... Leak Rate:1*10-10PaL/S Vacuum bellows are widely used in aerospace, vacuum industry, semiconductor industry, solar energy ... the welded bellows, it also equipped high precision vacuum life test equipment from Taiwan, Varian VS leak ... according to customers' requirements.Parameter Reference: Inner vacuumVacuumOuter vacuumOuter vacuum, atmospheric pressureTemperatureNormal temperature -250/450°C(316L), - ...