High-Efficiency Three Pass Steam Boilers

Engineered for Maximum Heat Transfer, Reliability, and Significant Fuel Savings.

At IndianBoilers.com, our Three Pass Boilers represent the pinnacle of conventional steam engineering. Designed as a horizontal, smoke-tube type system, the “3-Pass” design ensures that flue gases traverse the length of the boiler three times. This maximizes the contact time between hot gases and water, ensuring that every unit of fuel is converted into usable thermal energy with minimal waste.

What is a Three Pass Boiler?

In our 3-pass design, the combustion starts in the first pass (internal furnace). The hot gases then take a turn at the rear reversal chamber to enter the second pass through a set of smoke tubes. Finally, the gases turn again at the front smoke box to travel through the third pass of tubes before exiting through the chimney. This multi-stage heat exchange process allows our boilers to achieve thermal efficiencies of up to 88%.

Key Features & Benefits

• Fully Wet Back Design: Eliminates the need for heavy rear-end refractories, reducing maintenance costs and preventing heat loss.
• High Thermal Efficiency: Optimized heating surfaces and 3-pass technology ensure maximum heat absorption and lower stack temperatures.
• Large Water & Steam Space: Designed to handle fluctuating steam demands and provide high-quality “dry” steam for industrial processes.
• Multi-Fuel Capability: Compatible with Coal, Wood, Briquettes, Agro-waste, Oil, or Gas, offering you flexibility based on fuel availability.
• Robust Construction: Manufactured using IBR-approved boiler quality plates and seamless tubes for a service life of 20+ years.
• Ease of Maintenance: Equipped with hinged front and rear doors for quick inspection, tube cleaning, and ash removal.

Technical Specifications

Why Choose Our 3-Pass Systems?

• Reduced Fuel Consumption: The advanced heat recovery reduces fuel bills by up to 15-20% compared to single-pass or low-tech boilers.
• Quick Commissioning: Our boilers are skid-mounted and factory-assembled, requiring minimal site work and civil foundations.
• Compliance & Safety: Fully compliant with Indian Boiler Regulations (IBR 1950) with multi-level safety interlocks for pressure and water levels.

Core Industry Applications

Our 3-Pass boilers are the trusted choice for various high-demand sectors:

• Textiles & Garments: For dyeing, printing, and finishing processes.
• Chemical & Pharma: Precise temperature control for reactors and sterilization.
• Food & Beverage: Reliable steam for pasteurization, cooking, and packaging.
• Paper & Packaging: Efficient drying and corrugation processes.