The installation of a DXT tank in any of the above mentioned systems reduces the system’s operating costs and prevents unnecessary relief valve operation. The exclusive plastic liner and stainless steel connection ensures effective protection against corrosion and allows the product to be safely used in domestic hot water systems. The heavy duty butyl diaphragm is designed to provide a permanent separation of the water from the air cushion. The tanks are available in sizes from 2 to 21 gallons. The tank’s function is to absorb the increased volume of water which results from the heating process, thereby keeping the system’s pressure below the relief valve settings. The tank is installed in systems equipped with a backflow preventer or as an add-on to direct or indirect water heaters. The two shell welded construction allows the tank to. Designed and manufactured by Elbi since 1975, the XT-XTV Series expansion tanks are solid and have proven reliable in millions of installations worldwide. The DXT Series diaphragm thermal expansion tank is designed for use in domestic system installations for sanitary hot water applications. The XT-XTV Series diaphragm expansion tanks are available in sizes from 2 to 80 gallons in either in-line or stand models (see chart).
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