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Scissor Shoe Primary Seal
The
HMT Scissor Shoe Primary Seal for above-ground storage
tank floating roofs has gained EPA acceptance for two
reasons. The seal has superior long-lasting
qualities and positive vapor sealing ability when gaps
are present between the seal and the tank shell.
Our
Engineers redesigned the traditional shoe type seal in
order to eliminate coil springs and under roof
counterweights. The result is the HMT Scissor-Type
Hanger Assembly. It successfully maintains a
constant seal elevation even with wide variations in rim
space. Seal gaps caused by uneven shoes are
eliminated.
The
HMT Scissor Shoe Primary Seal is available in galvanized
or stainless steel. Both provide economical
corrosive protection. The innovative design of the
hanger assembly allows installation of the complete
Scissor Shoe Primary Seal with the tank remaining
"in-service".
 
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Advanced features
of the HMT Scissor Shoe Primary Seal:
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In-service
installation available
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Unique Scissor
type hanger mechanism maintains levelness of metallic shoe,
eliminating seal gaps
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Accommodates wide
variations in rim-space
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Multiple Pusher
Bars and Pusher Plates for uniform pressure of shoe on tank shell
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Quarter-hard
stainless steel pusher assemblies for extended service life
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No coil springs or
under-roof counterweights
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External and
Internal floating roof designs available
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Compatibility with
virtually all stored products
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Compatibility with
welded or riveted tank shells
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Compliance with
federal, state and local regulations
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Available with
Secondary Seal Systems
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Available with wax
scrapers
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Wide Range of Seal
Materials:
Metallic:
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Stainless Steel
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Galvanized Steel
Primary Vapor Barrier
Fabric:
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Petrolam @ Laminated
Flouropolymer (Teflon), feberglass reinforced
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Urethane, polyester
reinforced
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Buna-N Vinyl,
fiberglass or nylon reinforced
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Viton, fiberglass
reinforced
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These and other
fabrics available in various thicknesses
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