Immersion heater | ATEX gas / dust zones | FP-C type

The FP-C immersion heater with a flameproof enclosure and replaceable heating element. The devices are ATEX, IECEx, CSA, CU TR, KGS, CNEx, CCOE, and Inmetro certified. The products are intended for heating of process media. The heaters can be installed in pipelines or equipment units operated in Ex-zones. The heaters can be optionally provided with ATEX-certified thermostat controls. The heaters are intended for vertical installation and horizontal installation orientation versions are available on request.

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The FP-C electric immersion heater is ATEX-certified for use in Zone 1, 2, 21 and 22 of explosive gas or liquid vapour atmospheres. The standard versions of the product can be supplied with any electrical power source up to 690 V (600 V CSA). Each heater is provided with a terminal box for easy wiring and the overall design allows fast installation in the processing system (with a threaded end or a connection flange).

The heater is designed for long, heavy-duty operation. The robust enclosure of the heater is made of mild steel (or, optionally, stainless steel, depending on the order) finished by powered coating (or, optionally, epoxy coating). This series of heaters is intended for various types of process media flowing in horizontal piping (there are optional heaters available for vertical installation orientation) and other processing equipment unit types. The heaters are compatible with single or three-phase alternating current or direct current supply systems. The design enables removal and inspection of the heating element without breaching the seal and emptying the processing system of the heated medium.

The heating element is a high-quality, NiCr (80/20) resistance conductor. It is installed in a sheath of Incoloy 800 filled with magnesium oxide powder which provides electrical insulation and an extremely good heat transfer coefficient.

The product is supplied with a plugged 20 mm cable gland. More cable glands can be provided on request. The standard version features overtemperature protection. An optional version can be ordered with a separate terminal box for wiring and installation away from the installation flange.

The permitted ambient operating temperature of the heaters ranges from -60˚C to +60˚C.

  • ATEX: certified for operation in potentially explosive gas or dust atmospheres (Zone 1, 2, 21 and 22)
  • Installation: standard versions are installed in horizontal orientation (there are optional heaters available for vertical installation orientation)
  • Supply voltage: 690 V maximum
  • Casing material(s): mild steel (optionally available in epoxy topcoat)
  • Heating element: high-quality NiCr resistive wire in Incoloy 800 ribbed sheath, filled with magnesium oxide powder
  • Control: Ex-proof thermostat control (optional)
  • Ingress protection: IP66
  • Ambient temperature: -60˚C to +60˚C
  • Optional protection features: thermostat
  • Enclosure finished with epoxy coating
  • Installation orientation version for vertical pipelines
  • Stainless-steel version
  • Optionally available with temperature measurement sensors
  • Bio-fuel oil separators
  • Heating boiler equipment
  • Oil or water heaters
  • Storage tanks
  • Chemical tanks
  • Refrigerating units
  • Compressors
  • Distillation plants
  • Tank heating
  • Heat exchange systems
  • ATEX / IECEx    II 2 G/D Ex d IIC T1 to T6 Gb Zone 1 i 2
  • ATEX / IECEx Ex tb IIIC T450°C do T85°C Db Zone 21 i 22 (IP66)
  • CSA (CEC/NEC) Class I, Div 1, Grupy A, B, C, D; T1 to T6, containing 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 do T6 Gb, IP66 (USA)
  • CU TR (EAC)
  • KGS
  • CNEx
  • CCOE (CCEs)
  • Inmetro

Check out examples of available solutions

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In addition to supplying and installing the heater, we will perform calculations to ensure the required temperature in the room.

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Fan heater – Gas Zone / Dust Zone

The mobile Bulldog® type heater stands out with its compact, lightweight, yet durable design. The device weighs only 28 kg..

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Heaters for enclosures and control stations – Gas Zone / Dust Zone

A compact and efficient heating solution for small and medium enclosures and control stations operating in Ex zones.

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Thermostats for heaters – Gas Zone / Dust Zone

We supply thermostats for use in explosion hazard zones. The devices are fully compatible with our room heaters.

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Donat Czapski Grupa WOLFF zdjecie
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We will answer questions about: offer, technical specification, delivery, assembly.

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