MRS-1/350 Primary Mechanical Shoe Seal

MRS-1/350 Primary Mechanical Shoe Seal

Maxwell MRS-1/350 Mechanical-Shoe Seal (IFR Rim Seal)

Our Maxwell MRS-1/350 Mechanical-Shoe Seal, also known as a “metallic shoe seal”, is characterized by a metallic sheet (the “shoe”) that is held against the vertical tank wall. The mechanical shoe seal height is 350 millimeters (mm). The shoe is connected by braces to the floating deck and is held tightly against the wall by springs or weighted levers. A flexible coated fabric (the “envelope”) is suspended from the shoe seal to the floating deck to form a vapor barrier over the annular space between the deck and the primary seal.


Our Maxwell MRS-1/350 Mechanical-Shoe Seal is suitable for tanks without appreciable tank shell distortion or where the product stored is particularly aggressive. Unsuitable for distorted tanks shells or where shell coatings have been applied.

The MRS-1/350 can become equipped with counterweights or with a coil spring or pusher bar system as the sealing pressure is more constant over time.



The most commonly used Maxwell Mechanical Shoe Seals either used as a single or combined configuration are:

• MRS-1/350 Primary Mechanical Shoe Seal


All Maxwell IFR Rim Seals can be combined with;

• MRS-70 Secondary Wiper Seal


Finally, when the local requirements are pushing local terminals or refineries to add a tertiare or tertiary or triple rim seal, on request these extra rim seals can be provided by Maxwell.