Vapor Mounted Primary Foam Seals: Compressible foam is held by holding down arrangement in envelope, which traps the vapors at the top of the rim gap. The Foam seal designed is a vapor mounted seal. The seal design has been used on tanks from 7.0 M to 92 M in diameter containing the full range of Crude and all type Petroleum products
| Compressible foam is held by holding down arrangement in envelope, which traps the vapors at the top of the rim gap. |