A single-pass design offers the lowest possible back pressure on the source equipment (e.g., your engine or furnace). This is critical because high back pressure can reduce the efficiency or even damage the engine providing the waste gas.

Typically, no. It relies entirely on the thermal energy of the waste gases entering the unit. However, we can provide "Supplementary Fired" versions that include a burner to maintain steam production when the waste gas source is offline.

For effective steam generation, waste gases should ideally be above 350°C. For hot water generation, lower temperatures (down to 200°C) can also be effectively utilized.

The hot waste gases pass through a bundle of smoke tubes. Water surrounding these tubes absorbs the heat, eventually reaching its boiling point to produce steam.

Since the fuel (waste gas) is essentially free, efficiency is measured by the Rate of Recovery. Our units at indianboilers.com are engineered to recover up to 95% to 99% of the available sensible heat from the waste stream.

We offer capacities ranging from 100 kg/hr for small DG sets up to 5,000 kg/hr (5 TPH) for large industrial exhaust systems.

To withstand the potentially corrosive nature of exhaust gases, we use high-grade Mild Steel (MS) or Stainless Steel (SS) for the tubes and shell, depending on the chemical composition of your waste gas.

Yes. The single-pass smoke tube design is easier to clean than multi-pass versions. For high-dust applications, we provide specialized soot blowers or mechanical cleaning ports.

Our standard units operate at medium pressures (up to 10.54 kg/cm² or 17.5 kg/cm²), making them ideal for most industrial process heating needs.

• Steel & Glass: Capturing furnace exhaust.
• Chemical & Pharma: Recovering heat from incinerators or reactors.
• Power Plants: Utilizing DG set or Gas Turbine exhaust.
• Rice Mills: Capturing heat from parboiling processes.

Yes. By cooling the exhaust gases before they reach the atmosphere and reducing the need to burn fresh fuel for steam, you significantly lower your facility's total carbon footprint and thermal pollution.

Because it lacks a traditional furnace and burner assembly, the Single Pass Boiler is very compact and can often be installed horizontally or vertically to fit into existing exhaust ducting.

No. Our engineers precisely calculate the duct size and tube area to ensure the pressure drop is within the limits specified by your equipment manufacturer.

Yes. Just like a standard boiler, "hard" water will cause scaling on the tubes, which acts as an insulator and kills your heat recovery efficiency. A Water Softener is highly recommended.

We offer both IBR (Indian Boiler Regulations) and Non-IBR versions. For most industrial factories, an IBR-certified unit is required to comply with safety and insurance regulations.

The primary task is ensuring the smoke tubes are free from soot or ash buildup. Regular inspection of the bypass dampers—which divert gas away from the boiler if steam isn't needed—is also vital.

The price depends on the mass flow and temperature of the waste gas. On indianboilers.com, current estimates are:

• Small units (500 kg/hr): Starting around ₹4,000,000.
• Medium units (1 TPH to 3 TPH): Range from ₹15,00,000 – ₹30,00,000.
• Large systems (5 TPH): Can exceed ₹50,00,000 depending on metallurgy and automation.

The final price is influenced by the Inlet Gas Temperature, Mass Flow Rate, Material of Construction (e.g., SS tubes for corrosive gas), and the inclusion of Bypass Dampers and Automatic Control Systems.

Since the fuel cost is Zero, the payback period is exceptionally fast. Most of our clients see a full recovery of their capital investment within 12 to 18 months purely through fuel savings.