Glass weld-on level gauges, also known as sight glasses or sight level gauges, are devices used to visually monitor the level of liquids or fluidized solids in tanks, vessels, or pipelines. They are designed to be permanently welded onto the walls of the container or pipe, providing a transparent viewing window for easy observation of the fluid level.
Here are some key features and components of glass weld-on level gauges:
- Glass Tube: The main component of a glass weld-on level gauge is a transparent glass tube that serves as the viewing window. It is usually made of borosilicate glass, which is resistant to thermal expansion and chemical corrosion.
- Protective Housing: The glass tube is typically housed within a protective metal or plastic frame or housing. This enclosure provides structural support and protects the glass tube from mechanical damage or external impacts.
- Welding Connection: Glass weld-on level gauges are specifically designed for installation by welding onto the container or pipe. The housing of the gauge is welded directly onto the wall, ensuring a secure and leak-proof attachment.
- Fluid Inlet and Outlet Connections: The gauge housing is equipped with inlet and outlet connections that allow the liquid or gas to enter and exit the glass tube. These connections are usually threaded or flanged to facilitate the integration of the gauge into the system.
- Graduations and Markings: To provide accurate level readings, the glass tube is often marked with graduations or markings at regular intervals. These markings help in determining the precise level of the fluid within the gauge.
- Gaskets and Seals: Gaskets or seals are used to ensure a tight and secure connection between the gauge housing and the container or pipe. These seals prevent any leakage or seepage of the fluid being monitored.
Glass weld-on level gauges are commonly used in various industries, including chemical processing, pharmaceuticals, oil and gas, food and beverage, and water treatment. They offer a reliable and straightforward method for visually monitoring fluid levels in a wide range of applications. However, it’s important to consider the compatibility of the glass material with the specific fluid being measured to ensure chemical resistance and durability. Regular maintenance and inspection of the gauge are also recommended to ensure proper functioning and to address any potential issues, such as glass clouding or coating.