ATEX valve: ATEX certified pneumatic valve parts

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ATEX valve: ATEX certified pneumatic valve parts

atex valve

ATEX valve: ATEX certified pneumatic valve parts

What is Atex Valve?

Scope of the Directive

This directive is approved by the European Union to facilitate free trade in the EU by meeting the technical. And legal requirements of the member countries for the products intended to be used. Used in potentially explosive atmospheres.

The directive includes equipment and protection systems that can be used in potentially explosive atmospheres caused by the presence of flammable gases, smoke or dust.

The directive covers both electrical and mechanical equipment. The Directive includes harmonization of requirements as well as conformity assessment procedures.

Difference between old national regulations and new directives

– There is only one indicator for mining equipment and other places that could be jeopardized by the explosive atmosphere.

– Directive shows the safety requirements for equipment intended for use in potentially explosive atmospheres caused by the presence of dust and the safety requirements for non-electrical equipment used. in explosive environments.

– It provides the “CE” sign for equipment and protection systems, which can be used in explosive atmospheres.

– Replaces the national regulations on electrical equipment. This new directive has a larger scope than domestic standards.

What is the atmosphere explosion?

A combustion atmosphere is defined as a mixture:

– Flammable (dust, gas, dust or dust) (A)

– oxygen in ambient air = always present (B)

– Under atmospheric conditions, after combustion occurs (C). The combustion process spreads to the entire non-combustible mixture (in the case of fibers, which do not completely burn after combustion).

Implementation of the Directive

Prior to July 1, 2003 (execution date)

Manufacturers can choose to sell and / or use the designed products

– In accordance with Directive 94/9 / EC.

– In accordance with the applicable national regulations for electrical equipment used in explosive atmospheres.


– All products are marketed in accordance with Directive 94/9 / CE.


– The user’s responsibility for direct use of the products depends on the areas he / she has identified. And thus depends on the risks that may occur. The installation must be in accordance with the European Directives. All products used will be subject to directive 94/9 / CE.

In the case of a defect, non-repaired installation products must be replaced by products in accordance with Directive 94/9 / EC.

How to Choose a Control atex Valve

Process manufacturers are faced with many considerations when choosing atex valve. Or gearbox controllers to best meet their application needs. Key aspects to consider include product endurance in demanding environments. Agent validation, ease of installation, maintenance requirements, and product support.

The following tips will help you optimize the atex valve controller choice as well as optimize the performance and value of the product:

Tip 1: Choose a product that is designed to ensure a level

Reliability Reliability and durability are important when choosing a discrete atex valve controller. Today’s atex valve controls need to be rugged to resist the factory requirements.

Look for products that have been tested for durability in extremely high and cold temperatures. And show resistance to damage or splitting, even in corrosive environments or abusive conditions.

Reputable manufacturers will provide durability testing for millions of cycles to ensure product performance is reliable. Selection of rigidly-tested products increases the life cycle performance and reduces potential replacement or maintenance costs.

Durability testing may include testing in dust rooms to ensure dusty products. Testing against strong water blasts, or even submergence.

The product must be tested against hundreds of corrosive and caustic chemicals at different times, temperatures. And exposure levels and should be proven to be resistant to impact. It is important to understand how a product performs under extreme conditions to have the confidence that it has been designed for durability.

Standard construction materials include aluminum, stainless steel and engineering plastics. And special coating options for exceptional harsh environment treatment.

Ideally, vendors looking for proactive design of products should pass the robust testing standards of different key certification bodies. And have the vision to predict trends and requirements in future.

Tip 2: Search for savings beyond downtime

Sometimes it’s the little things that make up the difference. For example, there are two dedicated conduit entries on your atex valve controller that allow over the wire.

This is especially useful when installing bus networks such as AS-Interface, which requires a drop down for each slave. Be careful not to sacrifice the wires for mounting the solenoid as this will limit the wire’s ease.

Space is always an important consideration. Consider the total installation space, including the width and height of the atex valve controller, as well as accessories such as brackets or solenoids. Also consider the height of the visual indicator. As it can easily break if it is not proportional to the product.

The overall space requirements can be minimized by selecting features such as direct attachments. Which can usually save around 3 inches in height and eliminate frame mounting costs. Integrated solenoids are also an excellent option. They not only save space but need more connector and easy installation process.

Solenoids are very well integrated in Class I applications because they eliminate the need for explosion protection in coils,

Tip 3: Require product flexibility

It is important to look for suppliers of removable atex valve controllers that provide enough options to meet complex application needs. Vendors with comprehensive solutions will provide all important fieldbus protocols such as Foundation Fieldbus, Profibus, DeviceNet, and AS-Interface.

As well as all major sensor options such as limit switch GO Switch, Pepperl + Fuchs proximity sensor, 4-20mA transmitter, and mechanical limit switch.

In addition, full line vendors will have the appropriate pilot atex valve options to meet all application needs, including low power consumption atex valves, flow rates (Cv), Construction materials for most chemicals and caustics, selection of pneumatic fittings such as speed control and manual override.

Tip 4: Identify Suppliers with Global Certificates

Many process manufacturers have plant operations around the world. As factories expand globally, increasing global demand for certified products. Choosing globally certified products makes it easier to standardize around the world, and so operating locations are more efficient and cost-effective.

Mills operate in the same way regardless of location, which improves product quality and service levels, reduces operating costs and training, and increases leverage.

Global process manufacturers should seek suppliers with all major agency certifications (UL / CSA, c-ULUS, CENELEC / ATEX, CE Mark, etc.), ideally in the same model.

Decreasing the number of single parts can significantly increase the cost savings. Providers should also provide solutions for all major hazard classifications, including Zone 0 (Real Safe), Zone 1 (Flameproof / Explosion Proof) and Zone 2 (Non- Incendive, as well as General Purpose Applications.

It is important to choose a supplier who is aware of global certification requirements and provide products to meet these diverse needs.

The time-consuming process design engineers often leave it to atex valve and actuator suppliers to provide any type of converter box or removable atex valve controller that the supplier can recommend. It is important to select and select experienced vendors, with global certified products, proven durability and reputable manufacturing support.

Being informed and active is required. Specifying the desired features will improve performance, save space, support for standards, ease of installation and maintenance. And reduce investment in unnecessary components will ensure that these benefits. is done consistently. It will take a lot of time and trust your activity in the coming years.