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Geo Furnaces

Try “pit furnace”, “Fibrothal” or “electrification”.

    Projects

    Case studies from the shop floor.

    Furnaces we've diagnosed, rebuilt and electrified, and what changed on each.

    How we work

    From first visit to a furnace back in production.

    One team at every step, answerable for the result.

    1. Step 01

      Listen

      Your process, your parts and what the furnace is doing wrong, in your own words.

    2. Step 02

      Assess

      On site: atmosphere, heat loss, uniformity and controls, measured rather than assumed.

    3. Step 03

      Design & specify

      The fix engineered for your process, with every component specified.

    4. Step 04

      Build & install

      The fix built and installed to the design, with the site work managed end to end.

    5. Step 05

      Commission & validate

      Calibration, trials and a uniformity survey before the furnace goes back to production.

    6. Step 06

      Stay with it

      Maintenance, spares and support for the life of the furnace.

    6 projects

    The furnace pit glowing at operating temperature after the retrofitRetrofit

    Pit furnace

    Retrofitting a pit furnace using a Fibrothal based heating system

    An automotive components manufacturer's pit furnace re-lined with a Fibrothal heating system and ROB elements designed for line voltage, so the power transformer and its losses could go.

    Per batch
    1,200 kg
    Rated power
    115 kW
    Sealed quench furnace chamber glowing at temperature, door open, with a loaded fixture basket insideRetrofit

    Sealed quench furnace

    Bringing a sealed quench furnace back into production

    A bearing manufacturer's sealed quench furnace was not in working condition. We rebuilt it across eight workstreams and handed it back to production in January 2026.

    Workstreams in one revamp
    8
    Quench-oil level sensors
    2 → 4
    Converted sealed quench furnace chamber glowing at operating temperature, door openElectrification

    Sealed quench furnace

    Converting a gas-fired sealed quench furnace to electric heating

    A gear manufacturer's gas-fired sealed quench furnace converted to electric heating, with elements in radiant tubes and thyristor control, running at 920–980 °C.

    Operating temperature
    920–980 °C
    Bell furnace casing during fabricationNew furnace

    Bell furnace

    A new bell-type annealing furnace for cast iron

    A new 60 kW bell-type annealing furnace for cast iron: a Fibrothal heating system, two heating zones and a PLC control panel with SCADA, running at 950 °C.

    Capacity
    2 MT
    Rated power
    60 kW
    The hood after installation of the new heating elementsRevamp

    Rotary hearth furnace

    Revamping a rotary hearth furnace that kept failing

    A bearing manufacturer's rotary hearth furnace kept losing element connections and hood insulation. We redesigned the elements and their cold zone, and relined the hood with high-temperature ceramic board.

    Charge weight
    300 kg
    Rated power
    180 kW
    The furnace's new Fibrothal heating system, wire elements set into the hot face around the crucible pitRetrofit

    Aluminium holding furnace

    Revamping of Aluminium holding furnace

    An aluminium holding furnace where every crucible failure took the SS310 heating elements down with it, for 15 days at a time. We rebuilt it with a Fibrothal heating system and Kanthal AF elements at line voltage, and a crucible problem now costs about 2 days.

    To recover from a crucible failure
    15 → 2 days
    Charge capacity
    300 kg/h

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