... Leak Rate:1*10-10PaL/S Vacuum bellows are widely used in aerospace, vacuum industry, semiconductor industry, solar energy photovoltaic ... machines from Korea, and also imported Korean stamping equipments. For better quality test of the welded bellows, it also equipped ... SUS 316L,SUS 304,AM350,Hastelloy alloy C Haynes alloy 242,Inconel 625 and 718 alloy, titaniumFree lengthOptionalService life100-1,000-3 ...