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Primary Seals HMT provides many types of Primary Seals for Aboveground Floating Roof Storage Tanks. These Primary Seal designs include state-of-the-art Mechanical Shoe Seals, Wiper Seals, Tube Seals, Foam Seals and special application type seals. These seals are designed for both External and Internal type floating roofs. A wide range of materials of construction is incorporated into each type seal design to ensure compatibility with the stored liquid product and long service life. These seals are designed to keep the stored hydrocarbon vapors from escaping to the atmosphere, even when subjected to adverse service conditions and wide variations in roof rim space. Several of these seal designs allow installation while the storage tank remains in-service.
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