This document stipulates the safety requirements for use of legs and rams as intended by the manufacturer or the manufacturer's authorized representative. These include legs, support rams and rams, including the mechanical extensions, the inner valves and safety devices, seals, the hydraulic connections, (up to the 1st hose line or to the valve of design B, see Part 3) and their lifting points but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.
NOTE   Some components are discussed in other parts of this standard series.
This document applies for legs, support rams, and cylinders that are used at ambient temperatures between –10 °C and 60 °C.
This document identifies and takes account of:
-   possible hazards which may be caused by the operation of legs, support rams and rams;
-   the hazardous areas and the operating conditions that can cause any type of hazard;
-   the situations that can result in hazards that cause an injury or impair health;
-   dangers that can be caused through mine gas and/or flammable dusts.
This document describes methods for reducing these hazards.
Clause 4 contains a list of the hazards discussed.
This document does not specify any additional requirements for:
-   specially corrosive environments;
-   risks associated with manufacturing, transport, and decommissioning;
-   earthquake.
This standard is applicable to all legs, support rams and rams placed on the market for the first time and which are manufactured after the date on which this standard was published.

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This document specifies the safety requirements for hydraulic and electro hydraulic control devices, including hydraulic valves and their control elements, valve combinations, control systems, pipes and hose assemblies, fittings, shut-off devices, measuring devices, filters, built-in pressure limiting and check valves in legs and rams and water spraying and dust suppression valves, as well emergency stop, start warning, locking- and control unit when used as specified by the manufacturer or his authorized representative. Excluded are pressure generators, and internal valves of legs and rams (e.g. leg bottom valves, see EN 1804-2).
NOTE   Some components are dealt with in other parts of this standard.
This document applies to hydraulic and electro hydraulic control devices at ambient temperatures from -10 °C to 60 °C.
This document identifies and takes into account:
-   possible hazards which may be caused by the operation of hydraulic and electro hydraulic control devices;
-   areas and operating conditions which may create such hazards;
-   hazardous situations which may cause injury or may be damaging to health;
-   hazards which may be caused by firedamp and/or combustible dusts.
This document describes methods for the reduction of these hazards.
A list of significant hazards covered appears in Clause 4.
This document does not specify any additional requirements for:
-   use in particularly corrosive environments;
-   hazards occurring during construction, transportation, decommissioning;
-   earthquakes.
This document is applicable to all hydraulic and electro hydraulic control unit placed on the market for the first time and which are manufactured after the date on which this standard was published.

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This document stipulates the safety requirements for the use of support units intended by the manufacturer or the manufacturer's authorized representative. Examples of support units are: frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and anchoring devices which provide support functions. This document excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment.
COMMENT      Some components are discussed in other parts of this series of standards.
This document applies for support units that are used at ambient temperatures between -10 °C and 60 °C.
This document also applies to support components and support accessories which are provided if the support unit is fitted with stowing equipment. This document identifies and takes account of:
-   the hazards that can possibly be induced through operation of the support units;
-   the hazardous areas and the operating conditions that can cause any type of hazard;
-   the situations that can result in hazards that cause an injury or impair health;
-   dangers that can be caused through mine gas and/or flammable dusts.
This document describes methods for reducing these hazards.
Clause 4 contains a list of the hazards discussed.
This document does not specify any additional requirements for:
-   a particularly corrosive environment;
-   risks associated with manufacturing, transport and decommissioning;
-   earthquake.
This document applies for all support units that have been placed on the market for the first time after the issue date of this standard.

