Our secondary seals offer an optimal solution for reduction of emission from the area between an external floating roof and the tank shell. Every tank is different and operating conditions vary significantly. Local requirements on emission reduction also play a major role and finally tank seals play a key role in prevention of rim fires.
We offer a full range of secondary seal solutions. Secondary seals need to combine several aspects that can sometimes be contradicting and therefore many designs are available depending on the specific priorities and combinations of safety, storage conditions, stored product properties legislation and weather conditions. The most noteworthy aspect of a secondary seal is safety, a good secondary seal will effectively prevent rim fires regardless of weather conditions.
All our secondary seals can be installed on all possible rim configurations. We will design the seals specifically for each tanks it is installed on and make sure it reduces emission in the best possible way. All our secondary seals are available in a wide range of materials, including galvanized steel and different grades of stainless steel.
The Low Profile ENVISEAL LP is a seal with a low building height ensuring a maximum filling capacity. The height is approximately 150-250mm above the rim of the floating roof. The springs push the tip against the tank shell and ensure functionality These springs are covered with a weather and hydrocarbon resistant antistatic fire retardant PTFE vapour fabric. This construction is key for roper runoff of rain water.
This seal is available in many different configurations depending on the service requirements and actual tank conditions.. It has been successfully used with rim gaps of over 400mm.
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