These Quick Flange demountable vacuum fittings have a flange size of KF16, NW16 with a glass viewport view diameter of 0.56 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the glass is between 350nm to 1500nm. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. 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 corrosive resistant stainless steel. At present we have the following demountable viewport sizes listed in the graphic below and have replacement viewport glass and O-rings for sale.

These Glass Replacement viewports fit our KF-16 Demountable Viewports. View diameter of 0.56". Glass Thickness 0.159," No Coating, Max Bake Temperature: 150°C, Operating Wavelength: 350nm~1500nm.

Viton Replacement O-Ring for Demountable Viewports. KF16, View Diameter 0.56 in., Bakeable up to 150°C.

Kalrez 4079 Replacement O-Ring for Demountable Viewports KF16, View Diameter 0.56 in., Bakeable up to 250°C.

These Quick Flange demountable vacuum fittings have a flange size of KF40, NW40 with a glass viewport view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the glass is between 350nm to 1500nm. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. 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 corrosive resistant stainless steel. At present we have the following demountable viewport sizes listed in the graphic below and have replacement viewport glass and O-rings for sale.

These Quick Flange demountable vacuum fittings have a flange size of KF40, NW40 with a Uncoated Quartz Fused Silica viewport view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the Uncoated Quartz is between 200nm to 2000nm. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. 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 corrosive resistant stainless steel. At present we have the following demountable viewport sizes listed in the graphic below and have replacement viewport glass and O-rings for sale.

These KF40 demountable vacuum fittings have a flange size of NW40 with a UV Coated Quartz Fused Silica viewport, view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the Coated Quartz is between 290nm to 370nm. Other coated quartz fused silica is available. Fused silica is for all but the most demanding optical applications. They are preferred over glass viewports because of their transparency to UV ultraviolet radiation. We carry Uncoated and Coated UV viewports and replacement fused silica lenses. See middle graphic chart above for the different light transmissions for each coated fused silica. These vacuum fittings are made of corrosive resistant stainless steel. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. In Europe and Asia, sizes are given by tube inner diameter in millimeters: DN16, DN40, DN63, DN100, DN160, DN200, DN250.

These KF40 demountable vacuum fittings have a flange size of NW40 with a Type A Coated Quartz Fused Silica viewport, view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the Type A Coated Quartz is between 350nm to 700nm. Other coated quartz fused silica is available. Fused silica is for all but the most demanding optical applications. They are preferred over glass viewports because of their transparency to UV ultraviolet radiation. We carry Uncoated and Coated UV viewports and replacement fused silica lenses. See middle graphic chart above for the different light transmissions for each coated fused silica. These vacuum fittings are made of corrosive resistant stainless steel. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. In Europe and Asia, sizes are given by tube inner diameter in millimeters: DN16, DN40, DN63, DN100, DN160, DN200, DN250.

These KF40 demountable vacuum fittings have a flange size of NW40 with a Type B Coated Quartz Fused Silica viewport, view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the Type B Coated Quartz is between 650nm to 1050nm. Other coated quartz fused silica is available. Fused silica is for all but the most demanding optical applications. They are preferred over glass viewports because of their transparency to UV ultraviolet radiation. We carry Uncoated and Coated UV viewports and replacement fused silica lenses. See middle graphic chart above for the different light transmissions for each coated fused silica. These vacuum fittings are made of corrosive resistant stainless steel. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. In Europe and Asia, sizes are given by tube inner diameter in millimeters: DN16, DN40, DN63, DN100, DN160, DN200, DN250.

These KF40 demountable vacuum fittings have a flange size of NW40 with a Type C Coated Quartz Fused Silica viewport, view diameter of 1.19 in and a glass thickness of 0.158". Demountable Viewports are used for ultra-high vacuum applications and molecular spectroscopy. These fittings use a Viton O-ring gasket, operate down to 10-8 torr (10-11 Pa), and have a max bakeout temperature of 150° C. The operable wavelength of the Type C Coated Quartz is between 1050nm to 1620nm. Other coated quartz fused silica is available. Fused silica is for all but the most demanding optical applications. They are preferred over glass viewports because of their transparency to UV ultraviolet radiation. We carry Uncoated and Coated UV viewports and replacement fused silica lenses. See middle graphic chart above for the different light transmissions for each coated fused silica. These vacuum fittings are made of corrosive resistant stainless steel. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½. In Europe and Asia, sizes are given by tube inner diameter in millimeters: DN16, DN40, DN63, DN100, DN160, DN200, DN250.

These Glass Replacement viewports fit our KF-40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.159," No Coating, Max Bake Temperature: 150°C, Operating Wavelength: 350nm~1500nm.

These Quartz (fused silica) Replacement viewports fit our KF40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.158," UNCOATED, Max Bake Temperature: 150°C, Operating Wavelength: 350nm~2000nm.

These Quartz (fused silica) Replacement viewports fit our KF40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.158," UV Coating, Max Bake Temperature: 150°C, Operating Wavelength: 290nm~370nm.

These Quartz (fused silica) Replacement viewports fit our KF40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.158," Type A Coating, Max Bake Temperature: 150°C, Operating Wavelength: 350nm~700nm.

These Quartz (fused silica) Replacement viewports fit our KF40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.158," Type B Coating, Max Bake Temperature: 150°C, Operating Wavelength: 650nm~1050nm.

These Quartz (fused silica) Replacement viewports fit our KF40 Demountable Viewports. View diameter of 1.19". Glass Thickness 0.158," Type C Coating, Max Bake Temperature: 150°C, Operating Wavelength: 1050nm~1620nm.

Viton Replacement O-Ring for Demountable Viewports. KF40, View Diameter 1.19 in., Bakeable up to 150°C.

Kalrez 4079 Replacement O-Ring for Demountable Viewports. KF40., View Diameter 1.19 in., Bakeable up to 250°C.