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This document stipulates the safety requirements for the use of support units intended by the manufacturer. Examples of support units are: frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and anchoring devices which provide support functions. This document excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment.
NOTE   Some components are discussed in other parts of this series of standards.
This document applies for support units that are used at ambient temperatures between −10 °C and 60 °C.
This document also applies to support components and support accessories which are provided if the support unit is fitted with stowing equipment. This document identifies and takes account of:
-   the hazards that can possibly be induced through operation of the support units;
-   the hazardous areas and the operating conditions that can cause any type of hazard;
-   the situations that can result in hazards that cause an injury or impair health;
-   dangers that can be caused through mine gas and/or flammable dusts.
This document describes methods for reducing these hazards.
Clause 4 contains a list of the hazards discussed.
This document does not specify any additional requirements for:
-   a particularly corrosive environment;
-   risks associated with manufacturing, transport and decommissioning;
-   earthquake.
A complete hydraulic powered roof support consists of the support units (EN 1804-1:2020), legs and support rams (EN 1804-2:2020) and the hydraulic and electro hydraulic controls (EN 1804-3:2020). Each part of this multipart document addresses the safety requirements of the components mentioned in the scopes of the respective parts of this multipart series.
This document is not applicable to all support units manufactured before the date of its publication.

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This document stipulates the safety requirements for use of legs and rams as intended by the manufacturer. These include legs, support rams and rams, including the mechanical extensions, the inner valves and safety devices, seals, the hydraulic connections (up to the 1st hose line or to the valve of design B, see EN 1804-3:2020) and their lifting points, but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.
NOTE   Some components are discussed in other parts of this standard series.
This document applies for legs, support rams, and cylinders that are used at ambient temperatures between -10 °C and 60 °C.
This document identifies and takes account of:
-   possible hazards which may be caused by the operation of legs, support rams and rams;
-   the hazardous areas and the operating conditions that can cause any type of hazard;
-   the situations that can result in hazards that cause an injury or impair health;
-   dangers that can be caused through mine gas and/or flammable dusts.
This document describes methods for reducing these hazards.
Clause 4 contains a list of the hazards discussed.
This document does not specify any additional requirements for:
-   specially corrosive environments;
-   risks associated with manufacturing and decommissioning;
-   earthquake.
A complete hydraulic powered roof support consists of the support units (EN 1804-1:2020), legs and support rams (EN 1804-2:2020) and the hydraulic and electro hydraulic controls (EN 1804-3:2020). Each part of this multipart document addresses the safety requirements of the components mentioned in the scopes of the respective parts of this multipart series.
This document is not applicable to legs and rams manufactured before the date of its publication.

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This document specifies the safety requirements for hydraulic and electro hydraulic control devices, including hydraulic valves and their control elements, valve combinations, control systems, pipes and hose assemblies, measuring devices, built-in pressure limiting and check valves in legs and rams and, as well emergency stop, start warning, blocking- and control unit when used as specified by the manufacturer or his authorized representative. Excluded are pressure generators, and internal valves of legs and rams (e.g. leg bottom valves, see EN 1804-2:2020).
NOTE   Some components are dealt with in other parts of this standard.
This document applies to hydraulic and electro hydraulic control devices at ambient temperatures from -10 °C to 60 °C.
This document identifies and takes into account:
-   possible hazards which can be caused by the operation of hydraulic and electro hydraulic control devices;
-   areas and operating conditions which can create such hazards;
-   hazardous situations which can cause injury or can be damaging to health;
-   hazards which can be caused by firedamp and/or combustible dusts.
This document describes methods for the reduction of these hazards.
A list of significant hazards covered appears in Clause 4.
This document does not specify any additional requirements for:
-   use in particularly corrosive environments;
-   hazards occurring during construction, transportation, decommissioning;
-   earthquakes.
A complete hydraulic powered roof support consists of the support units (EN 1804-1:2020), legs and support rams (EN 1804-2:2020) and the hydraulic and electro hydraulic controls (EN 1804-3:2020). Each part of this multipart document addresses the safety requirements of the components mentioned in the scopes of the respective parts of this multipart series.
This document is not applicable to hydraulic and electro hydraulic control systems manufactured before the date of its publication.

