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
[email protected]
www.boschrexroth.de
Hydraulics
Bosch Rexroth AG
15/14
© 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 our consent.
The data specified only serve to describe the product. No statements 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 judgment and
verification. It must be remembered that our products are subject to
a natural process of wear and aging.
16/14
Bosch Rexroth AG
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
[email protected]
www.boschrexroth.de
Hydraulics
WE …VE1…
RE 23178-VE1-B1
© 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 our consent.
The data specified only serve to describe the product. No
statements 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 judgment
and verification. It must be remembered that our products are
subject to a natural process of wear and aging.
1/20
Directional spool valves, direct
operated, with solenoid actuation
RE 23178-VE1-B2/03.15
Type WE...VE1...
Size 6
Component series 6X
Maximum operating pressure 350 bar
Maximum flow 70 l/min
Actual product may differ
For explosive areas
Operating instructions
Part II Product-specific instructions
What you need to know about these operating instructions
These operating instructions apply to the explosion-proof version of Rexroth valves and consist of the following two parts:
Part I
Data sheet 23178-VE1-B1
Part II
Product-specific instructions 23178-VE1-B2
Operating instructions 23178-VE1-B0
For further information on the correct handling of Rexroth hydraulic products, refer to Data sheet 07800 “General product
information on hydraulic products”.
2/20
Bosch Rexroth AG  |  Hydraulics
WE...VE1...  |  RE 23178-VE1-B2
ContentsPage
1
Scope of delivery
3
2
Important general information
3
2.1
3
Conventions in this product information
3Responsibilities
4
5
6
3
3.1
Liabilities and warranty
3
3.2
Responsibilities of the machine end-user/user
3
3.3Copyright
4
Important general safety instructions
4
4.1
4
Staff requirements, duty of care
4.2
Residual risks and protective measures
5
4.3
Intended use
6
4.4Disposal
6
4.5
6
Use in explosive areas
Amending general safety instructions
8
5.1
Information on the name plate and the valve solenoid
8
5.2
Special residual risks and protective measures
10
Assembly and (initial) commissioning
12
6.1
Safety instructions for assembly and (initial) commissioning
12
6.2
Rotating the solenoid coil by ± 90°
12
6.3Assembly
12
6.4
Establishing the electrical connection
13
6.5
Initial commissioning, re-commissioning
14
7Disassembly
14
8Operation
15
8.1
Operating the optional manual override
15
9Troubleshooting
16
10
Inspection and maintenance
16
11
Repair and spare parts
17
11.1 Safety instructions regarding repairs
17
11.2 Rectifying external leakages
17
11.3 Available spare parts
17
11.4 Contacts for repairs and spare parts:
17
12Accessories
18
12.1 Available accessories
18
12.2 Ordering address for accessories and valves
18
RE 23178-VE1-B2  |  WE...VE1...
1
Hydraulics  |  Bosch Rexroth AG
3/20
Scope of delivery
For the scope of delivery of the valve, please refer to the “Data sheet” of this valve
(Part I of these operating instructions).
2
Important general information
2.1 Conventions in this product information
Cross-references are shown in italics.
DANGER
This symbol indicates an imminent danger which will
immediately result in most serious bodily injuries or
death unless it is avoided.
WARNING
This symbol indicates an imminent danger which can
result in most serious bodily injuries or death unless it
is avoided.
CAUTION
This symbol indicates a possible danger which can
result in minor or serious bodily injuries and/or damage
to property.
3.2 Responsibilities of the machine
end-user/user
The hydraulic fluid on mineral oil basis is water-polluting and
inflammable.
It may only be used if the corresponding safety data sheet
of the manufacturer is available and all measures prescribed
therein have been realized.
If leakage at the valve can lead to water or soil
contamination, the valve must be put into a suitable
collecting pan.
The machine end-user is responsible for:
➢➢ the valve only being used according to the intended use
as defined in these operating instructions.
➢➢ that the valve is only used in such a way that the
technical data, operating and environmental conditions
stated in these operating instructions are complied with.
In particular the limit values stated in the data sheet may
not be exceeded if humanly possible and in compliance
with the operating instructions.
➢➢ the applicable provisions and directives on explosion
protection being complied with.
NOTE
This symbol refers to additional information.
3
Responsibilities
3.1 Liabilities and warranty
Bosch Rexroth AG shall not be liable for any damages
resulting from nonobservance or incomplete observance of
these operating instructions.
In case of unauthorized changes the warranty becomes
invalid.
Bosch Rexroth shall only be liable if the delivery was faulty.
Bosch Rexroth shall not be liable if faults are caused by the
customer replacing parts with parts that are similar but not
the identical parts prescribed by the manufacturer.
For further details on the warranty and manufacturer's
warranty, please refer to our general terms of delivery or
your contract documents.
