The sight glass products produced by our company meet the industry standards, and have the advantages of good transparency, beautiful appearance, accurate tolerance, pressure and temperature resistance, explosion-proof and crack-proof, etc. They are widely used in metallurgy, chemical industry, coal, heavy industry, shipbuilding, light industry and other fields .

The sight glass with neck is also known as the pressure vessel sight glass. The difference from the conventional equipment sight glass is that there is an extra tube at the bottom of the sight glass, which is what we call the "neck". Its function is to separate the sealing of the sight glass from the welding port. It is open to minimize the impact of welding stress on the sealing surface of the sight glass. [1] The "neck" with neck sight glass is also divided into standard type and non-standard type.