There are a wide range of membrane seals for different applications such as omega joints and water-stops that secure the gap by fixing the seal on both sides of the opening.
The allowable movement of the membrane seals depends on the pressure differential across the seal and the strength of the plies. In general, the membrane seals are designed to allow axial and radial movements and/or rotation of the two bridged structures. Gap closure and axial movement will compress the arc of the membrane seal. An increase in the gap is limited by the circumference of the membrane seals arc. The reinforcement of the membrane seals prevents elongation of the rubber. Vertical movements of the joint will cause lateral deformation in the membrane seal. To increase the movement capacity, the membrane seal can be mounted with pre-compression.
Typical membrane seals are the standard Omega seals and our Omega WS seals.