The seal is designed as a sliding seal to which lubricant has been applied between the sliding skin and the body of the seal. The tip of the skin is folded over and glued to the body of the seal to ensure the lubricant stays in place. During installation, the adhesive joint releases allowing lubricated skin to slide over the body of the seal. This design permits installation with very low force, as there is no friction between rubber and concrete. The special design of the joint and seal make the system easy to centre during jointing.
The Forsheda 116 seal meets all relevant current European Standards.
Joint performance is dependent on dimensional accuracy and surface finish of socket and spigot.
Synthetic SBR or EPDM rubber
Hardness 40±5 IRHD
Approved in accordance with EN 681-1
Protected against ozone
Oil resistant grades are available on request
Pre-lubricated seal for concrete manholes
100 % leak-free
Examples of Sizes
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Stretch the seal onto the spigot and position against the shoulder. Equalize the stress in the seal by lifting it at a few points. It is vital that the seal seats against the shoulder around the whole circumfe-rence of the manhole.
Centre the manhole sections and complete the joint. Depending on the joint design it may be possible to joint one side of the manhole, followed by the other.
The position of the seal in an assembled mahole is shown in picture.
If re-joining is required ensure the sliding skin is drawn back to position as shown in the picture.
Technical Approvals, Patents, Quality Standards
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