What Types of Sight Glasses are in Fanovo ? Fanovo supply a wide range of sight glasses for viewing the contents and/or level of tanks, vessels or pipelines. Methods of installation are by welding, bolting or clamping into your equipment. Pressure ratings range from high vacuum, through atmospheric to high pressure applications. Temperature ratings range for cryogenic to furnace. Sizes range from 6 mm through to 600 mm. Materials available include aluminium, carbon steels, stainless steels, duplex stainless steels and hastelloy. Circular sight glass fittings A sight glass, also called a sight window or view port, comprises two flanges, bolted together, surrounding a glass disc sealed with gaskets and provides a means of viewing the inside of a process vessel or tank. Typically used to visually verify stages of a process, inspect process media, and to observe liquid levels. Common applications include the viewing of internals of pressure vessels, tanks, silos, stirred vessels, separators pipelines etc. In addition to the sight glasses, Fanovo can also supply accessories such as a wiper, sight glass Luminaires, cameras and spare glass and gaskets. Sight flow indicators A sight flow indicator is used in process pipelines to observe the flow of liquid, powder or gas. It is comprised of a body with one or more viewing windows. It is the most reliable way to verify flow for direction and approximate rate, colour and clarity.