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5
This standard specifies the safety requirements for electro-hydraulic control devices for support units,
including their emergency stop, pre-start warning, monitoring and control devices, when used as specified by
the manufacturer or his authorized representative.
The requirements of EN 1804 Part 3 also apply to the hydraulic components of the electro-hydraulic control
systems
This standard applies to electro-hydraulic control systems used at ambient temperatures from ?10 °C to
40 °C and operating temperatures from ?10 °C to 60 °C.
This standard identifies and takes into account:
.possible hazards which can be caused by the operation of hydraulic control devices;
.areas and operating conditions which can create such hazards;
.hazardous situations which can cause injury or may be damaging to health;
.hazards which can be caused by firedamp and/or flammable dust.
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in Clause 4.
This standard is applicable to all electro-hydraulic control devices placed on the market for the first time
which are manufactured after the date on which this standard was issued..prEN 1804-4:2004 (E)
This European Standard does not specify any additional requirements for:
.cable less remote control systems;
.specially corrosive environments;
.hazards occurring during construction, transportation, decommissioning;
.earthquakes.

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This standard specifies the safety requirements for legs and rams when used as specified by the manufacturer or his authorised representative. Examples covered by the standard include legs, support rams and rams with their mechanical extensions, internal valves and safety devices, seals, hydraulic connections (up to the first hose or Type B valve, see Part 3) and their lifting points but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems. This standard applies to legs, support rams and rams used at ambient temperatures from -10 °C to 60 °C. This standard identifies and takes account of: Possible hazards which may be caused by the operation of legs, support rams and rams; - Areas and operating conditions which may create such hazards; - Hazardous situations which may cause injury or may be damaging to health. This standard describes methods for the reduction of these hazards. A list of hazards covered appears in clause 4. This standard is applicable to all legs, support rams and rams placed on the market for the first time and which are manufactured after the date on which this standard was published. This European standard does not establish the additional requirements for: - Specially corrosive environments; - Hazards occurring during construction, transportation, decommissioning; - Earthquake.

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This standard specifies the safety requirements for support units when used as specified by the manufacturer or his authorised representative. Examples of support units are frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and anchoring devices which provide support functions. This part of the standard excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment. This standard applies to support units used at temperatures from -10° C to 60° C. This standard also applies to support components and support accessories which are provided if the support unit is fitted with stowing equipment. This standard identifies and takes account of: - Possible hazards which may be caused by the operation of support units; - Areas and operating conditions which may create such hazards; - Hazardous situations which may cause injury or may be damaging to health; This standard describes methods for the reduction of these hazards. A list of hazards covered appears in clause 4. This European standard does not establish the additional requirements for: - Specially corrosive environments; - Hazards occurring during construction, transportation, decommissioning; - Earthquake. This standard is applicable to all support units placed on the market for the first time, which are manufactured after the date on which this standard was published.

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This document specifies the safety requirements for hydraulic control devices, including hydraulic valves and their control elements, valve combinations, control systems, pipes and hose assemblies, fittings, shut-off devices, measuring devices, filters, built-in pressure limiting and check valves in legs and rams and water spraying and dust suppression valves when used as specified by the manufacturer or his authorized representative. Excluded are electronic control devices, pressure generators, and internal valves of legs and rams (e.g. constant yield valves. Some components are dealt with in other parts of this standard.

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This document specifies the safety requirements for hydraulic control devices, including hydraulic valves and
their control elements, valve combinations, control systems, pipes and hose assemblies, fittings, shut-off
devices, measuring devices, filters, built-in pressure limiting and check valves in legs and rams and water
spraying and dust suppression valves when used as specified by the manufacturer or his authorized
representative. Excluded are electronic control devices, pressure generators, and internal valves of legs and
rams (e.g. constant yield valves, see EN1804-2).
Some components are dealt with in other parts of this standard.
NOTE prEN1804-4 also applies to electro-hydraulic control devices. Part 4 also contains requirements for electrical
control elements of valves.
This document applies to hydraulic control devices at ambient temperatures from –10 °C to 60 °C.
This document identifies and takes into account:
- possible hazards which may be caused by the operation of hydraulic control devices;
- areas and operating conditions which may create such hazards;
- hazardous situations which may cause injury or may be damaging to health;
- hazards which may be caused by firedamp and/or combustible dusts.
This document describes methods for the reduction of these hazards.
A list of significant hazards covered appears in clause 4.
This document is applicable to all hydraulic control devices placed on the market for the first time after the
date of issue of this standard.
This document does not specify any additional requirements for:
- use in particularly corrosive environments;
- hazards occurring during construction, transportation, decommissioning;
- earthquakes.