If the valve is a component of another product, e.g. of a
hydraulic system, the person responsible for this other
product (e.g. the designer / system constructor) shall make
sure
➢➢ that the valve is only used according to the intended use
as defined in these operating instructions.
➢➢ that the valve is only used in such a way that the
technical data, operating and environmental conditions
stated in these operating instructions are complied with.
In particular the limit values stated in the data sheet may
not be exceeded if humanly possible and in compliance
with the operating instructions.
➢➢ the applicable provisions and directives on explosion
protection being complied with.
4/20
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
3.3 Copyright
4.1.3 Maintenance staff requirements
Without the express prior written approval of Bosch
Rexroth AG, these operating instructions may not be
copied electronically or mechanically, distributed, changed,
transmitted, translated into another language or otherwise
translated, used or copied - neither wholly nor in part.
Maintenance measures may be required to keep the valve
functional. Maintenance measures include inspection,
maintenance and repair of hydraulic and electronic
components. These various tasks require certain minimum
qualifications of the staff.
4
Important general safety instructions
4.1 Staff requirements, duty of care
4.1.1 General requirements, qualifications
Persons to be instructed or trainees or persons under
supervision under the age of 18 may not carry out any work
on Rexroth valves.
This shall not apply to young persons with a minimum age
of 16 if
➢➢ work with Rexroth valves is required to reach the training
objective.
➢➢ the protection of the young person is guaranteed in the
form of supervision by an experienced expert.
➢➢ only equipment, tools and protective equipment are used
that prevent injuries.
For inspections of hydraulic components the staff has to
meet the following requirements:
➢➢ They have to be instructed in the task.
➢➢ Special hydraulic expert knowledge is not required.
For maintenance work on hydraulic components the staff
has to meet the following requirements:
➢➢ They have to be instructed in the respective task.
➢➢ They need special hydraulic expert knowledge to carry
out maintenance tasks.
For repair work on hydraulic components the staff has to
meet the following requirements:
➢➢ They must be hydraulics experts who have been
instructed in the task according to the above definition.
➢➢ They need to be able to understand the operation of the
entire hydraulic system, of subsystems and the way it
interacts with the machinery.
➢➢ They need to be able to read hydraulic circuit diagrams,
interpret sub-functions of individual symbols and
understand functional diagrams.
An expert is someone who, due to their technical training,
knowledge and experience, can assess the tasks assigned
to them, recognize possible dangers and take the required
measures to prevent any danger of accidents.
The following applies to works on the electric system:
4.1.2 Staff requirements regarding classification
into zones and device groups
According to paragraph 505 NEC, wiring must always
be supervised by a “Qualified Registered Professional
Engineer”.
According to paragraph 505 NEC, the classification into
zones and device groups must always be supervised by a
“Qualified Registered Professional Engineer”.
Works on the electronic equipment may only be carried
out according to the electrical regulations by an authorized
electrician or an instructed person who is supervised by an
authorized electrician.
➢➢ They need knowledge about the function and structure of
hydraulic elements.
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4.2 Residual risks and protective measures
DANGER
Danger zone
Connections and
pressure lines (pipe
and hose lines)
Residual risk
Precaution(s), safety instructions
Risk of injury or danger to life due to hydraulic
fluid ejection under high pressure during
maintenance work
Depressurize the hydraulics before starting
commissioning and unload existing pressure
accumulators, if applicable.
Immediately repair leakages.
Surfaces of
components and
pressure lines
Risk of burning due to high surface temperatures Allow hydraulic components to cool before
starting maintenance work.
Electric components
Electric shock
Wear protective clothing.
Loss of explosion protection
Work on electric components only when they
are de-energized.
De-energize electrical connections prior to
installation and disassembly.
Any work requiring the disassembly of product
components may only be carried out in the
scope specified in this part.
Failure due to excessive moisture as a result of
cleaning with a high-pressure washer
Protect the valve from the high-pressure water
jet.
Unprotected handling of hydraulic fluid is harmful to health.
Please observe the safety instructions of the manufacturer of the hydraulic fluid used and the respective safety data sheets.
CAUTION
Danger zone
Connections and
pressure lines
(pipe and hose lines)
Residual risk
Precaution(s), safety instructions
Water or soil contamination due to leakage
Collecting pan.
NOTE
See also 3.2 Responsibilities of the machine end-user/user.
Immediately repair leakages.
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WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
4.3 Intended use
4.4 Disposal
The valve is designed and constructed for the control of
energy and signals using oil flow.
• Empty hydraulic products and dispose of them as metal
Store the valve only in a dry and dust-free environment
which is free from corrosives and fumes and which is subject
to a low degree of humidity and only minor temperature
changes. For storage exceeding 6 months, we recommend
filling in clean conservation oil.
