About Loading Arms
Loading arms are used to load liquids into tanks, trucks, railcars, and other vehicles. They are commonly used in fueling and fluid transfer applications. Loading arms are available in a variety of sizes, lengths, and designs. Most are made of aluminum, carbon steel, low-temperature carbon steel, or aluminum. Products that are designed to handle corrosive or high-temperature materials are often jacketed or lined with polytetrafluoroethylene (PTFE), a highly-resistant plastic with very low flammability. Seals are made of proprietary materials such as Buna N, Viton, and Teflon, registered trademarks of DuPont. To provide flexibility, swivel joints are inserted between straight lengths of the loading arm. Torsion springs or counter weights are sometimes used to provide supported vertical movement. Loading arms with supported booms have a greater reach than devices with unsupported booms. Components and accessories for loading arms include dry break couplers, mechanical or pneumatic breakaway couplers, shut-off valves, level sensors, vacuum breakers, and deflectors.
Engineering Web: Loading Arms - Machine Design
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