A sight glass is a glass disk that’s securely held by bolts and gaskets between two metal frames. It is installed in an enclosed system like a vacuum homogenizer that allows an observer to view what is happening inside the container, ensuring optimal quality and safety.
The merit of sight glasses is that they make process observation possible without disrupting the environment within.
Sight glasses can serve several functions aside from basic viewing, but this is the most common use.
While “sight glass” is a general, overarching term, there are several more specific terms that refer to different types of sight glasses. Now, let’s check the most common types of sight glasses and Teclumos products for each category.
Sight Glass Fittings
• Container Sight Glasses
• Level Indicator Sight Glasses
Container Sight Glasses
These sight glasses are best in industries like cosmetics and food processing, which use storage tanks or containment systems designed to mix or ferment.
Container sight glasses are welded onto the vessel wall for viewing the internals of enclosed systems to ensure the system is functioning properly.
Teclumos Screwed Sight Glass Fitting SD
• Screwed sight glass fitting for welding into or onto container wall
• Similar to DIN 11851
• Pressure: Max. 6 bar
• Complete with gaskets, glass disc, and Grooved collar nut
• It can be combined with Teclumos SKD light glasses.
• Vacuum
• Nominal sizes: DN 25 to DN 150
• Viewing diameter: 25 to 150 mm
• Materials: AISI 304 L stainless steel or alternative
Teclumos Circular Sight Glass Fitting CSD
CSD sight glasses are circular flanged ports for welding onto the container wall.
• Nominal Pressure: 6 / 10 / 16 bar
• DIN 28120 or similar
• Vacuum
• Complete with gaskets, glass disc and stud/bolts
• Nominal sizes: DN 50 to DN 150
• Viewing diameter: 80 to 175 mm
• Materials: Steel RSt 37-2, AISI 316 and specials
Teclumos Circular Sight Glass Fitting CSR
These Teclumos sight glasses are circular flanged ports for welding onto the low-pressurized container wall. To get a model suitable for installing light glasses, please contact Teclumos.
• similar to DIN 28120
• Nominal Pressure: 0/2.5 bar
• Smaller outer diameter, lower weight, lower cost, more comfortable to clean
• Complete with gaskets, glass discs, and screws
• Nominal sizes: DN 50 to DN 150
• Viewing diameter: 80 to 175 mm
• Materials: Steel RSt 37-2, AISI 316, and specials
Level Indicator Sight Glasses
These sight glasses are mostly used when we want to check the liquid level inside our system. In fact, level indicators have two functions: first, allowing us to observe the interior of silos and storage tanks, to ensure optimal quality and safety. Second, level measurement.
Teclumos Rectangular Sight Glass Fitting
• Rectangular level indicator for welding onto the vessel wall
• Nominal pressure: 16 bar
• Operating temperatures:
100 °C max. with sodium silicate glass to DIN 8903
243 °C max. with borosilicate glass to DIN 7081
• complete with the appropriate seals, glass
plates, and cover fastenings
• Vacuum
• Sizes: 250 to 800 mm long, 70 mm wide
• Viewing width: 18 mm
• Materials: AISI 316 stainless steel or alternative
Teclumos Oval Sight Glass Fitting
• Oval level indicator for welding onto the vessel wall
• Nominal pressure: 2,5 / 6 / 10 / 25 bar
• Operating temperatures:
100 °C max. with sodium silicate glass to DIN 8903
243 °C max. with borosilicate glass to DIN 7081
• complete with the appropriate seals, glass
plates, and cover fastenings
• Vacuum
• Sizes: 186 to 791 mm long, 80 to 116 mm wide
• Viewing width: 15 to 50 mm
• Materials: AISI 316 stainless steel or alternative
