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Expansion Tanks Manufacturers and Suppliers

IQS Directory provides a detailed list of expansion tank manufacturers and suppliers. Find expansion tank companies that can design, engineer, and manufacture expansion tanks to your specifications. Peruse our website to review and discover top expansion tank manufacturers with roll over ads and complete product descriptions. Connect with the expansion tank companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of coolant expansion tanks, aluminum expansion tanks, and 10 gallon steel expansion tanks of every type, IQS is the premier source for you.

Leading Companies:

  • Oak Lawn, IL 800-282-1574

    If you are looking for innovative pressure vessels, you’ve come to the right place! We actively manage your project every step of the way. We keep you informed of what we are doing to ensure we keep up to your standards and delivery times. We will deliver our products on time-every time! Contact us today or visit our website to find out more!

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  • Gladwin, MI 989-426-4768

    Gladwin Tank Manufacturing specializes in custom designed and built ASME tanks and ASME jacketed weldments of any shape or size made from carbon steel, stainless, duplex and nickel alloys.

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  • West Alexandria, OH 937-839-4604

    With our design and production capabilities, Rexarc is an industry leader in the area of custom pressure vessel fabrication. We operate a large manufacturing facility and build ASME code and non-code pressure vessels in application-specific configurations and deliver them at industry-leading turnaround times. Using powerful software tools, our in-house engineering team develops welded steel designs, and our production staff then fabricates vessels that exhibit an impressive caliber of quality. We have an extensive background with a wide range of process media as well as high-pressure applications.

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  • Springfield, MO 417-459-9906

    Sho-Me Fabrication, LLC is a Missouri based pressure vessels manufacturer. We are a leading and trusted manufacturer, providing the best service and products in the industry. Our highly skilled and experienced workers have quick turnaround with high quality products. Sho-Me Fabrication is able to fabricate your customized product on site or in our facilities. Contact us to see how we can customize a product to fit your needs.

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  • Haverhill, MA 978-469-8280

    EPSI designs high-pressure systems for manufacturing, testing, research and specialized high-pressure applications. With its unique application-specific approach to R&D, manufacturing, and testing, EPSI has built a tradition of excellence in high-pressure engineering and technology worldwide.

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  • Rocky Point, NC 910-675-8999

    Tank Fab is a fully-integrated pressure vessel manufacturer of ASME and API 650 code autoclave systems. Some of our products include ASME pressure vessels and ASME tanks. We have over 30 years of experience designing autoclave systems—trust us with your next project!

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  • Berea, OH 440-243-6800

    Alloy Engineering is ASME code vessel certified and offers extensive expertise in the mechanical design of pressure vessels that will meet rigorous quality standards and procedures. High expertise in the design of vessels fabricated from high-nickel and exotic alloys. Our designs are frequently used in applications with design process conditions up to 1700°F. We also specialize in redesigning current applications to provide more cost-effective and higher performance with longer life.

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Expansion Tanks Industry Information

Expansion Tanks

Expansion tanks are small vessels containing pressurized air that are components of closed water heating systems for both residential and commercial buildings. Modern tanks are called diaphragm expansion tanks and are attached and hang down from the boiler piping on the supply side of the system. Older models were larger, horizontal and connected from above the system.

Expansion tanks are easy to maintain, and if they are pre-charged, these tanks are literally maintenance free. All repairs should be done by a certified plumber. These pressure tanks ensure constant pressure within the piping system, and act as a safety device. Without them, the boiler may explode, the pipes could burst and overflowing is a major concern. They are typically composed of a stainless steel tank, blue or green exterior paint and a rubber spacer called a diaphragm located on the inside of the tank. This diaphragm provides an air-tight seal and divides the tank in half-the bottom is pressurized air, while the top is left open for excess water from the boiler. Since they occasionally hold drinking water, expansion tanks, like boilers or other food processing tanks and water pressure tanks, must be sanitary, non-contaminating and conform to health standards. The interior walls of the tanks need to be smooth and groove free. Besides domestic and commercial closed heating systems, most vehicles contain smaller expansion tanks for their heating systems.

The purpose of expansion tanks is to absorb excess water pressure in a closed water heating system. Any water heated in a closed space will expand. Therefore, heating systems need additional space for the increased water volume when it is at a high temperature. The excess water enters the expansion tank, which is filled halfway with pressurized air at 12 psi and divided by a rubber diaphragm spacer. While the water volume is up, the extra water fills the tank. The top half of the tank is directly connected with the heating system, and when the temperature decreases, the pressurized air on the bottom half of the expansion tank pushes the water back into the boiler system. This ensures there will be no pipe damage because of too much pressure. Water heating systems without expansion tanks risk the internal boiler pressure increasing beyond the release setting of the pressure release valve (PRV). When the PRV opens, the water leaves the system and creates pressure that is too low. Expansion tanks are always properly charged with air, which shouldn't exceed 12 psi, or the water will boil and this consistency is a major benefit to using expansion tanks.

More Expansion Tanks Information

Expansion Tanks
Expansion Tanks
Expansion Tanks - Gladwin Tank Mfg., Inc.
Expansion Tanks - Gladwin Tank Mfg., Inc.



Expansion Tanks Informational Video



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