Floating Roof Seals
With over 20 years experience of floating roof seals and drain systems for floating roof storage tanks our engineering team can adapt any of our seal designs to suit your particular roof configuration. In particular if you have tanks that suffer from tank shell distortion we can make a sealing system that will provide an effective sealing solution.
We can also quote & supply for replacement parts (retro-fit) for older types of Seals subject to suitable drawings being supplied by the purchaser.
All our Floating roof tank seals are designed to withstand environmental conditions, stored product, tank data including rim space data/out of roundness surveys & emission control.
Different types of seals & combinations are available to suit pontoon & double deck external floating roof tanks & fixed roof tanks with pan deck roofs or aluminium decks.
Floating roof tank seals normally fall into
3 different categories:
- Primary Seal
- Secondary Seal
- Double Seal
Primary Seal
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 counterweight system (PTG-1) is perferred to the coil spring or pusher bar system as the sealing pressure is constant over time.
Secondary Seal
Rim mounted secondary seals are fixed at the top of the rim plate on the floating roof. These seals are always fitted above a conventional primary seal. A tight fitting secondary seal acts as an excellent secondary vapour barrier containment & also protects the tank contents & primary seal against weather elements & debris.
Double Seal
The most effective double seal is the Tubeseal primary seal with the PTG-D100 secondary seal. Of the compression plate designs of double seal the most effective seal is the PTG-D100 for the reasons given in the section on the PTG-D100 Secondary Seal.