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Anti-condensation self-regulated immersion heaters

Electrical self-regulated immersion heaters are designed for heating gaseous or liquid media for protection of motor carters and compressors.

CETAL is certified for operation in hazardous areas and are used for:

  • Avoiding the dew point
  • Freeze protection
  • Temperature maintenance of equipment without casing

Reliability and robustness are key drivers for our engineers.

Product overview

  • Power range from 50 to 250 W
  • 1PH or 3PH voltage supply
  • Heating length up to 3 m
  • In compliance with the ATEX / IECEx regulation

Advantages

  • Large range of materials and options according to customer process and application
  • Benefit from CETAL’s 50 years of experience as designer and manufacturer!
  • The end-to-end control of the design and production chain allows us to deliver a product which suits your process perfectly

Operating conditions

  • Hazardous areas (ATEX/IECEx) and NEC 505
  • Onshore / Offshore environment
  • Salt atmosphere

Oil

  • Machine oil SAE 10, 30, 40 & 50, max load 2.0 – 3.5 W/cm², material: 316L
  • Mineral oil , max load 0.5 – 3.5 W/cm² acc. to temp, material: 321, 316L
  • Lube oil, max load 2.3 W/cm², material: 321, 316L

Technical description

The Watt density, tube diameter and the tube sheath are chosen to optimize the reliability and robustness (corrosion, temperature) of CETAL equipments.

Technologies

  • Tubular heating element

Tube diameter & material

  • Tube diameter: 6.5 / 8.5 / 10 / 13.5 / 16 mm
  • Tube material:
    • Stainless steel: AISI 321 (1.4541) / AISI 316L (1.4404) / AISI 309 (1.4828)
    • Others: Incoloy 800 (1.4876) / Incoloy 825 (2.4858) / Inconel 600 (2.4816)
  • Tube type: sealed tube

Manufacturing

  • 100% of the components come high quality supplier from Europe
  • 100% manufacturing in CETAL factory

  1. Connection terminals
  2. Tube
  3. Insulation : magnesia oxyde (Mg O), to secure optimized heat transfer and electrical insulation.
  4. Resistance wire: Made of Nickel Chrome 80/20, it is the active part of the heating element (Joule effect)
  5. Cold length
  6. Sealing material: Keeps out external moisture. Different types (silicon, resins, cement) are used depending on the industrialapplication, the external medium and temperature.
  7. Output insulation: Made of steatite ou corundum, it provides dielectric insulation (creepage distance, distance in the air).
  • Self-regulation of the heating element temperature through limitation of the Watt density
  • Supply voltage 230 V 1PH, 400 V 3PH, others on demand
  • Corrosion-resistant AISI 321 stainless steel tube material (1.4541)
  • M45 screw plug with Ø 45 seal, brass or stainless steel
  • Working pressure < 8 bars (not DESP-relevant)
  • ATEX/IECEx connection housing, AISI 316 stainless steel (1.4404) or nickel-plated brass, IP 66 protection rating
  • Connection through M4 threaded rods (2 accessible terminals)
  • Horizontal mounting
  • Protection and marking: II 2 G Ex d IIC T1 to T3 Gb IP66
  • Option: ATEX cable gland, nickel-plated brass, ADL1F ISO M20 type
  • T4 and T3 temperature range
    • B135 type ATEX immersion heater
    • Ambient operating temperature
      • T4 (135 °C): from – 50 °C to + 40 °C
      • T3 (200 °C): from – 50 °C to + 60 °C
  • T3 and T2 temperature range
    • B200 type ATEX immersion heater
    • Ambient operating temperature
      • T3 (200 °C): from – 50 °C to + 40 °C
      • T2 (300 °C): from – 50 °C to + 60 °C
  • According to EC-type examination certificate LCIE 07 ATEX 6004 X
  • IECEx Certificate of Conformity LCIE 11.0017 X
  • c CSA us
  • EAC & CU TR (former GOST)

Electrical tests

  • Power test by cold resistance measurement. Allowed tolerance: -5% and +10% of the nominal resistance value.
  • Insulationtest, direct voltage 500 V, mini cold value is > 100 Megohms
  • Dielectric test, (2U + 1000 V)  x 1,2 during 1 second
  • The stray current and the hot dielectric rigidity can be measured on a sample at operating temperature (on request).
  • 100% of the heating elements are tested before shipment (final control)

Mechanical tests

  • Visual inspection
  • X-ray test (if required)
  • Liquid penetrant test
  • Pressure control test

Dimensional test

  • Critical dimensions are tested