ALLENTECH Primary Shoe Seal
Installed in thousands of tanks since 1992
The primary mechanical bulkhead seal is considered a liquid-mounted seal according to API and EPA recommendations. The closely spaced arch springs exert an almost constant pressure against the tank shell, ensuring sealing even around sharp vertical seams and sudden deformations in the tank. Since 1992, thousands of installations have been completed worldwide, eliminating compatibility issues and the need for seal changes for AST operators.
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Advantages of the programme
- High durability
Long service life thanks to fully hardened Type 301 stainless steel pressure mechanisms. - Light weight
Specially designed for aluminium internal floating roofs (IFR). - Excellent compatibility
Stainless steel and PTFE components are compatible with almost all stored products. - Even pressure / Gap sealing
The arch springs apply even pressure to the bucket lid through continuous contact, ensuring no slippage occurs.
Construction details
Threaded S.S. pins welded directly to the shoes
No through holes that can cause corrosion and increase friction against the tank shell.
Arch springs
Maximises shoe flexibility without varying spring pressure. Shoes are pressed against the shell along a long line, eliminating point contact and wear.
The arch springs are bolted on both shoes and IFR
Provides positive static bonding every two feet below the liquid level.
Carefully designed geometry
Eliminates binding, excessive friction and high forces on IFR.
Stainless steel bucket plate, aluminium brackets and PTFE vapour barrier
Compatible with most products. Stainless steel or aluminium fasteners.
Each hanger is firmly reinforced
Ensures stiffness and strength even for tanks that are not perfectly round.
Flexible design, spare parts in stock
ALLENTECH bulkhead seals can be quickly retrofitted to all IFR brands.
Available low profile version, fluid mounted shoe
Maximises storage volume and meets API and EPA requirements.
HMT is a leader in the energy industry for aboveground tank technology and environmental solutions for the storage of oil and gas products.
HMT's products include internal and external sealing systems, including gas-tight primary seals, floating suction and drainage systems, aluminium vaults, pontoon-based floating roofs, full contact roofs, seamless composite roofs and various emission reduction devices.
HMT operates throughout the United States as well as in Europe and the Middle East.
Our customer promise
Right solution, technical expertise and commitment is what you can expect from us as your partner or supplier.
Solutions
Solutions for specific applications in environmental and process engineering, as well as industrial spray processes.
Right solution, delivered on time
Delivering the right solution on time requires co-operation, structure, attention to detail and following a process throughout the project.