• Collect any remaining hydraulic fluid and dispose of it
NOTE
The factory corrosion protection is sufficient if the valve is
stored under the stated conditions and if no condensate or
leakage water may enter the valve.
The valve may only be operated with the hydraulic fluids
stated in the data sheet. Please consult us for information
on the use of the valve with other hydraulic fluids.
waste.
according to the instructions in the safety data sheet of
the hydraulic fluid.
• Dispose of electronic products according to the valid
regulations.
4.5 Use in explosive areas
The valve is intended to be used in explosive gas
atmospheres.
• Group IIC for explosive gas atmospheres except mine
workings susceptible to firedamp.
The valve may only be operated in a technically perfect
condition and used as described in these operating
instructions. The connection conditions, application
conditions and performance data defined in these operating
instructions must not be changed.
• Encapsulation protection class “mb”
NOTE
• NEC 505 labeling: Class I, Zone 1, AEx e mb IIC T4 Gb
If you intend to use the valve with other connection,
application or performance data than those defined by
Bosch Rexroth AG in these operating instructions, please
contact Bosch Rexroth AG beforehand. The valve must not
be used with other connection, application and performance
data than those defined in these operating instructions
without the written approval by Bosch Rexroth AG.
The valve may only be modified in the scope specified in
this part.
Any safeguards fitted by Bosch Rexroth AG have to be
present, properly installed and fully functional, unless this
is not appropriate for setup or maintenance operation.
Their position must not be changed, they must not be
circumvented or made ineffective.
Persons under the influence of alcohol, other drugs or
pharmaceuticals that may affect their ability to react must
not operate or maintain Rexroth valves.
ANSI / ISA 60079-18
• Equipment protection by increased safety “e”
ANSI / ISA 60079-7
DANGER
The hydraulic product may only be used under the
application conditions stated in the data sheet,
information on the explosion protection or in areas
with lower requirements.
4.5.1 Classification of explosive areas
The user / machine end-user has to classify explosive areas
according to NEC (National Electrical Code) into zones
(class). The following table describes the zones, groups and
temperature classes of Class I (flammable gases, fumes or
vapors) in more detail. During use, also observe the other
information on the explosion protection in the data sheet.
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Gases, fumes or vapors
Classification class I
NEC 505-7
CEC 18-006
Zone 0
Areas, where dangerous concentrations of flammable gases, fumes or vapors are
continuously present or present for long periods under normal operating conditions.
Zone 1
Areas, where dangerous concentrations of flammable gases, fumes or vapors are
occasionally present under normal operating conditions.
Zone 2
Areas, where dangerous concentrations of flammable gases, fumes or vapors are rarely
present or present for short periods under normal operating conditions.
Class I Groups
NEC 505-7
CEC J18-050
Class I temperature classes
NEC 505-7
IIC (acetylene + hydrogen)
IIB (ethylene)
IIA (propane)
T1 ( ≤ 450 °C )
T2 ( ≤ 300 °C )
T3 ( ≤ 200 °C )
T4 ( ≤ 135 °C )
T5 ( ≤ 100 °C )
T6 ( ≤ 85 °C )
8/20
5
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
Amending general safety instructions
5.1 Information on the name plate and the valve solenoid
The meaning of the information on the name plate applicable to the non-electrical part of the valve can be seen from the
numbered fields of the following table.
1
2
13
12
15
3
4
6
14
16
17
9
7
8
19
18
11
10
5
no.
Type of information
Information or example
1
Manufacturer's logo
Rexroth
2
Material number of the valve (= order number)
e.g.: MNR: R901234567
3
Type designation complete valve
e.g.: 4WE6E6X/EG24VE1Z2
4
Serial number of the valve
e.g.: SN: 0002111
5
Manufacturer's factory number
e.g.: 7081
6
Date of manufacture (year and week)
e.g.: FD: 03W01
7
Maximum operating pressure
pmax = 350 bar
8
Ambient temperature range
–20 °C ≤ Ta ≤ +60 °C
9
Hydraulic symbol according to ISO 1219
Graphic
10
Designation of origin
Made in Germany
11
Name and address of the manufacturer
BOSCH REXROTH AG D-97816 LOHR
12
Customer's or production order number
e.g.: 1234567890
13
Customer material number or additional information
e.g.: CNR: 1234567890
14
---
---
15
---
---
16
---
---
17
---
---
18
---
---
19
---
---
RE 23178-VE1-B2  |  WE...VE1...
Hydraulics  |  Bosch Rexroth AG
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Please find the meaning of the information on the name plate of the valve solenoid mounted on the valve in the
correspondingly numbered fields of the following table.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
159
no.
