High-Efficiency 3-Pass Fully Wet Back Boilers

At IndianBoilers.com, we manufacture premium 3-Pass Fully Wet Back Boilers engineered for industries that demand high thermal efficiency and low maintenance. Unlike traditional dry-back designs that rely on heavy refractory walls, our wet-back technology features a reversal chamber completely surrounded by water. This ensures that every bit of heat generated by the burner is absorbed into the water, maximizing steam output and protecting the boiler from thermal stress.

What is a Wet Back Boiler?

In a wet back boiler design, the rear turnaround chamber (where flue gases change direction) is jacketed by water. This eliminates the need for expensive, fragile rear refractory bricks. By using water to cool the rear combustion area, the boiler achieves higher durability, faster start-up times, and significantly lower radiation losses.

Key Features & Performance

• Maximum Heat Transfer: The 3-pass smoke tube design ensures that flue gases travel through the water-backed furnace and tubes three times, extracting maximum energy.
• No Refractory Maintenance: Eliminates the need for high-maintenance rear refractory bricks, which are prone to cracking and heat leakage in dry-back models.
• High Thermal Efficiency: Achieve up to 89% efficiency on its own, and up to 95% when integrated with our advanced heat recovery units (Economizers).
• Reduced Thermal Stress: The water-cooled design allows the boiler to expand and contract evenly, preventing ligament cracking and extending the vessel’s lifespan.
• Compact Footprint: Designed for space-constrained industrial units without compromising on steam capacity or safety.

Technical Specifications

Why Choose Our Wet Back Boilers?

• Faster ROI: High fuel efficiency directly translates into lower monthly fuel bills, allowing the boiler to pay for itself in a short period.
• Reliable Operation: Equipped with world-class burners (Riello/Elco) and advanced safety interlocks for 24/7 industrial performance.
• Sustainability: Lower flue gas exit temperatures mean reduced carbon emissions, helping your facility meet environmental norms.
• Easy Inspection: Feature split-hinged or lift-off doors for easy access to tubes for cleaning and annual IBR inspections.

Core Industry Applications

Our wet-back systems are the preferred choice for sectors requiring clean and consistent steam:

• Pharmaceuticals: For sterile “Clean Steam” and precise reactor heating.
• Food & Beverage: Reliable steam for pasteurization, sterilization, and cooking.
• Chemical Processing: Constant temperature control for sensitive chemical reactions.
• Textiles & Dyeing: High-volume steam for dyeing, finishing, and drying processes.
• Hospitals & Hotels: Efficient solutions for centralized laundries and hot water.

Ready to Upgrade to Wet-Back Technology?

Contact our Ahmedabad-based engineering team today for a customized quote and technical consultation.