HYDAC components & systems for maximum explosion protection From ATEX to IECEx to NEC – Products for potentially explosive atmospheres

Danger of explosion: this is the reality in different processing and manufacturing procedures with flammable substances, in the chemicals industry or the food technology industry, for example. Machines can be seriously damaged and humans seriously injured if the optimal components and systems are not used. There are specific national and international directives in place for areas at risk of explosion. This is why we offer a broad product range and help you to keep an overview of the jungle of standards and directives.

HYDAC is your partner for the most safety-enhancing products

Are you looking for a partner to help you implement solutions that comply with standards? Thanks to the expertise and many years of experience of our trained employees, we are on hand to help you. We support you with problem analysis, design and solution documentation – and also offer an extensive service portfolio even after installation and commissioning.

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More safety for your applicationsGlobal explosion protection with HYDAC

Various technical and/or organisational measures can be taken to provide protection from explosions, preventing injury or death. For this purpose, potentially explosive atmospheres are split into zones according to the frequency and duration of an explosive atmosphere. The individual devices and machines can therefore be designed in accordance with the particular zones. This approach consistently focuses the designer’s attention on safety in all their decisions and actions.

But which directives apply? You will find all of the details about the standards in your country in our Explosion Protection Encyclopaedia.

A development partnership for custom solutions

Experience and quality matter when it comes to dangerous working environments – and HYDAC makes no compromises here. With our many years of expertise and tried-and-tested components, we develop custom actuators, hydraulic units and lubrication units for working in explosive atmospheres. You don't have to do without the advantages of hydraulic systems either. We work with you to check for potential sources of ignition and danger and take these into consideration when designing and producing your system. You get complete computerised technical documentation based on national and international standards.

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HYDAC hydraulic power units

From compact small power packs to complex systems for any operating pressure – we offer you many years of experience in developing, manufacturing, installing and commissioning custom systems for every application and area of use.

HYDAC lubrication units

With many years of know-how and far-reaching engineering expertise, we support you with lubrication, filtration and cooling for turbines and gears in power plants and compressors.

HYDAC autonomous actuators

The autonomous actuator from HYDAC combines a cylinder, drive and control in a compact design. Its special modular system enables numerous versions to be put together, in any installation position. With the integrated hydraulic accumulator, emergency functions can be performed even in the event of a power failure.

HYDAC's valve range for explosion protection For maximum safety: products for potentially explosive atmospheres

HYDAC industrial solenoid valves in a spool design

The HYDAC industrial solenoid valves in a spool design are suitable for the ATEX areas II 2G, II 2D, II 3G and II 3D. 4/2 and 4/3 directional solenoid valves are available. All other valve types from the directional valve product range in nominal size 6 are available on request.

HYDAC industrial solenoid valves in a poppet design

For the ATEX areas II 2G, II 2D, II 3G, II 3D: our industrial solenoid valves in a poppet design are available as solenoid poppet valves in a nominal size of 6. Contact our experts now for advice on your tailored ATEX valve solution.

HYDAC industrial proportional valves 3-way pressure control valve P3DRE06

HYDAC P3DRE06 industrial proportional 3-way pressure control valves are used for ATEX zones II 2G, II 2D, II 3G, II 3D. This allows us to ensure the highest level of safety for your application.

HYDAC hydraulic valves

HYDAC explosion-proof hydraulic valves are delivered with the manufacturer's declaration and have the designation -XC. Contact us now to learn about our product range.

HYDAC cartridge solenoid valves in a poppet valve design

Our currently available 2/2 solenoid poppet valves cover the ATEX zones II 2G, II 2D, II 3G and II 3D. Get advice from our experts now on HYDAC cartridge solenoid valves.

HYDAC filter systems for explosion protection For maximum safety: products for potentially explosive atmospheres

HYDAC vacuum dewatering unit FAM ATEX

Our FAM series dewaters, degasses and filters your hydraulic fluids and lubrication fluids. Efficient maintenance means you benefit from longer oil change intervals and reduced component wear. This results in greater reliability and increased availability of your system.

HYDAC Condition Monitoring Package CMP Ex

With the online fluid monitoring system, you can record solid particle contamination and the fluid condition in potentially explosive atmospheres (zone 1 according to IECEx and ATEX). Thanks to the integrated data logger and IOT gateway, data and warnings can be integrated into higher level maintenance systems and warnings can be sent.


