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INTRINSIC SAFETY

INTRINSIC SAFETY DOWNLOAD CATALOG

EX DESIGNATION

EXPLOSION PROTECTION

The important principles for integrated safety explosion protection are as follows:

  1. Measures are taken to avoid hazardous atmospheres whenever possible.
  2. Measures are taken which prevent the ignition of hazardous atmospheres.
  3. Measures are taken which limit the explosive effect to a safe degree.

This differs from:

  1. primary explosive protection.
    These are precautions taken to prevent or restrict the formation of hazardous explosive atmospheres.
  2. Secondary explosive protection.
    This covers the second group of measures, which are intended to prevent the ignition of an atmosphere that is capable of exploding.
Definition in accordance with 1999/92/EC Directive (ATEX 153) Reference values (not standardised) Zone A device from the following device category must be used (see 1999/92/EC-ATEX 153 Directive) e
Area in which a potentially explosive atmosphere as a mixture of air and flammable gases, vapours or mists is present either frequently or over a prolonged period. P>1000 h/a 0 1 G
Area in which under normal operation a potentially explosive atmosphere as a mixture of air and flammable gases, vapours or mists can occasionally form. 10…1000 h/a 1 2
(1G also possible)		 G
Area in which under normal operation a potentially explosive atmosphere as a mixture of air and flammable gases, vapours wor mists is not normally present but may occur for just a short period. <10 h/a 2 3
(1G, 2G also possible)		 G
Area in which a potentially explosive atmosphere in the form of a cloud of flammable air-borne dust is present either constantly, over prolonged periods or frequently. 1000 h/a 20 1 D
Area in which under normal operation a potentially explosive atmosphere in the form of a cloud of flammable air-borne dust can occasionally form. 10…1000 h/a 21 2
(1D also possible)		 D
Area in which under normal operation a potentially explosive atmosphere in the form of a cloud of flammable air-borne dust is not normally present although may occur for just a short period. <10 h/a 22 3
(1D, 2D also possible)		 D

DIVISION INTO TEMPERATURE CLASSES

  • The temperature class indication can be guaranteed only if the ambient temperature specified for the operating device is respected (see Technical Data or Rating Plate). Strict compliance is a mandatory requirement.

  • Once the maximum surface temperature of any apparatus reaches the ignition temperature of the surrounding hazardous atmosphere an explosion can occur.
  • Because of this, all equipment classified to Group II is divided into temperature classes. To allow for the possibility of potential hazardous atmospheres, the lowest ignition temperature must always be higher than the maximum surface temperature.
Temperature classes of flammable gases and vapours and permitted surface temperatures
of the operating device in accordance with DIN EN 50014
Temperature class P>T1 T2 T3 T4 T5 T6
Ignition temperature in °C >450 >300 >200 >135 >100 >85
Maximum temperature in C° 450 300 200 135 100 85
Examples Propane
Methane
Amoniac		 Ethylene
Alcohols
Acetylene		 Petrol
Solvents		 Ethylether
Acetaldehyde		 - Carbon
disulphide

Explosions are dependent on many parameters:

Only for atmospherical conditions and pure substances sufficient comparative values and data are shown. An explosion can only occur where a flammable substance in the form of gases, vapours, smoke and dust exists along with sufficient oxygen to support -combustion and there is a source of ignition.

E.g.:

  • Hydrogen: 4,0 to 77,0 % in air.
  • Propane: 1,7 to 10,6 % in air.
  • Ammonia: 15,4 to 33,6 % in air.
  • Methane: 4,4 to 16,5 % in air.

FUNDAMENTS OF DUST EXPLOSION PROTECTION

TYPES OF IGNITION PROTECTION

DIVISION INTO ZONES

EGAMASTER INTRINSIC SAFETY COMMUNICATION EGAMASTER INTRINSIC SAFETY MEASURING EGAMASTER INTRINSIC SAFETY LIGHTING EGAMASTER INTRINSIC SAFETY DRILLS
COMMUNICATION MEASURING LIGHTING DRILLS
INTRINSICALLY-SAFE TWO-WAY-RAD... INTRINSICALLY SAFE MAGNET PROB... INTRINSICALLY SAFE LED HAND LA... PNEUMATIC,HYDRAULIC...
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EGAMASTER INTRINSIC SAFETY PERCUSSION EGAMASTER INTRINSIC SAFETY IMPACT WRENCHES EGAMASTER INTRINSIC SAFETY TORQUE WRENCH EGAMASTER INTRINSIC SAFETY SAWS
PERCUSSION IMPACT WRENCHES TORQUE WRENCH SAWS
PNEUMATIC,HYDRAULIC... PNEUMATIC, HYDRAULIC... PNEUMATIC... PNEUMATIC, HYDRAULIC...
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EGAMASTER INTRINSIC SAFETY CUTTING AND BEVELLING MACHINE EGAMASTER INTRINSIC SAFETY MIXER EGAMASTER INTRINSIC SAFETY FAN EGAMASTER INTRINSIC SAFETY POWER UNIT PUMP FOR HYDRAULIC TORQUE WRENCHES
CUTTING AND BEVELLING MACHINE MIXER FAN POWER UNIT PUMP FOR HYDRAULIC TORQUE WRENCHES
HYDRAULIC... PNEUMATIC... AXIAL,VENTURI... ELECTRIC DRIVE...
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INTRINSIC SAFETY DOWNLOAD CATALOG