Lens seals

Lens seals are impervious to overpressure. Within creasing loads, the contact surface between the sphericallens surface and thespherical flange groove increases, so that the surface pressure only increases to a lesser extent.

A disadvantage with standard sealing lenses is that, at high pressures and temperatures, the sealing lens can bulge along the circumference and weaken the tension of the connection. Also, at greater nominal diameter, the flange can become stuck in the area of the raised face diameter d5 and lift up at the sealing diameter.

We can also specially produce bellows lenses, lens blind spectacle gaskets and half-lenses. Lens blind spectacle gaskets are made of a sealing lens and a lens blind, which are connected by a ligament. It is also usual to use lens blinds on their own. In this case, it is useful to weld on a small plate to render the lens blind distinguishable.