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High-flux bolt heaters

CETAL high-flux bolt heaters reduce the nut tightening and untightening time by heating while improving the safety of operators and heated material

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Thanks to boron nitrid technology, you can drastically reduce your cycle time!

Main uses: tightening / untightening of drilled bolts through thermal expansion, maintenance of turbine engines, pressure equipments, for drop-forge installations, etc.

Main industrial sectors: Shipyards, thermal power stations, metallurgy

Reliability and robustness are key drivers for our engineers.

Product overview

  • Power up to 10kW (higher on request)
  • Watt density up to 40 W/cm² (To be checked)
  • Voltage max. 690 V

Advantages

  • Very short heating time
  • Heating to approx. 350 °C (depending on the bolt material)
  • Easy handling
    • One operator per machine
    • One power outlet per bolt heater
  • Significantly reduces the assembling/deassembling time of large forged and cast-iron parts
  • Capacity to heat only the central part of the bolt
  • Long lifetime: 10 000 cycles
  • Workstation safety through low voltage < 50 V

Operating conditions

  • Normal (non-ATEX)
  • Hazardous areas (ATEX/IECEx) and NEC 505

Liquids, gas and solids

Solids

  • Steel / Stainess steel bolts

Technical description

Technology description

High performance through boron nitrid insulation

The use of boron nitrid as insulation allows to concentrate a lot of energy in a small space. The power is transmitted by radiation.

With this technology, high temperatures can be obtained in a short time, thus reducing to a few minutes the nut tightening/untightening time.

Design

The bolt heaters are designed according to specifications using standard tube diameters.

Lenght and power are defined according to the bolt to be heated (size, Ø of drilling, mounting tolerance).

The bolt heaters can be supplied with 24 V (BT plug), 110 V, 230 V or other voltage.

The heating part of the bolt heaters is indicated through small machined grooves. To avoid incorrect installation, a positioning ring helps identifying the active zone.

CETAL expertise

After customer specification analysis, our engineers will drive you to the best solution for your process.

 

High-flux heating element

Tube material

  • Inox AISI 316L (1.4404)
  • Others on request

Tube / bolt diameters (mm)

 

Ø bolt heater

Ø H11 bolt

10.7

11

11.7

12

12.2

12.5

15.7

16

17.7

18

19.7

20

21.65

22

24.6

25

25.6

26

29.6

30

Other diameters on request

Connection box

Connection / Connection box

  •  24 V or 48 V plug
    • Female aluminum plug
    • Male plug, plastic, with cable
    • Thermal grease

  • Box filled with resin, 230-400 V

    • With HO7RNF or silicone cable
    • Thermal grease

  • Box with handle, 230-400 V

    • With or without LED
    • With HO7RNF or silicone cable
    • Thermal grease
  • Other connection boxes on request

(e. g, RATEAU connection box), can be supplied with simple threaded rods

Temperature control & switching devices

  • Temperature sensors (thermostat, limiter, thermocouple or PT100) in the medium (process control) or on theheating element (safety control), on the flange or in the connecting box.

Electrical

  • Voltage: VAC or VCC
  • Cabling according to main voltage VAC/VCC 1PH + N or 3PH
  • Power: < 10 000 W (higher on request)

Documentation

  • Standard documentation
    • EU Certificate of Compliance
    • Instruction manual
  • On-request documentation
    • Certificate of conformity to the order
    • Supplied according to directives and standard
    • Material certificate 3.1 according to NF EN 10204

Certification (if requested)

  • According to standard to comply with
  • EAC CU&TR

Options

  • Detachable cable (except for box filled with resin)
  • Other connection boxes on request
  • Power control panels
    • Power 5, 10, 15, 20 KVA
    • 24 V / 48 V, primary 230 V or 400 V
    • 110 V / 230 V on request