Bosch Rexroth H-4WEH...XE Series Bedienungsanleitung

Operating instructions

RE 24751-XE-B/04.16

Replaces: 09.13

English

4/2 and 4/3 directional valves,

internally pilot-operated,

externally pilot-operated

(Area of application according to the explosion protection directive 2014/34/EU: II 2G)

Type H-4WEH...XE...

The data speciﬁed serves to describe the

product. If there is also information on the

use, itis only to be regarded as application

examples and proposals. Catalog information

does not constitute warranted properties.

Theinformation given does not release the

user from the obligation of own judgment and

veriﬁcation. Our products are subject to a

natural process of wear and aging.

speciﬁcations and other information set

forth in it, are the exclusive property of

Bosch Rexroth AG. It may not be reproduced or

given to third parties without its consent.

The cover shows an example conﬁguration.

Theproduct supplied may therefore diﬀer from

the ﬁgure shown.

The original operating instructions were

prepared in German.

RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG

3/52Contents

Contents

1 About this documentation 5

1.1 Validity of the documentation 5

1.2 Required and amending documentation 5

1.3 Representation of information 5

2 Safety instructions 7

2.1 General information on this chapter 7

2.2 Intended use 7

2.3 Improper use 8

2.4 Qualiﬁcation of personnel 9

2.5 General safety instructions 10

2.6 Product-speciﬁc safety instructions 11

2.7 Notices on the valve use 13

2.8 Personal protective equipment 14

2.9 Obligations of the machine end-user 14

3 General information on damage to property and damage to product 15

4 Scope of delivery 16

5 Product information 16

5.1 Product identiﬁcation 17

6 Transport and storage 22

6.1 Transporting the valve 22

6.2 Storing the hydraulic valve 23

7 Assembly 24

7.1 Unpacking 24

7.2 Changes to the surface protection of the valve 24

7.3 Installation conditions 24

7.4 Before the assembly 25

7.5 Required tools 25

7.6 Required accessories 25

7.7 Assembling the valve 26

8 Commissioning 34

9 Operation 37

9.1 General information 37

9.2 Operating the manual override (only relevant for type H-4WEH./.NXE.) 38

10 Maintenance and repair 39

10.1 Cleaning and care 39

10.2 Inspection and maintenance 39

10.3 Maintenance schedule 41

10.4 Repair 41

10.5 Rectifying external leakages 41

10.6 Spare parts 42

11 Disassembly and removal 43

12 Disposal 44

12.1 Environmental protection 44

12.2 Return to Bosch Rexroth AG 44

12.3 Packaging 44

12.4 Materials used 45

4/52

Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16

12.5 Recycling 45

13 Extension and modiﬁcation 45

14 Troubleshooting 46

14.1 How to proceed for troubleshooting 46

15 Technical data 47

16 Appendix 48

16.1 List of addresses 48

17 Declaration of conformity 49

18 Alphabetical index 50

About this documentation 5/52

RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG

1 About this documentation

1.1 Validity of the documentation

This documentation applies to the following products:

•H-4WEH...XE...

This documentation is intended for assemblers, operators, service engineers, system

end-users, machine and system manufacturers.

This documentation contains important information on the safe and proper

assembly, transport, commissioning, operation, use, maintenance, disassembly and

simple troubleshooting of the product.

▶ Read this documentation thoroughly and in particular chapter2 "Safety

instructions" and chapter 3 "General information on damage to property and

damage to product" before working with the valve.

1.2 Required and amending documentation

▶ The product may not be commissioned until you have been provided with the

documentation marked with the book symbol and you have understood and

observed it.

Table 1: Required and amending documentation

Title Document number Document type

4/2 and 4/3 directional valves, internally

pilot-operated, externally pilot-operated

24751-XE Data sheet

General product information on

hydraulic products

07008 Data sheet

Subplates 45100 Data sheet

Declaration of conformity H-4WEH...XE... Document

Refer to operating

instructions

24751-XE-B

1.3 Representation of information

Uniform safety instructions, symbols, terms and abbreviations are used to ensure

quick and safe working with the product using this documentation. For a better

understanding, they are explained in the following sections.

1.3.1 Safety instructions

In this documentation, safety instructions are included in chapter2.6 "Product-

speciﬁc safety instructions" and in chapter3 "General information on damage

to property anddamage to product" and whenever a sequence of actions or

instructions is explained which bear the danger of personal injury or damage to

property. Thehazard avoidance measures described must be observed.

6/52 About this documentation

Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16

Safety instructions are structured as follows:

SIGNAL WORD

Type and source of danger!

Consequences in case of non-compliance

▶ Hazard avoidance measures

▶ <Enumeration>

•Warning sign: draws attention to the danger

•Signal word: identiﬁes the degree of danger

•Type and source of danger: speciﬁes the type and source of danger

•Consequences: describes the consequences in case of non-compliance

•Precaution: speciﬁes how the danger can be prevented

Table 2: Risk classes according to ANSI Z535.6-2006

Warning sign, signal word Meaning

DANGER Indicates a dangerous situation which will cause death or

severe injury if not avoided.

WARNING Indicates a dangerous situation which may cause death or

severe injury if not avoided.

CAUTION Indicates a dangerous situation which may cause minor or

moderate (personal) injury if not avoided.

NOTICE Damage to property: The product or the environment could

be damaged.

1.3.2 Symbols

The following symbols indicate notices which are not safety-relevant but increase the

comprehensibility of the documentation.

Table 3: Meaning of the symbols

Symbol Meaning

If this information is not observed, the product cannot be used and/or

operated optimally.

▶ Individual, independent action

Numbered instruction:

The numbers indicate that the actions must be carried out one after

theother.

