Profiled sealing element for muff couplings - has three cylindrical rubber or plastic layers connected in S cross-section
The sealing element is made from rubber or thermoplastic material and is for stonework or earthenware pipes that are connected in line. Unlike the normal tar or oakhum seals, this design can be used for pipes of large diameter. The seal (1) has a cylindrical outer surface (3) and two inner layers (4, 5) connected together to form an S cross section. The outer part of the S is filled by the wall of the muff while the inner layer of the seal (5) presses onto the plain pipe end. Radial ribs (9, 10) keep the inner layer sealed against the gap between the h pipes. The front corner (8) fits over the muff and is reinforced at the leading edge.