Flange Immersion Heaters – Maltec-H ATEX/IECEx-DN 40 to DN 100


  • ATEX certified according to Directive 2014/34/EU or IECEx, for installation in an explosive atmosphere (risk zone 1 and 2) and for a temperature class from T1 to T6.
  • Horizontal or vertical mounting on the vessels for static fluids or inside vessels for fluid circulation heaters.
  • The heating elements are welded onto a flange conforming to standard EN1092-1 or ASME B16.5, with dimensions from DN40 (1”1/2) to DN100 (4”).
  • ATEX/IECEx certified flange heaters are equipped with safety devices (thermostats, fusible sensors, thermocouples, etc.) for the measurement of the temperature in the fluid or on the heating elements, and optionally, a control device.

ATEX/IECEX certified flange immersion heaters are designed for the heating of non-hazardous fluids (water, oil, heavy fuel, glycol, acids, caustic soda, asphalt, etc.) or gases (air, nitrogen, CO2, etc.) by natural or forced convection up to 50 kW, 750 V 3-ph, 400 °C, 50 bar.

Maltec-H ATEX/IECEx certified flange heaters comprise a very compact bundle of pin heating elements available in various materials compatible with the fluids to be heated (steel, stainless steel, Incoloy, etc.). An electrical control and power supply unit with protection mode “e”, “d” or “de”, in painted steel, cast iron, aluminium or stainless steel, protects the connections from the heating elements to the power supply and from the control and safety devices to the power cabinet. Maltec-H ATEX/IECEx certified flange heaters are designed and manufactured either as part of our standard range or as a customised solution for installation on vessels.


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