Sealmaster® Primary seal
Gas-tight primary seal
The Sealmaster floating roof seal was developed over 35 years ago with the aim of creating a seal that adapts to tank irregularities while remaining gas-tight and virtually maintenance-free. The result is the Sealmaster sealing system.
The Sealmaster consists of fully hardened compression plates that extend from the edge of the floating roof to the tank shell and down into the stored product. This forms a non-combustible protective shell over a fully heat-welded vapour barrier that encapsulates the entire vapour space.
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Advantages of the programme
- Gas tight - best available technology for emission reduction
Sealmaster is designed to the guidelines of EEMUA 159 and has a standard working range of R(-X/+3X), giving it the highest BREF rating. The gas-tight design makes Sealmaster an effective solution for reducing the evaporation of both common VOCs and more sensitive HAPs, such as benzene or H₂S. - No gaps
The wide working range, durable and non-deforming materials and effective centring pressure ensure that Sealmaster maintains a seal over time. - Fire retardant properties
Thanks to the Sealmaster system's complete encapsulation of the vapour space with both a flame retardant membrane (tested to DIN 22100/22188) and stainless steel, it is virtually impossible for an edge fire to start or spread. - Product compatible
All materials are carefully selected to be compatible with the stored product.
Construction details
Complete encapsulation of the vapour space with both steel and fabric
Sealmaster has a unique design that differs from traditional mechanical shoe seals in that there is no joint between shoe and fabric. In the Sealmaster system, both the metallic compression plates and the vapour barrier fabric extend from the edge of the floating roof into the liquid. As the vapour barrier is joined together by heat welding, a completely gas-tight encapsulation of the entire vapour space is achieved.
Fully hardened compression moulding plates
A crucial part of the Sealmaster system's material selection is the compression plates, which are made of fully hardened stainless steel and do not deform under pressure or operating friction. This ensures long-lasting and reliable performance compared to competing solutions that use unhardened 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.
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.