Technical Information
The bellows of rubber expansion joints consist of an inner and outer elastomer layer and several intermediate layers made of Nylon-cord tissues. The Nylon-cord or Aramid layers ensure high resistance against internal pressure and vacuum. The rubber expansion joints with bellows type A, B, D and S are fitted with loose flanges; the bellows type A, B and D can also be equipped with screwed sockets. The steelwire reinforced rims of the bellows with loose flange design have a sealing effect.
The rubber expansion joints with bellows type C have fully modeled rubber flanges with loose back flanges.

Rubber expansion joints can be run through by various media, if the maximum permissible operating conditions are respected. Details may be taken from the according tables.

3140 00S-D
3140 DFS-D
3140 00S-A
3840 DFS-A
3140 00S-B-EPDM
3840 DFS-B-EPDM

With loose flanges, for axial or lateral movement compensation or vibration absorption. Types DFS with sound absorbing tie rod restraint for lateral movement compensation or vibration absorption

DN according to tables
PN 6 - 16

3140 00S-C
3160 00S-A
3160 00S-D
3160 00S-B-EPDM

C: rubber flanges with loose flanges
3160 with screwed sockets
for axial or lateral movement compensation or vibration absorption.

PN 6 - 10
PN 10