Secondary Seal
Overview
The HMT FLEX-A-SEAL™ Secondary Seal is one of the most economical and effective types of secondary seals available. Easily installed and maintained, the HMT FLEX-A-SEAL™ Secondary Seal was designed under the guidance of stringent gap specifications for secondary seals from governmental regulatory agencies throughout the U.S. and European markets.
For 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 FLEX-A-SEAL™ Secondary Seal.
Key Benefits
The FLEX-A-SEAL™ Secondary Seal’s advanced design features include:
No gapping — engineered to ensure tension will hold up year after year and seals won’t gap, maintaining a tight seal
Long life — engineered to ensure spring longevity and long-lasting seal performance
Maintenance-free operation — workhorse design and materials
In-service install — no hot work required
Custom designed — each tank has its own variations in roundness and verticality; HMT custom designs every seal to ensure an excellent fit with no gaps
Key Design Features
Continuous fabric vapor barrier under plates
Premium fabrics for long-life and durability of vapor barrier
Bolt-on design allows for in-service installation
Compression plates not bolted together allowing to move and flex, taking shape of the tank shell
Compression plates available in various widths allow for improved sealing to all tank radii
Completely bolted assembly eliminates all rivets which allows for easier and safer tank maintenance
Protector clips to encapsulate metallic bolt head, increasing safety
Tip profile options to counter large welds or tank shell deformities
FLEX-A-SEALTM Resources
FLEX-A-SEALTM Secondary Seal Brochure
Product Photo Gallery
Secondary Seal Capacity Chart
Verticality & Roundness Survey Procedures
Chemical Compatibility Chart
Links to Applicable Standards including: API 650,
API 653 & API 2000
Regulatory links including EEMUA
NFPA – National Fire Protection Association
API - American Petroleum Institute
Tanks 4 - Emissions program
Tanks ESP - Emissions program
