Kryoventil

摘要

The valve comprises a seat and a stem whose mating faces together form a sealed joint. The seat (3) and/or stem (5) are of alloy stabilised by plastic cold-shaping in the Martensitic-texture state, i.e. there is no more indication of temperature-dependent texture conversion into Austenite, and thus no shape-memory effect. The alloy used can be NiTi- or copper-based, with a degree of cold-shaping of between 10 and 30%.