Introduction Gas boilers are water-containing vessels that transfer heat from a fuel source (油, 天然气, 煤炭) into steam which is piped to a point where it can be used to run production equipment, to sterilize, provide heat, to steam-clean, etc. The energy given up by the steam is sufficient to convert it back into the form of water. The combustion efficiency of a conventional boiler is normally 80-82% and in some cases even less (for example: in crude oil boilers). In contrast, modern condensing boiler models achieve combustion efficiencies of 90% and higher. Troubleshooting: Why Won’t My Steam Boiler Produce Steam? 1.Fire tube three pass gas fired steam boiler The Fire tube type gas fired steam boiler is also called the firebox type steam boiler. This kind of boiler is the most commonly used in industrial plants, chemical plants and power stations. The fire tube type gas fired steam boiler is a type of fire tube boiler, which can be divided into single pass or two-pass and three-pass or more according to whether it has one or two passage pipes for water at each end. 2.Water tube three pass gas fired steam boiler The water-tube design is more efficient than the fire-tube design because it has a larger surface area for heat transfer. It also has a compact size and lower pressure, which makes it more expensive to manufacture. A typical water tube boiler uses superheated steam of 600 °F to 700 °F (316 °C to 371 °C), while a typical fire tube boiler uses saturated steam at less than 300 °F (150 °C). 3.Gas fired vacuum hot water boiler When you talk about gas fired vacuum hot water boiler, you have to consider certain important factors. A good boiler should be reliable, efficient and easy to install. Gas fired vacuum hot water boilers are […]