Welded Flange Sight Glass, also known as flow indicator, is a device generally welded directly onto a tank or other liquid containing vessel, and allows visual observation of level, color, or clarity of a liquid in a vessel or tank. it consists of a piece of glass sandwiched between two metal flanges and two sealing gaskets. It is one of main accessories used on industrial pipeline installations.
Standard Welded Flange Sight Glass units are furnished with a flat bottom. Upon request, the unit can be machined with a cylindrical radius to match the contour of the vessel. The Sight Glass are available in single or multiple section types.
Product Features
High corrosion resistance, aesthetic appearance
Effective in most operating environments
Easy to install and repair
A longer service life
| Specification of Welded Flange Sight Glass | |
| Operating Pressure | 0.2–1 MPa |
| Operating Temperature | -20 °C to +250 °C |
| Chamber Material | Carbon steel; Stainless steel 304 or 316, Titaniumor alternative |
| Gauge Glass Material | Borosilicate glass, Quartz glass |
| Sealing Gaskets | NBR gasket; Graphite composite gasket; PTFE gasket |
| Way of Observation | Visual inspection |
| Way of Connection | Welding |
| Notes: Other specifications available upon request. | |
