Correct coupling selection guide Corrosion Protection Depending on the environmental conditions, suitable corrosion protection must be specified for the coupling. Unless otherwise specified in the order, steel and cast iron surfaces are shipped with a simple preservative. Ambient Conditions Because of the environment, the coupling has to meet a large number of additional requirements. Couplings must be as suitable for use in a potentially explosive environment as for use at a high or low ambient temperature. The environment may be defined as chemically aggressive or be subject to laboratory conditions or requirements of foodmanufacture. The following applies to products shown within this brochure which are suitable for intended use in potentially explosive atmospheres. ATEX and ECMachinery Directive Wherever a potentially explosive environment cannot be ruled out, the machinery used must meet special conditions in order to prevent the outbreak of fire as far as possible. Within the European Union, Directive 94/9/EC applies to these applications. This directive, harmonizes the individual states' legal requirements for explosion prevention and clearly defines the procedure for checking and circulating machines and parts. Whether or not a machine is used in potentially explosive atmospheres, the manufacturer is required under EC Machinery Directive 2006/42/EC to assess and as far as possible prevent hazards which may arise fromhis product. The operator has an obligation to ascertain whether an environment is potentially explosive. Details of this are laid down in Directive 1999/92/EC. Themanufacturer is responsible for ensuring that the product is safe as defined in the ECMachinery Directive and conforms to Directive 94/9/EC if the EX requirement is specified by the operator. The drive train mostly comprises individual pieces of equipment which are put together to form a subassembly. If the individual pieces of equipment, such as motor, coupling, gear unit or driven machine conform to Directive 94/9/EC, the manufacturer of the overall unit can limit the risk assessment to the additional hazards which arise from the combination of different individual pieces of equipment. The hazards which can arise from the individual pieces of equipment are assessed by the relevant suppliers. The Directive 2014/34/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres will supersede the Directive 94/9/EC of 23 March 1994 with effect from 20 April 2016. The following applies to the products shown in this brochure with a suitable for intended use in potentially explosive atmospheres: » Products placed on the market before 20 April 2016 meet the requirements of Directive 94/9/EC. » Products placed on the market from 20 April 2016 meet the requirements of Directive 2014/34/EC. The coupling series suitable for use in potentially explosive environments aremarked with EX in the catalogue. FLENDER couplings are to be rated as components according to the new EC Machinery Directive 2006/42/EC. Therefore, Flender do not issue a declaration of incorporation for these products. Overload Conditions Overload conditions are operating conditions that go beyond the limit loads of the coupling. Overload conditions may occur 22 #DriveLineHarmony Environmental Conditions & ATEX Mechanical Power Transmission Couplings