Low Pressure Boilers

A reliable source for Industrial Boiler information and leading Industrial Boiler Companies & Manufacturers.

Low pressure boilers are often box-like and constructed from stainless steel, aluminum, steel or cast iron. Inside the housing is a furnace to burn the fuel and an arrangement of pipes, valves and drums. The flue is the chimney that releases the steam into the system or atmosphere. Read More…

Low Pressure Boilers Low pressure boilers are tanks or vessels that facilitate the transfer of heat from its source to water or steam at pressures below 15 PSI. Though high temperatures within an enclosed space result in increased pressure, these boilers are able to keep pressure at or below the atmospheric pressure of ~14.7 PSI.

Leading Manufacturers

Schenectady, NY  |  518-344-7490

We strive for the best at Unilux Advanced Manufacturing LLC. Our boilers are designed with superior materials. We are proud to say that we produced the world's first UL/FE boiler and our units provide the highest levels of safety and accountability.

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Unilux Advanced Manufacturing, LLC $$$

Pulaski, NY  |  315-298-5121

As the inventor of the vertical tubeless boiler, Fulton has a reputation for success dating back to 1949. We`re a global manufacturer of steam, hot water and hydronic boilers, thermal fluid heaters, and custom engineered systems.

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Fulton $$$

Chattanooga, TN  |  855-753-2645

Since 1987, Industrial Boiler & Mechanical has been selling and offering superior service for new & rebuilt boilers: a wide variety of stock boilers including firetube boilers, watertube boilers, vertical boilers (tubeless), solid fuel boilers (wood, coal & bio-mass), electric boilers & boiler burners.

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Industrial Boiler & Mechanical Co. Inc. $$$

Fremont, CA  |  800-227-1966

Nationwide Boiler is a leading supplier of new and reconditioned boilers for industrial facilities worldwide. We’re a manufacturer’s representative and stocking distributor for B&W package watertube boilers and Superior package firetube boilers, and we have fully reconditioned boilers in a variety of types and sizes. With sales, service and equipment depots throughout the U.S., we strive to provide our customers with reliable equipment and superior service. Call today to learn more!

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Nationwide Boiler Inc. $$$

Greensboro, GA  |  706-453-2050

With over 50 years of knowledge in quality control, process piping, fabrication, pressure vessel installation, and ASME certified welding, we specialize in meeting the stringent quality and diverse fabrication needs of all our customers. B&S is qualified for a wide range of projects; from Chillers and Cooling Towers, to large Compressed Air Systems, to full Boiler Rooms; we have the expertise.

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BSP Boiler & Steam Performance $$$

Buena Park, CA  |  714-562-0196

As a top California boiler company, Manley’s Boiler provides boiler repair, maintenance, monitoring, boiler rental, and installation services. We work on any boiler brand, model, and size of commercial and industrial boiler for customers all across California. Manley’s Boiler is accredited with both “R” and “S” stamps, setting the standard for boiler maintenance and repairs nationwide.

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Manley's Boiler, LLC $$$
placeholder image Unilux Advanced Manufacturing, LLC Fulton Industrial Boiler & Mechanical Co. Inc. Nationwide Boiler Inc. BSP Boiler & Steam Performance Manley's Boiler, LLC

Low pressure boilers are most frequently used for generating steam rather than for heating water. Because boilers do not control the pressure or flow of hot water into a shower head, for example, low pressure boilers would offer little difference from any other boiler like a combi boiler.

Low pressure boilers can range in size but generally do not require the large amount of space that high pressure boilers need. These boilers are typically used in industrial, commercial or manufacturing applications for jobs that require lower pressures, such as space heating. Residences, schools, offices and other average buildings generally do not rely on low or high pressure boilers for heating purposes.

There are two main ways boilers generate steam and hot water. Fire-tube boilers direct the heat produced from burning fuel such as wood, coal or natural gas through heat exchanging tubes that are immersed in water. Thermal energy is transferred from the tubes into the water; the steam is then collected or the water pumped out. Water-tube boilers have water that circulates inside tubes that are exposed to heat. Thermal energy from the tubes moves into the water, heating it and resulting in water vapor and hot water. Water-tube boilers are typically used in high pressure applications because they are capable of safely reaching 1,000 PSI.

Some facilities have both kinds, using water-tube boilers with high pressures for process loads while the low pressure fire-tube boilers are used for heating water and space heating. In fact, the two kinds can be combined in the same area. When high pressure or high temperature steam suddenly decreases in temperature, flash steam is formed and, if there is enough of a pressure difference, is used to supply steam to the low pressure boiler. Regardless of their power, all boilers have safety valves to keep the appliance from operating at dangerous levels.

Low Pressure Boilers Informational Video