Seal design & function
Trelleborg 104 Delta is a sliding seal that is stretched onto the spigot end of the pipe or manhole. Lubricant is applied to the socket prior to jointing.
Its design makes it easy to center during jointing, permits installation with very low force and it is standard in many countries.
Joint performance is dependent on dimensional accuracy and surface finish of socket and spigot.
It meets the requirement of all relevant current European standards.
Key features & benefits
- Easy to center during jointing
- Simple to position on spigot
- Suitable for both pipes and manholes
Material
- 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
| A (mm) | B (mm) | Joint GAP (mm) |
|---|---|---|
| 16 | 21.0 | 9.2±1.2 |
| 18 | 25.0 | 10.4±1.4 |
| 20 | 26.0 | 11.5±1.5 |
| 22 | 28.0 | 12.7±1.7 |
| 24 | 30.0 | 13.5±2.0 |
| 26 | 33.5 | 15.0±2.0 |
| 28 | 35.5 | 16.0±2.5 |
| 30 | 38.0 | 17.3±2.5 |
| 33 | 43.0 | 18.1±2.5 |
| 36 | 46.5 | 19.8±2.5 |
| 38 | 49.0 | 20.9±2.5 |
Dimensions & Designation
On each seal, profile, diameter and appropriate pipe dimensions together with date of manufacture is given. The corresponding information is also included on the packaging.
Subject to change for technical reasons.
Stretch the seal onto the spigot and position against the shoulder.
Equalize the stress in the seal by lifting and releasing at a few points. The seal must sit evenly against the spigot shoulder all around the pipe or manhole.
Apply lubricant to the socket. The lubricant must be evenly spread over the surface of the entire socket paying special attention to the radius at the front.
Centre the joint and assemble using suitable equipment.
