Shoe seal for lightweight floating roof

An arrangement for mounting a shoe on a floating roof in a storage tank and maintaining the shoe in contact with an inner wall of the tank, comprising the combination of:

• a plurality of hanger assemblies disposed about an outer rim of the floating roof, each of the hanger assemblies being coupled to the shoe and being pivotally coupled to the floating roof;
• and
• a plurality of buoyant members, each being coupled to a different one of the hanger assemblies and being operative to pivot the associated hanger assembly in a direction to force the shoe into contact with the inner wall when at least partially submerged in a liquid product in the storage tank, each of the plurality of buoyant members comprising a float having a hollow, generally cylindrical tube and a pair of cover plates sealed to opposite ends of the tube.

An arrangement for mounting a sealing shoe on the outer rim of a floating roof in a tank, the floating roof having a plurality of pontoons for floating the roof on the surface of a liquid product stored in the tank, comprising the combination of:

• a plurality of lever brackets, each having an intermediate portion pivotally coupled to the lower end of a different one of a plurality of support brackets, a first end coupled to a shoe and an opposite second end extending beneath an outer rim of a floating roof;
• and
• a plurality of floats, each mounted on the second end of a different one of the plurality of lever brackets.