HFY Flanged Industrial Immersion Heaters

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The HFY range of flanged immersion heaters are suitable for all commercial and industrial hot water cylinders and process tank heating applications which are non-corrosive to the materials of construction. Each heater is supplied with an adjustable control thermostat, for automatic temperature control and Run Dry, manual reset, over-temperature protection thermostat.



  • Individually replaceable Incoloy 825 elements
  • Weatherproof terminal enclosure to IP54
  • 'Run Dry' over temperature protection
  • Brass or 316L stainless steel mounting flange
  • Heavy duty stud terminals suitable for client cables
  • Designed for horizontal installation only


Model HFY 1216 HFY 1223 HFY 1816 HFY 1823 HFY 2416 HFY 2423 HFY 3027 HFY 4527 HFY 5436
Loading kW 380v 3PH 10.1 10.1 15.1 15.1 20.1 20.1 30.2 37.7 45.3
Loading kW 415v 3PH 12.0 12.0 18.0 18.0 24.0 24.0 36.0 45.0 54.0
Loading kW 440v 3PH 13.5 13.5 20.2 20.2 27.0 27.0 40.5 50.6 60.7
Immersed Length (mm) 405 584 405 584 405 584 685 685 915


Enclosure Heavy gauge, corrosion protected, mild steel having a hinged access door and two undrilled removable gland plates for cable entry (finished in grey stove enamel)
Flange Brass or 316L stainless steel having 8 bolt holes, 10mm diameter on 146mm PCD
Elements Nickel chrome resistance wire compacted in high purity magnesium oxide insulating powder and sheathed in corrosion resistant Incoloy; each element is secured to the flange by screwed compression fixings, making them individually replaceable
Controls A capillary type control thermostat and a manual reset cut-out thermostat are fitted as standard
Working Pressure The maximum allowable working pressure is 6 barg / 87 psig
Thermostat Pockets Two stainless steel pockets are secured into the flange by screwed compression fittings, one of which is thermally linked to the uppermost element
Voltage Standard units are nominally designed for 415V, and are suitable for operation on 380 to 440V electrical supplies; other voltages and alternative wiring configurations available on request
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