Type of information
Information or example
1
Name / logo of the valve solenoid manufacturer
HYDAC ELECTRONIC GMBH
2
Address of the valve solenoid manufacturer
66128 Saarbrücken, Hauptstr. 27 Germany
3
Explosion protection mark
4
Internal identification number
e.g.: EX-1516-000 USA
5
Nominal voltage
e.g.: 24 VDC
6
Rated current
e.g.: 0.155 A
7
Customer material number
e.g.: R901346916
8
Mark for protection class according to NEC 505
Class I, Zone 1 AEx e mb IIC T4 Gb
9
FM certificate no.
3044741
10
Admissible ambient temperature range
-20 °C ≤ Ta ≤ +60 °C
11
Electrical characteristic values:
Duty cycle according to IEC 34-1 (VDE 0580) and frequency
e.g.: S1(DB)
12
Serial number of the valve solenoid and date of production
e.g.: 203
13
Protection class according to NEMA 250
Enclosure type 4
14
Application note
Cable ≥ +100 °C
15
Safety instruction
WARNING - do not open when energized
10/20
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
5.2 Special residual risks and protective measures
WARNING
Danger zone
Residual risk
Protective measure(s), safety instructions
Valve
Loss of explosion protection Observe the prescribed minimum distance in the case of battery
due to overheating
assembly of several valves.
Observe the prescribed minimum size and minimum heat conductivity
of the valve subplate.
Make sure that the heat dissipation of the valve is not impeded.
See “5.2.1 Requirements on the valve subplate”.
In the case of valves with two solenoids, a maximum of one of the
solenoids may be energized at a time.
The maximum temperature of the valve casing surface is 115 °C. This
must be considered when selecting the connection cable or to avoid
the connection cable coming into contact with the casing surface.
Valve solenoid
Risk of burning from hot
surfaces
Provide for a suitable touch guard.
Allow the valve solenoid to cool down to room temperature before
touching it directly with your hands during maintenance works. Put on
heat-protective gloves before touching it, if necessary.
5.2.1 Requirements on the valve subplate
WARNING
Explosion hazard!
If the following minimum values are not observed, there
is the risk of excessive heating of the valve solenoid
and loss of explosion protection.
➢➢ Thermal conductivity: at least 38 W/mK
➢➢ Minimum size L x W x H in case of individual assembly:
64 × 58 × 25 mm,
for recommended subplates, see “12.1 Available
accessories”
➢➢ Minimum cross-section W × H of the manifold in case of
bank assembly of several valves: 85 × 60 mm
➢➢ Minimum distance between the longitudinal valve axes in
the case of bank assembly of several valves: 55 mm
5.2.2 Changes at the surface protection of the
valve
WARNING
Explosion hazard!
The valve solenoid is equipped with a suitable surface
protection at the factory.
The valve solenoid must not be painted or otherwise
coated with non-conductive substances!
Any change at the surface protection of the valve
solenoid will lead to loss of the explosion protection!
5.2.3 Modifications
WARNING
Modifications exceeding the extent described in these
operating instructions are not permitted.
5.2.4 Notes on the valve use
Observe the following information during the project
planning:
WARNING
During operation, the surface temperature of the valve
solenoid exceeds 50 °C. Provide for suitable and
satisfactory contact protection.
Be aware of possible pressure intensification if the
valve is connected to the chamber on the piston
rod side of a differential cylinder. If the outflow of
the hydraulic fluid from this chamber is obstructed,
pressure on the cylinder may result in a pressure
intensification that may damage cylinder chamber,
supply line, and valve.
Make sure that there is adequate mechanical protection
against any high-pressure water jet that may be used
during cleaning work.
RE 23178-VE1-B2  |  WE...VE1...
The simultaneous operation of both solenoids leads to
malfunctions, excessive heating and will result in loss
of explosion protection.
The solenoid coil may only be commissioned if
mounted to the valve including pole tube and mounting
nut and if the protective earthing conductor and the
potential equalization conductor are connected.
Corresponding to the rated current, a fuse according
to IEC 60127 and/or UL 248-14 has to be connected
upstream of every solenoid coil (max. 3 x Inom).
The shut-off threshold of the fuse has to match the
prospective short-circuit current of the supply source.
The prospective short-circuit current of the supply
source may amount to a maximum of 1500 A.
This fuse may only be installed outside the explosive
area or must be of explosion-proof design.
The fuse can be accommodated in the related supply
unit or must be separately connected upstream.
For information on the recommended pre-fuse see
“Data sheet, overcurrent fuse and cut-off voltage peak”.
NOTE
To ensure proper functioning, care must be taken that the
pressure chamber of the valve solenoid is always filled with
hydraulic fluid.
Pressure peaks in the joint return line of more than one
valve may cause unintended control spool movements
and thus unintended switching processes. This applies
in particular when valves with detent are used. It is
recommended to use separate return lines.
