›Viewport Weld Stubs
Nor-Cal Products manufactures an extensive line of high and ultra high flanged vacuum viewports. Viewport Weld Stubs include an o-ring (Viton) sealed fused quartz or 7056 glass window assembly with a 304 stainless steel tube stub from 2-1/2 OD - 6 OD. The tube stub is provided as a means to install (by welding) the viewport into a new or existing vacuum chamber wall. The quartz windows are easily replaced if damaged by dis-assembling the flange set.