Trelleborg 104 Delta Seal Sealing System for Sewer and Stormwater Manholes

System Description

Trelleborg 104 Delta Seal 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. The joint design is standard in many countries. The special design of the joint and seal make the system easy to centre during jointing. This design permits installation with very low force.

Forsheda 104. Design and funtion. Trelleborg

Seal Performance

Trelleborg 104 Delta Seal meets the requirement of all relevant current European standards.

Joint performance is dependent on dimensional accuracy and surface finish of socket and spigot. 

Forsheda 104. Seal performance. Trelleborg


  • 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

  • Oil resistant grades are available on request

Size Chart

Examples of sizes

A B Joint GAP


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
 Please contact Trelleborg Pipe Seals for technical advice and joint design recommendations to meet your performance requirements.
Forsheda 104. Trelleborg

Dimensions and designation

All data in millimeter.

On each seal, profile thickness, outer diameter, recommended pipe measurement and production period are given. The corresponding data are also on the packaging.

Subject to change for technical reasons

Video Joint Assembly

Forsheda 104. Trelleborg

Step 1

Stretch the seal onto the spigot and position against the shoulder.

Forsheda 104. Trelleborg

Step 2

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.

Forsheda 104. Trelleborg

Step 3

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.

Forsheda 104. Trelleborg

Step 4

Centre the joint and assemble using suitable equipment.


More detailed information

Data sheet Trelleborg 104 Delta Seal EN


Download (pdf)


Technical Approvals, Patents, Quality Standards

CE Mark


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