If due to the operating conditions to be expected during
the switching processes, flows have to be anticipated that
exceed the valve's performance limits that can be seen from
the characteristic curve, a throttle insert must be used in
channel P to limit the flow.
The performance limit specified in the “data sheet” only
applies in the case of two flows in opposite directions
(e.g. flow from P to A and simultaneous return flow from
B to T). Due to the flow forces acting within the valves, the
performance limit may be considerably lower in applications
with only one flow.
Hydraulics  |  Bosch Rexroth AG
11/20
With valves with the switching symbol A and B (see data
sheet), port T must be used as the leakage oil connection
if the operating pressure exceeds the permissible tank
pressure.
Ports P, A and T with a 3/2 directional valve or ports P,
A, B and T with a 4/2 and 4/3 directional valve are clearly
assigned according to their function and must not be
arbitrarily exchanged or closed. The flow is only permitted in
the direction of the arrow specified in the “Data sheet”.
Due to the inductive effect, the switch-off of the valve
solenoid results in a voltage peak. The valve solenoid
already contains an interference protection circuit
dampening these voltage peaks. If necessary, you must,
however, provide for additional external circuits in order
to prevent the residual voltage peaks from affecting the
connected power circuits. The values for the residual voltage
peak depend on the valve solenoid used, see the
“Data sheet”.
5.2.5 Working safely at the valve
DANGER
Before carrying out any work at the valve, you must first
make sure that an explosive atmosphere cannot occur
during the period of the work.
12/20
6
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
Assembly and (initial)
commissioning
6.1 Safety instructions for assembly and
(initial) commissioning
DANGER
Before any work such as assembly or disassembly is
carried out at the valve, the hydraulic system must be
depressurized and the electrical control de-energized.
In order to avoid dangers from static charges,
the mounting or subplate on which the valve is
to be fitted must be electrically conductive and
included in the potential equalization according to
IEC 60079-14 and IEC 60364-4-41.
6.2 Rotating the solenoid coil by ± 90°
The solenoid coil can be mounted with an offset of ± 90° to
the pole tube, i.e. the longitudinal axis of the valve.
NOTE
The pole tube of the valve solenoid is completely sealed
towards the oil circuit. The solenoid coil can therefore still be
twisted if the valve has already been installed.
When turning the solenoid, make sure that it does not
project over the valve connection surface. Make sure
that the valve solenoid moves freely and does under no
circumstance rest on the base plate to avoid damages to
the valve.
WARNING
Explosion hazard!
Strictly observe the modification instructions as
improper assembly will result in loss of the explosion
protection.
1. Detach the mounting nut of the valve solenoid at the pole
tube (hexagon nut, wrench size 32).
2. Remove the solenoid coil and the O-ring from the valve
and rotate it by 90° in the desired direction.
3. Re-attach the solenoid coil in the desired position so
that the locating pin of the solenoid coil enters the
corresponding locating hole of the valve housing.
4. Mount the O-ring to the pole tube and push it to the
solenoid coil.
5. Re-tighten the mounting nut of the valve solenoid
(hexagon nut, wrench size 32).
Tightening torque: 4 + 1 Nm
6.3 Assembly
WARNING
Explosion hazard!
Check whether the explosion protection marks on the
name plate of the solenoids comply with the information
in these operating instructions.
Check
➢➢ based on the type designation on the name plate of
the valve,
➢➢ based on the information on the name plate of the
valve solenoid,
whether the valve type is correct.
Also check the scope of delivery for completeness and
possible transport damage. Also observe the safety
instructions in “5.2 Special residual risks and protective
measures” as well as “5.2.4 Notes on the valve use” and
“5.2.5 Working safely at the valve”.
Check whether the operating instructions for the valve
are complete. Contact us if the operating instructions are
incomplete.
Before any assembly and disassembly work starts, the
surroundings must be cleaned so that no dirt can get into the
oil circulation system. Only non-linting fabric or special paper
may be used for cleaning.
1. Check the valve contact surface for the required surface
quality (see “Data sheet, unit dimensions”). Remove
the protective plate from the valve and keep it safe for
returns in case any repairs become necessary later.
2. Check the seal rings at the valve connection surface and
possibly for completeness. Other sealants are inadmissible.
3. Put the valve on the valve contact surface.
WARNING
For reasons of stability only use the valve mounting
screws listed in “12.1 Available accessories”.
Always fasten the valve with all 4 valve mounting
screws as otherwise, leak-tightness is not
guaranteed.
4. When using the subplates mentioned in “12.1 Available
accessories” or in case of assembly on comparable cast
iron installation surfaces, tighten all four valve mounting
screws using a torque power screwdriver (tolerance
≤ 10%) and a tightening torque of 7 Nm (5.2 ft-lbs)
+/- 10%.
