Sealmaster Primary Seal
Gastight primary seal
The Sealmaster floating roof seal system was developed over 35 years ago, with the goal of making a seal that adjusts to the irregularities of tanks while remaining gas-tight and virtually maintenance-free. The solution is the Sealmaster seal system.
The Sealmaster is comprised of fully hardened compression plates, extending from the floating roof rim to the tank shell and down into the stored product, thereby providing a non-combustible protective sheath over a fully-heat-welded vapor barrier encapsulating the entire vapor space.
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Benefits
- Gas tight - best available technology for emission mitigation
The Sealmaster is designed with guidance from EEMUA 159 and has a standard working range of R(-X/+3X), highest BREF scoring. With a gastight design, the Sealmaster is an effective solution for mitigating evaporation of both standard VOCs as well as more sensitive HAPs such as benzene or H2S. - No gapping
The excellent working range, durable non-yielding and abrasion-resistant materials, and excellent centering pressure ensure the Sealmaster will maintain a tight seal over time. - Fire retardance
Due to the Sealmaster’s full encapsulation of the vapor space with both a flame-retardant membrane (tested in accordance with DIN 22100/22188) and stainless steel, it is virtually impossible for any rim fire to start or propagate. - Product compatible
All materials are carefully selected to be compatible with the stored product.
Design features
Complete encapsulation of the vapour space with both steel and fabric
The unique design of the Sealmaster is different from traditional mechanical shoe seals in that there is no shoe-to-fabric joint. With the Sealmaster, both the metallic compression plates and the vapor barrier fabric extend from the floating roof rim down into the liquid. Since the vapor barrier is spliced by heat welding, the resulting system is a gas-tight encapsulation of the entire vapor space.
Fully hardened compression plates
A critical aspect of the Sealmaster material selection is the compression plate system — comprised of fully hardened stainless steel which will not yield under compression or operating friction. This ensures long-lasting, reliable performance when compared with competitive models that use non-hardened plates.
Durable stainless steel compression plates
Sliding parts in contact with the tank shell are wear-resistant, while the vapour barrier is protected from direct contact with the tank shell.
Continuous compression system
Sealmaster keeps the floating roof centred and dampens horizontal movements, preventing the roof from sticking and the edge seal from being pinched between the floating roof and the tank shell.
Can be designed according to EEMUA or API workspace standards
The R(-X/+3X) working area design is an innovation from HMT. In all conditions, the Sealmaster edge seal remains in contact with the tank shell. Alternatively, the Sealmaster can also be designed according to the API standard ± approx. 10 cm, if preferred.
Flame retardant materials
Stainless steel compression plates and PTFE vapour barrier form a virtually non-combustible system that prevents edge fires and protects the floating roof (vapour barriers tested to DIN 22100/22188).
Documents for download
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.
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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.
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