Ex d Flameproof Line Heaters

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The range of Ex d flameproof line heaters are suitable for heating all process fluids which are non-corrosive to the materials of construction, providing a clean and efficient heating method for bulk liquid flow applications. The Ex d flameproof line heater range is certified for use in hazardous areas where the atmosphere is classified as a Zone 1 or 2 (IIA, IIB, IIC) gas group, or a Zone 21 or 22 (IIIA, IIIB, IIIC) dust group.



  • Thermal insulation and cladding
  • Weatherproof terminal enclosure to IP66
  • Internal control thermostats and over-temperature thermostat
  • Alternative materials of construction available
  • Designed for horizontal installation (vertical mounting
  • version available on request)


Certification ATEX / IECEx II 2 G/D Ex d IIC T1 to T6 Gb Zone 1 and 2
ATEX / IECEx Ex tb IIIC T450°C to T85°C Db Zone 21 and 22 (IP66)
CSA (CEC / NEC) Class I, Div 1, Groups A, B, C, D; T1 to T6, Enclosure Type / NEMA 4 or 4X
CSA (CEC) Ex d IIC; T1 to T6 Gb, IP66 (CAN)
CSA (NEC) Class I, Zone 1, AEx d IIC; T1 to T6 Gb, IP66 (USA)
Elements Incoloy 825 or 316L stainless steel sheathed rod-type or removable ceramic core type housed in mild steel or 316L stainless steel
Vessel Mild steel or 316L stainless steel sheath
Cladding Stucco aluminium
Voltage Standard supplies up to 690V (600V CSA)
Construction Flameproof protection to IP66
Working Pressure Up to 10 barg / 145 psig, subject to design parameters
Design Code Sound Engineering Practice (SEP)
Rating Up to 120kW (subject to application)
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