This tightening torque refers to the maximum admissible
operating pressure.
If the valve is to be used at a reduced maximum
pressure and in this connection is to be mounted on
mounting surfaces of a different material, it might be
necessary to use a lower tightening torque in order to
rule out any damage.
RE 23178-VE1-B2  |  WE...VE1...
DANGER
Check the structure of the valve using the circuit
diagrams, device lists and assembly plans.
Clarify possible differences with the responsible
persons.
5. Make sure that pipes and/or hoses are connected to all
ports and/or that the ports are closed with plug screws.
6. Carry out a special check to make sure that the cap nuts
and flanges are correctly tightened at the pipe fittings
and flanges.
NOTE
Mark all checked fittings, e.g. using a permanent marker.
7. Make sure that all pipes and hose lines and every
combination of connection pieces, couplings or
connection points with hoses or pipes are checked for
their operational safety by a person with appropriate
knowledge and experience.
6.4 Establishing the electrical connection
CAUTION
Connection lines for valve solenoids with a terminal box
may only be connected by or under the supervision of a
specialized electrician.
De-energize the connection line prior to assembly.
Use fine-wired conductors with pressed-on wire end
sleeves only.
Strip the wires of the connection lines and the
protective grounding conductor with 5 + 1 mm. Strip
the wires of the external equipotential bonding with
9 + 1 mm.
Use only lines satisfying the requirements on the
terminal areas of the connection terminals, see
“data sheet”.
The maximum temperature of the valve casing surface
is 125 °C. This must be considered when selecting the
connection cables or to prevent the connection cable
from coming into contact with the casing surface.
Connect the protective earthing conductor and the
earthing correctly.
Avoid sharp bends in connection lines and litz wires to
prevent short-circuits and interruptions.
When using a finely stranded conductor, equip it with
wire end ferrules. The lines that are used must be
suitable for ≤ -20 °C to ≥ +100 °C.
All types have to be equipped with an internal protective
grounding conductor terminal and an external
grounding terminal.
Hydraulics  |  Bosch Rexroth AG
13/20
At the factory, the valve is fitted with an adapter for
a cable entry and it guarantees type 4 according to
protection class NEMA 250.
The cable entry is provided by the customer and also
has to comply with type 4 according to protection class
NEMA 250.
Adapter connection data:
Internal connection thread
1/2" NPT
NOTE
When mounting the customer's cable entry, the adapter is
to be held in place with a suitable tool (hexagon wrench,
wrench size 27).
The connection is polarity-independent. In case of a valve
solenoid to be connected to AC voltage, a bridge rectifier is
integrated in the valve solenoid.
1. Open the terminal box (internal hexagon, wrench size 3).
2. Guide the cable through the adapter into the terminal
box.
3. Connect the wires of the connection line to the 2 pin
connection terminal and the internal protective grounding
conductor terminal.
4. Make a connection to the external equipotential bonding
line.
Tightening torques for the clamping screws:
Operating voltage connection
0.4...0.5 Nm
Connection for protective earthing
conductor
1.0...1.2 Nm
Connection for potential
equalization conductor
2.0...2.4 Nm
5. Assemble the cover with the seal beneath it. Tighten the
mounting screws (internal hexagon, wrench size 3) with
spring washers diagonally, one after the other.
Tightening torque of the cover screws: 1...1.1 Nm.
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WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
Assemble the cable guide on the opposite side of the
terminal box:
CAUTION
The adapter 1/2" NPT may only be modified when the
solenoid coil is disassembled.
1.Disassemble the solenoid coil, see “6.2 Turning the
solenoid coil by ± 90°”.
2.Open the terminal box (internal hexagon, wrench size 3).
3.Remove the blind plug (hexagon, wrench size 22).
6.5.2 Bleeding the hydraulic system
NOTE
Observe the operating instructions of the device and/or
system into which the valve is installed.
1. Switch the valve several times under operating pressure
before placing it into full operation. This will press out
any remaining air from the valve. Thus, mechanical
damage being caused by inadmissibly high acceleration
of the fluid and the control spool is avoided and the life
cycle of the valve is extended.
NOTE
4.Disassemble the adapter (hexagon, wrench size 27).
You can also achieve the switching movement of the
control spool necessary for the bleeding procedure by
manually actuating the manual override. For further
information, see “8.1 Operating the optional manual
override”.
5.Install the adapter on the opposite side, tightening torque
13...15 Nm.
6.Mount the blind plug, tightening torque 7...9 Nm.
7.Assemble the solenoid coil, see “6.2 Turning the
solenoid coil by 90 °C”.
6.5 Initial commissioning,
re-commissioning
6.5.1 Checking electrical connections / replacing
seals
Electrical connections must be checked for proper condition
by or under the guidance and supervision of a specialized
electrician before the initial or any recommissioning.