Our HYDAC OffLine Filters in the OLF 15/30/45/60 ATEX series work in potentially explosive atmospheres as robust offline filters for stationary applications in hydraulic systems and lubrication systems with large oil volumes. This results in an improvement in oil cleanliness and therefore higher component service lives.

HYDAC filter pump transfer unit in OFU ATEX

The Filter Pump Transfer Unit OFU is used as a mobile oil servicing and care unit for filtration when filling systems or repumping hydraulic media and lubrication media. The efficient maintenance of the lubricant means you increase both the performance as well as the service life of your system.

HYDAC pumps for explosion protection For maximum safety: products for potentially explosive atmospheres

HYDAC axial piston variable displacement pump PPV100S

The axial piston pumps of the PPV100S series have a diverse range of controllers. They also impress with their long service life, a low level of operating noise and short control times. They are available as single and multiple pumps.

More information on HYDAC axial piston pumps

HYDAC sensors with explosion protection For maximum safety: products for potentially explosive atmospheres

HYDAC pressure transmitters

Our pressure transmitters and differential pressure transmitters are available in different ignition protection types and are certified according to ATEX, IECEx and for the North American market (CCSAUS). In addition to applications such as in hydraulics in the oil and gas industry, a special version is also available that was specifically developed for measurement tasks with the medium of water.

HYDAC pressure switches

HYDAC pressure switches in an intrinsically safe design are ATEX-certified. In the flameproof enclosure ignition protection type, the devices are even available in a multiple approval according to ATEX, IECEx and for the North American market (CCSAUS).

HYDAC temperature transmitters

Our temperature transmitters are available in different probe lengths up to 350 mm. The devices are available in different ignition protection types and are certified according to ATEX, IECEx and for the North American market (CCSAUS).

HYDAC flow rate transmitters

The HYDAC flow rate transmitters in a stainless steel design can be used with up to 420 bar operating pressure. Like almost all of our sensors for use in potentially explosive atmospheres, the devices are available in different ignition protection types and are certified according to ATEX, IECEx and for the North American market (CCSAUS).

Explosion protection encyclopaedia National & international specifications

Europe – ATEX directives

The EU has issued two harmonised directives for Europe relating to health and safety.

Requirements for machinery and equipment

Directive 2014/34/EU of the European Parliament on the harmonisation of the laws of the member states concerning equipment and protective systems for use in potentially explosive atmospheres. This directive governs the use of both electrical equipment and non-electrical equipment in potentially explosive atmospheres. It is mainly targeted towards the manufacturers of devices and components that are to be used in potentially explosive atmospheres. It replaced the first ATEX directive

94/9/EC. Since the 20th April 2016, all new products launched on the market must be certified in accordance with the new Directive 2014/34/EU. All certificates issued under Directive 94/9/EC will remain valid, however.

Requirements that apply to the system builder/operator

Directive 99/92/EC (ATEX 153) defines the minimum requirements for health and safety in workplaces, for operating conditions and for the handling of products and materials in potentially explosive atmospheres. The directive divides up the workplace into zones and defines criteria for categorising the products inside these zones.

Transposition into national law

The directives have been transposed into national law in the countries of the European Union. In Germany, Directive 2014/34/EC was transposed as “Ordinance 11 relating to the Product Safety Act” – also known as the Explosion Protection Ordinance (ExVO). Directive 99/92/EC was transposed as the Ordinance on Industrial Safety (BetrSichV) and the Ordinance on Hazardous Substances (GefStoffV).

International regulations – lECEx

The IEC publishes globally standardised regulations for electrical technology and electronics. Technical committees compile the standards for the various specialist areas. To ensure harmonisation, the standards published by the IEC are mainly adopted in national and European standards without any major changes made. IEC publications concerning the explosion protection of electrical devices and systems are compiled by the Technical Committee TC31. As a certification scheme, the IECEx creates a global framework for the independent inspection and certification of devices and services relating to explosion protection.
Like ATEX, IECEx divides the areas at risk into zones on the basis of the frequency and duration of the hazard.


In the US, electrical equipment that is used in potentially explosive atmospheres is governed by the National Electrical Code (NEC).

Unlike the regulations in Europe and the IECEx scheme, the NEC 500–504 divides the potentially explosive atmospheres into three classes (Classes I to III for gases, dusts and fibres) and two divisions for the frequency and duration of the presence of these substances. In 1996, NEC 505–506 introduced a zone model similar to the international scheme, parallel to the class model.
Equipment that is to be used in mining is certified according to the regulations of the Mine Safety and Health Administration (MSHA).

