This Swagelok® VCR® Nonretained Gasket is made of 316L Stainless Steel. Swagelok Part Number: SS-4-VCR-2-VS.
These VCR (Vacuum Coupling Radiation) fittings and components are precision manufactured and offer a leak-tight, metal on metal seal. They can be used for any fluid flow application and provide leak-tight service from vacuum to positive pressure.
Polished surface finish and high purity materials virtually eliminate these fittings as a source of system contamination. The VCR fitting design has been tested to maximum leak rate of 4x10-9 std cm3/s with silver-plated-copper gaskets, and to a maximum leak rate of 4x10-11 std cm3/s with unplated (Ni, Cu or 316L SS) gaskets.
