With decades of expertise in the steam industry, we specialise in specifying, sourcing, and installing industrial steam boilers tailored to your needs. Whether you’re replacing an outdated system or expanding your boiler estate, we supply modern steam boilers that deliver reliable performance, energy efficiency, and the capacity to meet the specific demands of your facility.
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Steam boilers are designed to generate steam for various applications. While their basic design shares similarities with hot water boilers (link), steam boilers have a distinctive feature: their water tubes extend about three-quarters of the way up the furnace. The remaining space at the top allows steam to expand under high pressure.
Unlike hot water boilers, which operate as a closed system where water is recirculated, steam boilers typically lack a return loop. Fresh water is continuously pumped into the boiler, where it is heated under pressure to generate steam. This steam is then distributed throughout the system for use in its designated application. While some systems may capture and return condensed steam to the boiler, this configuration is less common.
Choosing the right steam boiler for your application requires evaluating several critical factors:
Reversal chambers determine the number of times gases pass through the boiler before exiting. Common configurations are two-pass (reverse flame) and three-pass systems. While both have specific applications, three-pass boilers are typically more efficient due to their larger heat transfer surface area.
The heat transfer area is influenced by the number of passes and the size of the combustion chamber. Greater surface area enhances the boiler’s ability to transfer heat effectively.
A well-sized furnace ensures proper internal flue gas recirculation, enhancing combustion efficiency. An ideal ratio of 3:5:1 for internal flue gas recirculation should be considered during selection.
High-density insulation minimises heat losses from the furnace, improving overall efficiency and reducing energy costs.
Gas side resistance refers to the pressure drop experienced as flue gases travel through the boiler. It can result from deposits or poorly designed pathways. Understanding pressure drop measurements is essential for maximising operational efficiency.
With over 60 years of experience delivering steam-based combustion solutions, we work across a diverse range of sectors, including:
At Dunphy, we collaborate with leading manufacturers in the UK and internationally to deliver industrial steam boilers that prioritise efficiency, reliability, and customisation. Whether you require a replacement unit or a new installation, our team ensures every solution is tailored to your operational requirements.
Queensway, Rochdale, OL11 2SL UK
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