These conflat UV grade, zero length fused silica viewports have a flange size of ConFlat (CF) 4.50 inch. ConFlat (CF) flanges are used for ultra-high vacuum applications. These fittings use a copper gasket and knife-edge flanges to achieve the high vacuum seal and can operate down to 10-13 torr (10-11 Pa) and can be heated to 200 °C for bake-out. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2?, 4?, 6, 8, 10, 12, 13?, 14 and 16?. In Europe and Asia, sizes are given by tube inner diameter in millimeters: DN16, DN40, DN63, DN100, DN160, DN200, DN250. These vacuum fittings are made of corrosion resistant stainless steel.

Conflat Flange (CF) Zero Length Fused Silica Viewport CF 4.50 inch

Material: Corning HPFS 7980 Fused Silica, 304 SS 

Thermal Range: -100 C(148F) to 200 C(392F) 

Common Dimensions 

A. 2.69" 

B. 0.25" 

C. 0.68" 

D. 4.50" 

E. 304 SS sleeve & flange