Pfannenberg Catalogue

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Ex Signaling devices Safety for man, machine and the environment If it’s about safety, Pfannenberg is always the right choice, because the Pfannenberg brand stands for ‘safety for man, machine and the environment’. Global references speak a clear language. Ex-protected visual and acoustic signaling devices by Pfannenberg are subjected to the toughest demands every day and are in use wherever explosive atmospheres can be formed, e.g. in oil and gas drilling in the North Sea - by Shell DEA, Exxon Mobil ...- or in refi neries and chemical plants - at BASF, Bayer, Degussa … Regardless of whether it’s about corrosion, vibration, shock or alternating climates, you are always on the safe side with Ex alarm products by Pfannenberg! Process gas analysis: CWB-ATEX fl ashing light Oil and gas drilling in the sea. Man and technology in the most confi ned space. BExS 120 ATEX sounder, Ex-PEX 2010 ATEX fl ashing light 188
ATEX guarantees your safety ELECTRO-TECHNOLOGY FOR INDUSTRY Directives In the Ex-Directive 94/9/EU, the European Union has provided a basis for binding uniform requirements for characteristics with regard to the protection of systems, appliances and components against explosion. With these standards, the manufacturer can assume when designing and assessing the explosion protection that he is developing explosion-protected systems, appliances and components that conform to the Ex-Directive 94/9/EU and which are then subjected to uniform binding test procedures by an appointed body of the European Union. A uniform classifi cation of explosion-endangered plants is the basis for the selection, assignment and installation of systems, appliances and components. In order to protect employees, the user is obliged by Directive 1999/92/EU to assess the explosion risk of the plant, to divide the plant into danger zones and to draw up an explosion protection document or a series of documents, which fulfi l the requirements contained in this directive, and to keep them up to date. Through directives 94/9/EU and 1999/92/EU, the prerequisites have been created for a complete unifi cation of the regulations for protection against explosion in the European Union and form a closed system, with which explosions can be effectively avoided in order to protect man, machine and environment. Selecting suitable Ex alarm products The selection of suitable alarm products is essentially governed by two factors, which can be distinguished as follows: Ex environmental requirements Groups and gases Explosion-protected products are catalogued with regard to their different purposes of use. The fi rst distinguishing criteria is whether usage is underground or above ground: Group I: operating equipment for underground mining with a ‘fi redamp risk’ Group II: operating equipment for all other (non-group I) areas A further distinction is made in Group II according to the types of gases present in the operation environment and the temperature class. On the one hand, this describes the maximum surface temperature of the explosion-protected device and, on the other, the minimum ignition temperature of the gas or vapour. For secure protection against explosion, it must be ensured that the surface temperature of the device (e.g. the fl ashing light) is always lower than the ignition temperature of the gas. Classification of gases and vapours into temperature classes and gas groups I IIA T1 ≤ 450°C Methane Acetone Ethane Ethyl acetate Benzene Acetic acid Ammonia Carbon monoxide Methane Toluene Propane Methanol T2 ≤ 300°C Ethyl alcohol i-amyl acetate n-butane n-butyl alcohol T3 ≤ 200°C Petrol Diesel Aviation fuel n-hexane Heating oil IIB Town gas Ethylene – T4 ≤ 135°C Acetyl aldehyde T5 ≤ 100°C T6 ≤ 85°C IIC Hydrogen Acetylene – CS 2 Technology a) Ex environmental requirements b) Functional requirements The gases are classifi ed in groups ABC according to their fl ammability. This in turn generates different requirements for the enclosures of electrical equipment. For explosion-proof enclosures, these include the dimensions of the closure gap. The gas groups are upwardly compatible, i.e. devices that are suitable for use in group IIC can also be used in the groups IIB or IIA. The same compatibility applies to the temperature classes, according to which devices from temperature class T6 can also be used in all other temperature classes. However, devices from temperature class T4 are adequate for most applications. 189
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The complete Spectrum of Signaling
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Do you require further information?
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