CTS7 Primary foam seal

The CTS7 is a primary foam seal, traditionally known as the most effective primary tank seal with respect to reducing emissions. Its design is based on using a polymer fabric reinforced cover around a resilient foam core being held down by hold down plates. As the seal is very flexible and contacting the tank shell in an extended area the vapour tightness is excellent. Each cts7 seal will be specifically engineered and manufactured to fit the tank involved, making sure the seal will be able to deal with both the product stored as well as with the particular dimensional and design aspects of this tank. Primary foam seals can either be vapour mounted or liquid mounted, and are available both for external floating roof as well as for internal floating roof tanks.

CTS7 Product Features:
- excellent vapour tightness, resulting in maximum
  emission reductions
- minimising rain water ingress to the stored product

- compatible with all stored products, including 100% aromatics
- available in different material combinations, both as vapour mounted
  as well as liquid mounted seal
- fits both vertical and horizontal roof rims
- no rim modifications necessary
- designed for each specific tank
- easy installation
- full installation manuals and project support available
- complies with EPA standards
- successfully used by many major oil and tank storage companies
- can be combined with all known secondary seal designs

Different designs available for CTS7 foam seals:

A foam seal can be executed in many different designs.
Several aspects influence this design:

- liquid mounted or vapour mounted
A foam seal can either be liquid mounted as well as well as vapour mounted. If liquid mounted the seal will not trap any vapours under the seal and emissions will be reduced to an absolute minimum. As a result of the direct contact between the liquid and the seal envelope the requirements for the envelope material are much more demanding however. A vapour mounted foam seal is not in direct contact with the stored product, and therefore less vulnerable. In case of a defect seal envelope it will not be trapping product.
- suspended or non-suspended seal
To reduce materials required for liquid mounted seals these seals are often executed as suspended seals, where a steel construction is used to suspend the seal
- different foam shapes
The shape of the foam and exact geometry will vary subject to the rim gap and other requirements for the seal
- suitable materials
While a foam seal is very efficient, materials used have to be able to deal with demanding circumstances,including the abrasive tank shell contact and, if liquid mounted, the contact between seal envelope and product stored. Each CTS foam seal therefore is engineered to deal with these circumstances and to make sure you will get the best performance possible from the investment made.


Installation
CTS is capable of installing any seal on your tank, but our extensive drawings and installation manuals will facilitate you to have either your own or contractor staff install the seal and, if applicable, the integral foam dam as well. The advantage of having your own (contractor) staff installing the system could be significant, reducing travelling and lodging costs. Experienced CTS supervision is available upon request.

Bottom view cts7 seal after several years in service