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This standard specifies the safety requirements for legs and rams when used as specified by the manufacturer or his authorised representative. Examples covered by the standard include legs, support rams and rams with their mechanical extensions, internal valves and safety devices, seals, hydraulic connections (up to the first hose or Type B valve, see Part 3) and their lifting points but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.
NOTE Some components are dealt with in other parts of this standard.
This standard applies to legs, support rams and rams used at ambient  temperatures from -10 °C to 60 °C.
This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of legs, support rams and rams;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health.
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This standard is applicable to all legs, support rams and rams placed on the market for the first time and which are manufactured after the date on which this standard was published.
This European standard does not establish the additional requirements for:
-    Specially corrosive environments;
-    Hazards occurring during construction, transportation, decommissioning;
-    Earthquake.

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This standard specifies the safety requirements for support units when used as specified by the manufacturer or his authorised representative. Examples of support units are frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and ancho-ring devices which provide support functions. This part of the standard excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment.
NOTE Some components are dealt with in other parts of this standard.
This standard  applies to support units used at temperatures from -10° C to 60° C.
This standard also applies to support components and support accesso-ries which are provided if the support unit is fitted with stowing equip-ment. This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of support units;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health;
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This European standard does not establish the additional requirements for:
-   Specially corrosive environments;
-   Hazards occurring during construction, transportation, decommissioning;
-   Earthquake.
This standard is applicable to all support units placed on the market for the first time, which are manufactured after the date on which this standard was published.

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This standard specifies the safety requirements for support units when used as specified by the manufacturer or his authorised representative. Examples of support units are frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and anchoring devices which provide support functions. This part of the standard excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment.
NOTE   Some components are dealt with in other parts of this standard.
This standard applies to support units used at temperatures from -10° C to 60° C.
This standard also applies to support components and support accessories which are provided if the support unit is fitted with stowing equipment. This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of support units;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health;
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This European standard does not establish the additional requirements for:
-   Specially corrosive environments;
-   Hazards occurring during construction, transportation, decommissioning;
-   Earthquake.
This standard is applicable to all support units placed on the market for the first time, which are manufactured after the date on which this standard was published.

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This document specifies the safety requirements for hydraulic control devices, including hydraulic valves and their control elements, valve combi¬nations, control systems, pipes and hose assemblies, fittings, shut-off devices, measuring devices, filters, built-in pressure limiting and check valves in legs and rams and water spraying and dust suppression valves when used as specified by the manufacturer or his authorized representative. Excluded are electronic control devices, pressure generators, and internal valves of legs and rams (e.g. constant yield valves, see EN1804-2).
Some components are dealt with in other parts of this standard.
NOTE   prEN1804-4 also applies to electro-hydraulic control devices. Part 4 also contains requirements for electrical control elements of valves.
This document applies to hydraulic control devices at ambient temperatures from –10 °C to 60 °C.
This document identifies and takes into account:
-   possible hazards which may be caused by the operation of hydraulic control devices;
-   areas and operating conditions which may create such hazards;
-   hazardous situations which may cause injury or may be damaging to health;
-   hazards which may be caused by firedamp and/or combustible dusts.
This document describes methods for the reduction of these hazards.
A list of significant hazards covered appears in clause 4.
This document is applicable to all hydraulic control devices placed on the market for the first time after the date of issue of this standard.
This document does not specify any additional requirements for:
-   use in particularly corrosive environments;
-   hazards occurring during construction, transportation, decommissioning;
-   earthquakes.