Seals are subject to a natural process of aging and for this
reason, check seals for damages every time the terminal
box is opened and replace them if required. This check has
to be carried out every 3 years from the date of manufacture
of the valve.
For order details for seal kits, please refer to “11.3 Available
spare parts”.
6.5.3 Performing a leak test
Check whether during operation, hydraulic fluid leaks at the
valve or at the connections.
7
Disassembly
DANGER
Before disassembly, ensure that the hydraulic system is
depressurized and that the electrical control system is
de-energized.
1. Loosen the electrical connections professionally.
2. Prepare a container for collecting the escaping hydraulic
fluid.
3. Only loosen the valve mounting screws using a suitable
tool.
4. Remove the valve mounting screws and loosen the valve
from the valve contact surface.
5. Collect the escaping hydraulic fluid in the provided
container and dispose of it properly.
6. If the valve is to be returned to the manufacturer for
repair, close the valve connection surface using the
protective plate supplied or protect it using equivalent
packaging in order to avoid contamination and damage.
7. Seal the subplate in order to avoid contamination.
RE 23178-VE1-B2  |  WE...VE1...
8
Operation
8.1 Operating the optional manual override
Valves of type WE...VE1... are equipped with a manual
override. Using this manual override, the switching function
of the valve can also be triggered if the valve solenoid is not
energized.
The manual override is only intended for manual operation.
The manual override is located on the side of the valve
solenoid facing away from the valve.
NOTE
With WE...VE1... directional valves, the manual override is
only sensible if the pressure in the tank channel of the valve
does not exceed 50 bar. Above this pressure value, the
actuating force that is to be applied is too large and there is
a risk of injury if the tool slips.
DANGER
Only operate the manual override if it is ensured that
this will not trigger any dangerous working movement
of the connected actuator!
CAUTION
Do not use sharp-edged tools to operate the manual
override!
There is the risk of damaging sealing surfaces at the
valve solenoid.
The manual override is only intended for short-time
manual actuation and must not be brought into a certain
spool position for a longer period or permanently by
means of mechanical devices.
The manual override is not suitable for frequently
recurring manual operations!
Hydraulics  |  Bosch Rexroth AG
15/20
16/20
9
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
Troubleshooting
The valve is not sensitive to faults as long as the specified
application conditions are complied with, in particular the oil
quality.
Error
Possible cause(s)
Valve does not
switch
Electrical connection interrupted, no
current continuity
• Cable break
Replace the connection cable
• Electrical defect in the solenoid coil
Remove valve and have it repaired
• No pressure at P
Check and/or reapply pressure at port P
• Control spool is jammed due to
If possible, try to release the control spool by
manually actuating the manual override.
See “8.1 Operating the optional manual override”.
If this is not successful: Remove valve and replace it
with a new one. Have the valve repaired.
contamination
External leakage
Remedy
Seal defective
• Seal on connection surface is
Remove the valve and replace the seals
• Other leakage
Remove valve and replace it with a new one.
defective
Following faults due to pollution, it is - in addition to the
repair - essential to check the oil quality and improve it,
if necessary, by suitable means such as flushing or the
additional installation of filters.
10 Inspection and maintenance
The following inspection, testing and maintenance works are
to be carried out regularly. The intervals for the same have
to be selected in a way - also depending on the operating
conditions - that deficiencies that have to be anticipated are
identified timely. The check must, however, be carried out at
least every three years from the date of manufacture of
the valve. The date of manufacture of the valve can be seen
on the name plate, see “5.1 Information on the name plate
and the valve solenoid”.
NOTE
The check is also to be carried out if the valve is only stored,
however not used!
For order details for seal kits, please refer to “11.3 Available
spare parts”.
1. De-energize the connection line.
2. Remove coarse dirt from the exterior.
CAUTION
In order to avoid electrostatic charging, only clean
the valve solenoid and the connection using a damp
cloth.
3. Check all external fittings for completeness and tight
seat.
4. Check that the adapter, blind plug, external grounding
connection, nut on pole tube and connection line are
firmly seated.
5. Check valve for external leakage, replace the seals if
necessary, see “11.2 Rectifying external leakages”.
6. Open the terminal box and replace damaged seals, if
necessary.
7. Check the inside of the terminal box for corrosion.
Corrosion is an indication of leakage. Remove the valve
and have it repaired if there is any visible corrosion.
8. Check the potting compound and internal lines and litz
wires of the valve solenoid for visible damage. Remove
the valve and have it repaired if there is any visible
damage.
9. Check all screws and connections for a tight seat.
10.Check all connection lines for damage. Replace the
connection line if there is any visible damage.
11.Replace the respective sealing elements every time the
adapter or the blind plug were removed. The sealing
elements are only intended for single use.
