Lens seals are impervious to overpressure. With increasing pressure, the contact surface between the flange surface and the lens gasket increases, so that the surface pressure only increases to a lesser extent.
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.
|Steel type designation||Materialnumber||for circulatory temperatures||Code designation on outer edge|
|16Mo3||1.5415||425 to 475||1 Marking|
|13CrMo4-5||1.7335||425 to 520||2 Markings|
|10CrMo9-10||1.7380||520 to 580||3 Markings|
|X6CrNiTi18-10||1.4541||350 to 550||4 Markings|
|12CrMo19-5||1.7362||Max 650°C||1 Notch|
|X6CrNiMoTi17-12-2||1.4571||Max 550°C||3 Notches|