HMT - Model SealMaster -External Floating Roof Primary Seal System
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.
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.
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.
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.
All materials are selected to be compatible with the stored product.
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.