Thanks to the pressure applied by the weights, the pressure on the top and bottom of the mechanical seal is maximized. Because of its weighted construction, the materials used are thinner than Carbon Steel and Aluminum. The usage of additional weight is not required, the system minimizes product escape with the effective pressure provided by the springs, unlike the weighted system. Effective seal performance can cover openings up to 200 mm. and it can work with ±100 mm tolerance.
Each seal is customized to fit the tank to ensure maximum performance, long life, and safe operation. Primary seals include a variety of configuration and component options. 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 (made of Teflon) 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. Storagetech Liquid mounted Primary shoe seals can be categorized as PANTOGRAPH and SCISSOR type seals. The most important issue that affects the performance of the sealing system is that the load which is applied to the shoe seals needs to balance and this force covers all openings through the rim. Mechanical seal systems are restricted to the lined storage tanks for not to damage the cladding material.