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Explosion-Proof Electric Resistors for Gas Heating

Electric resistors for gas heating are designed to pre-heat process gas, technical gases and natural gas upstream of pressure-reduction stations, expansion valves or industrial burners. In most applications the gas itself is flammable, so the heater must comply with strict surface temperature limits (T-class) and, where required, hold ATEX certification to operate safely in a potentially explosive atmosphere (Zone 1 or Zone 2).

  • Armoured tubular cartridge design, insertable into a thermowell or in direct contact with the gas flow
  • Power density calibrated to stay well below the auto-ignition temperature of the gas being heated
  • ATEX II 2G/2D certification available for zones with flammable gas or combustible dust
  • Typical use: natural gas pre-heating upstream of expansion valves (Joule-Thomson effect), pressure-reduction and odorisation stations, technical gas lines
  • AISI 304/316 materials and sealed sheaths to resist condensate and corrosive agents carried by the gas

The technical drawing below shows an illustrative example configuration: use the guided configurator to tell us the power, length, dimensions and operating temperature required for your gas application.

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Illustrative example

Intended use: Gas

The values shown in the drawing are an indicative reference to help you read the technical diagram: they do not correspond to a real model, price or product specification.

TECHNICAL DIAGRAM — GAS ILLUSTRATIVE EXAMPLE — indicative values, not a real product specification GAS ATEX POWER 3 kW LENGTH 1500 mm DIMENSIONS Ø 60 mm, filettatura 1½" GAS OPERATING TEMP. 450 °C Generic technical drawing, not to scale — actual dimensions will be confirmed in the quote.

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Frequently asked questions

ATEX certification (II 2G/2D) is required when the heater operates in Zone 1 or Zone 2, i.e. in the presence of flammable gas or combustible dust in a potentially explosive atmosphere. The heater also complies with strict surface temperature limits, classified into T-classes from T1 to T6.
It pre-heats process gas, technical gases and natural gas upstream of pressure-reduction stations, expansion valves (to offset the Joule-Thomson effect) or industrial burners, typically at pressure-reduction/odorisation stations and on technical gas lines.
An armoured tubular cartridge design in AISI 304/316 with sealed sheaths to resist condensate and corrosive agents carried by the gas; power density is calibrated to stay well below the auto-ignition temperature of the gas being heated.