Canada – CEC

In Canada, approval is issued in accordance with the Canadian Electrical Code (CEC 18). The classification of the areas was previously based on the division model, as is the case in the USA. Since the last revision of the CEC in 2015, the zone model exclusively applies for new systems and new designs, similar to the IECEx. Old equipment according to the division model can continue to be operated according to the previous regulations (Annex J18). The Canadian provinces decide on the implementation of the CEC separately. Supplements are sometimes added.

Brazil – INMETRO

Brazil’s current set of regulations is the Inmetro Directive 179/2010. This directive directly accepts certificates in compliance with the IECEx scheme, but unlike IECEx certificates they are only valid for three years. Other certificates such as ATEX are only recognised if they are harmonised with the IEC standards 60079.

Eurasian Customs Union – TR CU 012

Russia formed the Eurasian Customs Union (EACU) with Belarus, Kazakhstan, Armenia and Kyrgyzstan. This resulted in uniform regulations being implemented in these countries. Explosion protection is regulated in the TR-CU 012/2011 directive. EAC certificates can be issued for a once-off delivery, for 1, 3 or up to 5 years validity. ATEX or IECEx certificates are accepted as the basis for the EAC certification.

India – PESO

In India, electrical equipment in potentially explosive atmospheres needs to be approved by the PESO – Petroleum and Explosive Safety Organization. For the approval of equipment, the Indian regulations differentiate between devices manufactured in India and devices imported to India. For Indian devices, the national standards apply exclusively. These are based in part on the older versions of the IEC and EN standards. For imported devices, IECEx or ATEX certificates according to the latest standards are required. Approval can only be granted by the CCoE – Chief Controller of Explosives via an accredited Indian test laboratory. Test reports issued by non-Indian test labs are taken into account in the obligatory inspection. The Director General of Mining Safety (DGMS) is responsible for products used in mining.

China – NEPSI

Certification in China is similar to the IECEx scheme. It is based on IEC and EN standards that have been adopted or modified. ATEX or IECEx certificates can be used as a basis for the Chinese certification. NEPSI certificates must be renewed after five years.

Korea – KOSHA

Certification is also carried out in accordance with the IECEx scheme in Korea. The Korean regulations are also based on IEC and EN standards that have been either adopted without change or modified. ATEX or IECEx certificates that have already been issued can form the basis of certification, although additional national regulations must be taken into account.

Japan – TIIS

In Japan, electrical equipment used in explosion protection applications must be certified by the TIIS – Technical Institution of Industrial Safety. The standards for ignition protection types are mainly based on the standards in the IEC 60079 series. Older editions of these standards have been harmonized in some cases, however, and amendments and deviations have been included. TIIS certificates are valid for 3 years and then need to be renewed or extended. The standards only apply to devices for areas at risk of gas or dust. Group I (mining) devices do not fall under the TIIS scheme, and also do not play a great economic role, as there is only one commercial coal mine in Japan.

Australia, New Zealand – IECEx

Australia and New Zealand have adopted the IECEx scheme in their national regulations. This means that IECEx-certified products can be used directly. The state of Queensland is an exception. They still have their own approvals here to some extent. The administration office for the IECEx system is based in Australia.

On the safe side with HYDACExplosion-proof products for wide range of industries

We have been developing and supplying certified components and systems to a wide range of industries for years. In doing so, we place particular focus on quality assurance, reliable identification and flawless tracking of our products – the required documentation is enclosed with our delivery as standard. We help you to find holistic solutions thanks to our cross-industry expertise. We are at your service worldwide.

Oil and Gas

Whether it's upstream, midstream or downstream – HYDAC is your contact for components and systems in the offshore and oil and gas industries.

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Maritime Technology

Whether it's winches, lifting equipment or stabilisers. Discover our products for shipping applications. Your partner in the maritime industry.

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Brochures about explosion protection Would you like to learn more about explosion protection and designs which minimise risks? Our guide will give you all of the detailed information you need – or you can get an overview with the HYDAC ATEX poster.

Contact our explosion protection experts

We will provide you with information on the latest directives and approvals. Contact us with your questions – we're happy to help you.

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HYDAC industrial valves
Topics & Products
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Whether it's for industrial applications or for use in mobile machines: thanks to our flow-optimised spools and housings, we're able to offer you precision-fit valve technology, tailored to your requirements. With HYDAC, you will also find a solution for continuous adjustment of the volume flow or pressure in your system. From directional valves and control valves to switch valves and proportional valves – we cater to your requirements. Discover our components and get some advice!