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    Non-IBR steam boilers: what the 25-litre rule means for your plant

    No registration, no boiler house, no certified attendant, and steam in minutes.
  • Neotech Insights
  • Non-IBR steam boilers: what the 25-litre rule means for your plant
  • 5 October 2026 by
    Non-IBR steam boilers: what the 25-litre rule means for your plant

    Many plants that need steam assume they also need everything that comes with an IBR boiler: registration, annual inspections, a separate boiler house and a certified attendant on every shift. For most process loads up to 1,000 kg/hr, they don't.

    The rule in one line

    A boiler whose steam-generating coil holds less than 25 litres of water is outside the purview of the Indian Boiler Regulations (IBR). Neotech's coil-type boilers (Revotech, Revotech-G and Minimatic) and Nanomatic steam generators are all built below that limit.

    What that means at site

    • No IBR registration and no statutory annual inspection of the boiler.
    • No separate boiler house. The unit is packaged on one base frame, and needs only water, power, fuel, steam and chimney connections.
    • No certified boiler attendant. The boiler starts and stops automatically against the steam pressure set on its pressure switch.
    • Steam in 3 to 5 minutes from cold. Forced circulation through a small water volume means very little to heat up before steam is available.

    How small water volume stays safe

    With so little water in the coil, explosion possibilities are nil. Every unit is also fitted with a flame-failure device in the sequence controller, low-level control, an audio-visual alarm, an explosion door and a limit switch on the blow-down line.

    Sizes and fuels

    RangeSteam outputPressureFuel
    Revotech300 – 1,000 kg/hr15 kg/cm²LDO / HSD / FO
    Revotech-G300 – 1,000 kg/hr15 kg/cm²PNG / LPG, or dual fuel
    Minimatic50 – 200 kg/hr15 kg/cm²HSD / PNG / LPG
    Nanomatic10 – 190 kg/hr4 – 6 kg/cm²Electric / gas / oil

    What we need from you

    Coil boilers depend on good feed water. Our scope of supply specifies hardness below 5 ppm, pH 8.5–9.5, TDS up to 400 ppm and feed water no hotter than 30 °C, plus a 415 V three-phase supply with double earthing.

    Not sure how much steam you need? The steam calculator works it out from your process and names the model.

    Size my steam boiler

    Diesel, PNG, LPG or a heat pump: what does hot water really cost?
    A worked example for 10,000 litres a day at 70 °C.
    Neotech Energy Systems Pvt. Ltd.

    End to end heating solutions since 1991. Non-IBR steam boilers, thermic fluid heaters, hot air and hot water generators and industrial heat pumps, designed and built in our own factories at Asangaon.

    ISO 9001:2015Riello authorisedMade in India
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    Office & service centre213, East West Industrial Centre, Safed Pool, Andheri-Kurla Road, Andheri (E), Mumbai 400 072
    +91 22 2859 0678 · +91 22 2859 9235
    FactoryShed No. 15/16/17, Rukma Industrial Estate, Mumbai–Nashik Highway, Village Asangaon, Tal. Shahpur, Dist. Thane 421 601
    +91 98210 28660 · +91 98210 99894
    sales@neotechboilers.com
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