RE 23178-VE1-B2  |  WE...VE1...
12.Re-mount the cover of the terminal box with the seal
beneath it. Tighten the mounting screws with their spring
washers diagonally, one after the other. Tightening
torque of the cover screws: 1...1.1 Nm.
Hydraulics  |  Bosch Rexroth AG
17/20
11.3 Available spare parts
➢➢ NBR seal kit for the valve connection surface,
mat. no. R961000837
➢➢ FKM seal kit for the valve connection surface,
11 Repair and spare parts
11.1 Safety instructions regarding repairs
DANGER
In the interests of your safety, please observe all safety
instructions carefully and at any time.
➢➢ For repair works, the valve may only be
disassembled to the extent described in this
“Product-specific instruction”.
➢➢ Defective parts may only be replaced by new,
interchangeable, tested components in original
equipment quality.
➢➢ Clean the external environment of fittings and
devices before the disassembly. Do not use cotton
waste for the cleaning.
➢➢ Close all openings using protective caps.
11.2 Rectifying external leakages
External leakage on the valve connection surface can be
rectified on-site. Other leakages have to be rectified by
specialists of the manufacturer.
11.2.1 Rectifying leakage at the valve connection
surface
1. Remove the valve, see “7 Disassembly”.
2. Check the seal ring recesses on the valve connection
surface for cleanliness and damage.
3. Fit the new seals.
mat. no. R961000838
➢➢ Seal kit for the solenoid 45-Z2-VE1
mat. no. R961008474 containing:
1 × O-ring for adapter
1 x blind plug with O-ring
4 x hexagon socket head cap screws for the terminal box
4 x locking rings
4 x flat seals
NOTE
Ensure suitability of the sealing materials for the hydraulic
fluid used!
See “Data sheet”.
11.4 Contacts for repairs and spare parts:
Bosch Rexroth AG
Service Industriehydraulik
Bürgermeister-Dr. Nebel-Str. 8
97816 Lohr am Main
Germany
Phone +49 (9352) 18-1164
Fax
+49 (9352) 18-3363
www.boschrexroth.com/service
18/20
WE...VE1...  |  RE 23178-VE1-B2
Bosch Rexroth AG  |  Hydraulics
12 Accessories
12.2 Ordering address for accessories and
valves
12.1 Available accessories
Headquarters:
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr am Main
Germany
➢➢ Valve mounting screws:
For reasons of stability, exclusively the following valve
mounting screws are to be used:
4 hexagon socket head cap screws
ISO 4762 - M5 x 50 - 10.9 - flZn - 240h - L (friction
coefficient 0.09...0.14 according to VDA 235-101),
mat. no. R913000064
➢➢ Subplates with dimensions like in the “Data sheet 45052”
for valves with a porting pattern according to
DIN 24340-A6 without locating hole:
• G341/01 FE/ZN with G1/4 ports,
mat. no. R900510636
• G342/01 FE/ZN with G3/8 connections,
mat. no. R900511297
• G341/01 FE/ZN with G1/2 ports,
mat. no. R900510636
➢➢ Subplates with dimensions like in “data sheet 45052”
for valves with porting pattern according to
ISO 4401-03-02-0-05:
• G341/60 FE/ZN with G1/4 ports,
mat. no. R901043863
• G342/60 FE/ZN with G3/8 connections,
mat. no. R901043864
• G502/60 FE/ZN with G1/2 ports,
mat. no. R901043866
➢➢ Locating pin for porting pattern according
to ISO 4401-03-02-0-05:
• Locating pin 3 × 8 according to EN ISO 8752,
mat. no. R900005694
➢➢ Throttle inserts
• Throttle Ø 0.8 mm, mat. no. R900152065
• Throttle Ø 1.0 mm, mat. no. R900152066
• Throttle Ø 1.2 mm, mat. no. R900152067
Phone +49 (9352) 18-0
or the respectively competent sales organizations.
The addresses can be found on the Internet at:
www.boschrexroth.com
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Hydraulics  |  Bosch Rexroth AG
19/20
20/20
Bosch Rexroth AG  |  Hydraulics
Bosch Rexroth AG Hydraulics
Zum Eisengießer 1
97816 Lohr am Main, Germany
Phone +49 (0) 93 52 / 18-0
[email protected]
www.boschrexroth.de
WE...VE1...  |  RE 23178-VE1-B2
© 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 our
consent.
The data specified only serve to describe the product. No statements
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 judgment and verification. It must be
remembered that our products are subject to a natural process of wear
and aging.
Bosch Rexroth AG
Hydraulics
Zum Eisengießer 1
97816 Lohr, Germany
[email protected]
www.boschrexroth.com
Printed in Germany
RE 23178-VE1-B0/03.15
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