High temperature seals with METAL BELLOWS are MICRO PLASMA WELDED on Swiss Machinery at low amperes of below 10 amps, creating low temperature fusion of bellow and body parts. (Where as conventional bellows are TIG welded at over 20 amperes and result in thermal Distortions in seal components) Size range from Below 10mm Shaft Size to Over 165mm. Pressures sealed Range from Vacuum to over 56kg/sq.cm. Temperature Range from -30° C to over 300° C.