VDMA 24169 FREE DOWNLOAD

The temperature class of each fan is stated on the individual catalogue page; for certified data see motor rating plate. For that purpose the fans have a classification according to subsequent chart. II 2D oder 1D Zone 22 Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only. In order to be able to indicate and to select electrical apparatus of the product group II with regard to their maximum surface temperature in a simple way, several temperature classes are distinguished. Apparatus with higher temperature e. Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only. Rectangular explosion proof fans type KVD..

vdma 24169

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Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only.

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The maximum surface temperature of an electrical appliance must always be lower than the ignition temperature of the substance 2469 DIN EN4. The temperature class of each fan is stated on the individual catalogue page; for certified data see motor rating plate.

One can correspondingly assign the gases to these classes after their ignition temperature. II 1D Zone 21 Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is likely to occur in normal operation occasionally. It depends on the nature of the gases and streams. The temperature class, the maximum surface temperature and ignition temperature are given in the relevant tables following fdma and table after 7. It considers the frequency and duration of the hazardous atmosphere on each vdms.

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II 3G, vvdma or 1G Dust Zone 20 Zone in which an explosive atmosphere in form of a cloud of combustible dust in air 2416 continuously present, or present for long periods. II 1G Zone 1 Zone in which an explosive atmosphere is likely to occur in normal operation. Search product in archive: Zone in which an explosive atmosphere is not likely to occur in normal operation, and if it occurs it will exist only for a short time.

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Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is continuously present, or present for long periods. The explosive atmospheres are either Gas vapour G or Dust D and need one of the following categories of protection.

Rectangular explosion proof fans type KVD. All relevant regulations must be followed when making electrical connections. Different zones have been allocated to take into account of the different degrees of risk from the concentration of flammable gas or vapour that may arise in an installation.

For that purpose the fans have a classification according to subsequent chart. Calculation of air flow volume Acoustic, noise levels Pressure losses in ductwork Explosion proof protection Motor protection Speed control. Explosion proof protection 7. Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is likely to occur in normal operation occasionally. In order to be able to indicate and to select electrical apparatus of the product group II with regard to their maximum surface temperature in a simple way, several temperature classes are distinguished.

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With fan motors with terminal boxes protection type “e ” is used normally as a sub-group.

vdma 24169

The ignition temperature see 7. Apparatus with higher temperature e. Please enquire for models with non-standard voltages, frequencies and for flameproof models to Ex d. Speed control is permissible only with rectangular explosion proof fans type KVD…Ex and explosion proof roof fans type RD…. For certified data see motor rating plate.

T5 can also be used for substances classified with a lower class e. II 1G or 2G Zone 2 Zone in which an explosive atmosphere is not likely to occur in normal operation, and if it occurs it will exist only for a short time.

vdma 24169

II 2D oder 1D Zone 22 Zone in which an explosive atmosphere in form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only.