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This standard specifies the safety requirements for legs and rams when used as specified by the manufacturer or his authorised representative. Examples covered by the standard include legs, support rams and rams with their mechanical extensions, internal valves and safety devices, seals, hydraulic connections (up to the first hose or Type B valve, see Part 3) and their lifting points but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.
NOTE   Some components are dealt with in other parts of this standard.
This standard applies to legs, support rams and rams used at ambient temperatures from –10 °C to 60 °C.
This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of legs, support rams and rams;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health.
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This standard is applicable to all legs, support rams and rams placed on the market for the first time and which are manufactured after the date on which this standard was published.
This European standard does not establish the additional requirements for:
-   Specially corrosive environments;
-   Hazards occurring during construction, transportation, decommissioning;
-   Earthquake.

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This document specifies the safety requirements for hydraulic control devices, including hydraulic valves and
their control elements, valve combinations, control systems, pipes and hose assemblies, fittings, shut-off
devices, measuring devices, filters, built-in pressure limiting and check valves in legs and rams and water
spraying and dust suppression valves when used as specified by the manufacturer or his authorized
representative. Excluded are electronic control devices, pressure generators, and internal valves of legs and
rams (e.g. constant yield valves, see EN1804-2).
Some components are dealt with in other parts of this standard.
NOTE prEN1804-4 also applies to electro-hydraulic control devices. Part 4 also contains requirements for electrical
control elements of valves.
This document applies to hydraulic control devices at ambient temperatures from –10 °C to 60 °C.
This document identifies and takes into account:
- possible hazards which may be caused by the operation of hydraulic control devices;
- areas and operating conditions which may create such hazards;
- hazardous situations which may cause injury or may be damaging to health;
- hazards which may be caused by firedamp and/or combustible dusts.
This document describes methods for the reduction of these hazards.
A list of significant hazards covered appears in clause 4.
This document is applicable to all hydraulic control devices placed on the market for the first time after the
date of issue of this standard.
This document does not specify any additional requirements for:
- use in particularly corrosive environments;
- hazards occurring during construction, transportation, decommissioning;
- earthquakes.

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This standard specifies the safety requirements for support units when used as specified by the manufacturer or his authorised representative. Examples of support units are frame supports, chock supports, shield supports, paired frames and push-pull support systems including the components of advancing and ancho-ring devices which provide support functions. This part of the standard excludes fixing elements on the conveyor, coal-winning equipment, power set legs and rams, valves, hydraulic and electro-hydraulic control units, lighting and signalling facilities and other ancillary equipment.
NOTE Some components are dealt with in other parts of this standard.
This standard  applies to support units used at temperatures from -10° C to 60° C.
This standard also applies to support components and support accesso-ries which are provided if the support unit is fitted with stowing equip-ment. This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of support units;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health;
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This European standard does not establish the additional requirements for:
-   Specially corrosive environments;
-   Hazards occurring during construction, transportation, decommissioning;
-   Earthquake.
This standard is applicable to all support units placed on the market for the first time, which are manufactured after the date on which this standard was published.

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This standard specifies the safety requirements for legs and rams when used as specified by the manufacturer or his authorised representative. Examples covered by the standard include legs, support rams and rams with their mechanical extensions, internal valves and safety devices, seals, hydraulic connections (up to the first hose or Type B valve, see Part 3) and their lifting points but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.
NOTE Some components are dealt with in other parts of this standard.
This standard applies to legs, support rams and rams used at ambient  temperatures from -10 °C to 60 °C.
This standard identifies and takes account of:
-   Possible hazards which may be caused by the operation of legs, support rams and rams;
-   Areas and operating conditions which may create such hazards;
-   Hazardous situations which may cause injury or may be damaging to health.
This standard describes methods for the reduction of these hazards.
A list of hazards covered appears in clause 4.
This standard is applicable to all legs, support rams and rams placed on the market for the first time and which are manufactured after the date on which this standard was published.
This European standard does not establish the additional requirements for:
-    Specially corrosive environments;
-    Hazards occurring during construction, transportation, decommissioning;
-    Earthquake.

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