Materials available stainless steel and galvanized, and hardware in corrosion resistant stainless steel or Zinc plated materials
Adaptable to any existing or new floating roof tank rim arrangement.
Compatible with stored product, including 100 % aromatics and MTBE.
"In service installation"
No welding or flame cutting
Ground shunts, as per API 2003
Proven comprehensive custom designs
Simple installation and ease of future maintenance
Achieves and Maintains satisfactory emission controls.
On time delivery
Tight fitting minimum gap seals
Allows for "common" mounting hardware for all seals and rim mounted foam dams
Failure free durable designs
Accommodates accidental overfilling without special attention

Wide choice of design options to meet a variety of applications, and special cases:

Welded or riveted tanks
Rim mounted foam dams
Roof positioners
Horizontal or vertical attachment
External or covered floating roof tanks
Designs to fit through 24" dia manholes
Guide Bars / Bazookas
Foam Ports
Minimize freeboard
Wax Scrapers
Inconsistent rim gap
Shell buckles

Mechanical Shoe Seals

Mechanical Shoe Seals comprise a metallic sealing ring, which is held in permanent contact with the tank shell and extends into the product by a system of independent hanger and pusher mechanisms, and with a continuous sealing apron curtain closing the gap between the rim and the top of the “Shoe”. The product VAPOURs are contained between the “shoe “, apron curtain and the floating roof.

"CHANNEL HANGER" & "COMPRESSION SHOE"

SIGNIFICANT COMMON FEATURES

Custom designed for ease of installation, And cost minimization
Failure free durable design
Provides a positive VAPOUR sealing medium
SCAQMD, BAAQMD and EPA accepted
Independent hanger and pusher devices
Available on CFRT & EFRT
In service installation – no hot work required
All top deck installation
No welding or flame cutting
Meets or exceeds all code requirements
Compatible with stored products
Cost effective compliance to air quality standards and rim seal emissions
Conform tightly to shell plate contours
Available in a variety of materials - Metallic….stainless steel, galvanized steel or zinc plated materials Fabric……chosen for product compatibility
Extensive list of apron curtains
Adaptable to existing rim and shell configuration, including wide variations in rim gap
Compatible with welded, lapped or riveted tanks
Grounding shunts per API 2003, as required

The seal is characterized by a shoe-to-shoe slip joint connection, which allows for any variation in the rim space or irregularities between the rim and tank shell, while containing the product VAPOURs.

The seal is characterized by a bolted & gasketed (slotted) shoe-to-shoe connection, which allows for any variation in the rim space or irregularities between the rim and the tank shell, while containing the products VAPOURs.

Mechanical shoe seals comprise of metallic sealing Ring, which is held in permanent contact with the tank shell and extends into the product by a system of independent hanger and pusher mechanisms. The Channel hanger type assembly successfully maintains a constant seal elevation even with a wide rim space. The innovative design of the hanger assembly allows installation of the complete Mechanical Shoe Seal with the tank remaining "in-service". The Material used for the Seal Assembly is Galvanized or Stainless Steel. The VAPOUR Barrier fabric is Polymer coated, which is selected on the basis of its compatibility of stored fluid.

Advantages of Mechanical Shoe Seals

Mechanical Shoe Seals are recommended as the “Best Available Control Technology” for Internal as well as External Floating roof tanks.
This seal is 100% compatible to any type of products such as Benzene, methanol, toluene, naphtha, MTBE, ETBE or TAME etc.
Unique Channel hanger mechanism maintains levelness of metallic shoe, eliminating seal gaps
Accommodates wide variations in rim-space
Multiple Pusher Plates for uniform pressure of shoe on tank shell
Compatibility with virtually all stored products
Compatibility with welded or riveted tank shells
Available with Secondary Seal Systems
Available with wax scrapers.
The Seal Arrangement does not cause any Friction while rubbing against the Shell as frictional ignition at rubbing surfaces depends on relative velocity and pressure at contact points.
The unique Metallic Channel hanger design enables the transfer of Static Electricity to the tank shell which in turn is protected by a shunt which carries the static energy from the roof to the tank shell.
Low maintenance cost, long life and economical price.