1.3.3 Abbreviations

The following abbreviations are used in this documentation:

Table 4: Abbreviations

Abbreviation Meaning

ATEX EU Explosion Protection Directive (Atmosphère explosible)

EN European Standard

ISO International Organization for Standardization

Safety instructions 7/52

RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG

Abbreviation Meaning

IEC International Electrotechnical Commission

RE Rexroth document

IP Ingress protection rating

A, B Hydraulic connections (actuator)

T Hydraulic connection (tank)

P Hydraulic connection (pump)

X, Y Hydraulic connection (pilot oil)

ANSI American National Standards Institute

2 Safety instructions

2.1 General information on this chapter

The product has been manufactured according to the generally accepted codes of

practice. However, there is still the danger of personal injury and damage to property

if you do not observe this chapter and the safety instructions in this documentation.

▶ Read this documentation completely and thoroughly before working with

theproduct.

▶ Keep this documentation in a location where it is accessible to all users at

alltimes.

▶ Always include the required documentation when you pass the product on to

third parties.

2.2 Intended use

The product is a hydraulic component.

You may use the product as follows:

•as a pilot-operated valve with solenoid actuation for intended use in explosive

atmospheres.

The product is only intended for professional use and not for private use.

Intended use includes having read and understood this documentation completely,

especially chapter 2 "Safety instructions".

The valve is designed and constructed for the control of oil ﬂows. It complies with

the requirements of the EU explosion protection directive 2014/34/EU. According

to directive 2014/34/EU, the device group, category and temperature class to which

the valve corresponds are indicated in the "Area of application" section of the

datasheet.

8/52 Safety instructions

Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16

For information on the device group, category and temperature class according to

the explosion protection directive 2014/34/EU, please refer to "Data sheet 24751-XE"

under "Information on explosion protection" and to the name plate of the valve.

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.

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.

2.3 Improper use

Any use deviating from the intended use is improper and thus not admissible.

The installation or use of inappropriate products in safety-relevant applications

could result in unintended operating states during use which in turn could cause

personal injuries and/or damage to property. Therefore, please only use a product

for safety-relevant applications if this use is expressly speciﬁed and permitted in

the documentation of the product. For example, in explosion-protected areas or in

safety-related control components (functional safety).

Improper use of the product includes:

•Faulty assembly

•Incorrect transport

•Lack of cleanliness during storage and assembly

•Faulty installation

•Use of inappropriate/non-admissible hydraulic ﬂuids

•Non-compliance with the speciﬁed performance limits

Changes and/or modiﬁcation at the valve are not admissible, see chapter 13

"Extension and modiﬁcation".

Bosch Rexroth AG does not assume any liability for damage caused by improper use.

The user assumes all risks involved with improper use.

Safety instructions 9/52

RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG

2.4 Qualiﬁcation of personnel

The activities described in this documentation require basic knowledge of

mechanics, electrics, hydraulics, pneumatics as well as knowledge of the appropriate

technical terms. For transporting and handling the product, additional knowledge

of how to handle lifting gear and the necessary attachment devices is required.

Inorder to ensure safe use, these activities may only be carried out by an expert in

therespective ﬁeld or an instructed person under the direction and supervision of

an expert.

Experts are those who are able to recognize potential dangers and apply the

appropriate safety measures due to their professional training, knowledge and

experience, as well as their understanding of the relevant conditions pertaining

to the work to be undertaken. An expert must observe the relevant speciﬁc

professional rules and have the necessary expert knowledge.

Expert knowledge means for example for hydraulic products:

•reading and completely understanding hydraulic schemes,

•in particular, completely understanding the correlations regarding the safety

equipment and

•having knowledge of the function and set-up of hydraulic components.

The personnel must have the following additional qualiﬁcations to the extent

required to fulﬁll their tasks:

•Understanding of the general principles of explosion protection, protection classes

and device labelling

•Understanding of those aspects of device design which inﬂuence the protection

concept

•Understanding of the contents of certiﬁcates and of the relevant parts of this

standard

•General understanding of the testing, maintenance and repair requirements of

IEC60079-17

•Familiarity with the special methods which are to be applied during the selection

and installation of devices to which this standard refers

•Understanding of the additional importance of work permit systems and safe

electrical separation regarding explosion protection

Bosch Rexroth oﬀers measures supporting training in speciﬁc ﬁelds. You can ﬁnd

an overview of the training contents on the Internet at:

http://www.boschrexroth.de/didactic

Qualiﬁcation of personnel

for the installation and

commissioning of valves in

explosive areas

10/52 Safety instructions

Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16

2.5 General safety instructions

•Observe the valid regulations on accident prevention and environmental protection.

•Observe the safety regulations and provisions of the country in which the product

is used/applied.

•Exclusively use Rexroth products in technically perfect condition.

•Observe all notices on the product.

•Persons assembling, operating, disassembling or maintaining Rexroth products

must not be under the inﬂuence of alcohol, other drugs or medication inﬂuencing

the ability to react.

•Only use original Rexroth accessories and spare parts in order to exclude any

hazard to persons due to unsuitable spare parts.

•Comply with the technical data and environmental conditions speciﬁed in the

product documentation.

•The installation or use of inappropriate products in safety-relevant applications

could result in unintended operating states during use which in turn could cause

personal injuries and/or damage to property. Therefore, only use a product for

safety-relevant applications if this use is expressly speciﬁed and permitted in the

documentation of the product, e.g. in explosion protection zones or in safety-

related parts of control systems (functional safety).

•Do not commission the product until you can be sure that the end product (for

example a machine or system) where the Rexroth product is installed complies

with the country-speciﬁc provisions, safety regulations and standards of the

application.

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