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