Econo-Flex® Secondary Seal
Compression Plate Type Rim-Mounted Wiper Seal
The HMT Econo-Flex Secondary Seal is one of the most economical and effective types of secondary seals available. Easily installed and maintained, the HMT Econo-Flex Secondary Seal was designed under the guidance of the stringent gap specifications for secondary seals from governmental regulatory agencies throughout the U.S.
or a secondary seal that is custom-designed to fit specific tank round anomalies, has exceptional gap sealing ability, allows for in-service installation, and has a long service life, choose the Econo-Flex Secondary Seal.
- Product information
- Design features
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- Supplier information
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Benefits
- No gapping
Sized specifically to each tank and constructed from custom-hardened stainless steel to ensure tension will hold up year after year, the HMT Econo-Flex will maintain a tight seal over time. - Long life
All HMT pressure-application components are made from custom-hardened stainless steel to prevent yielding under load, ensuring spring longevity and long-lasting seal performance. - Excellent weather shedding
The HMT Econo-Flex features a wiper tip that conforms tightly to the tank shell, minimizing ingress of rainwater into the stored product. - Capable of being installed in service
Bolt-mounted design means no hot work is required.
Design features
Hardened steel pressure components
Custom-hardened steel will not fatigue over time, maintaining proper sealing pressure against the tank shell and preventing gaps over the life of the seal.
Continuous vapour barrier under compression plates
Econo-Flex uses a continuous fabric vapour barrier under the compression plates, providing much better seal integrity than systems that rely on gaskets between plates.
Narrow compression plates
The HMT Econo-Flex has narrow compression plates for excellent flexibility and conformation to tank shell deviations, but also to reduce wiper tip wear versus compression plate systems with wider plates, which concentrate tip pressure at the overlaps and create uneven wear.
Best-in-class vapor barriers
Premium fabric options ensure optimal product compatibility and life span, even including flame-retardant PTFE options compliant with DIN 22118 standard. We offer a variety of fabric choices depending on your service requirements. Our standard PTFE fabrics are laminated and unsurpassed in terms of durability, impermeability, and service life. HMT’s fabrics will wear extremely well in even the most aggressive services.
Sized to fit the tank
All tank shells are not alike, and it’s critical that seals are designed to handle unique rim-space requirements. HMT’s engineering and manufacturing automation allow each seal to be manufactured to fit the specific rim space and/or verticality data provided by the purchaser, ensuring optimal performance and mitigating the chance of operational issues over time.
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.