Sight Glass Types

1, Circular Sight Window also named Boiler Sight Glass, Pressure Vessel glass Sight Glasses: this kind of sight glass is mainly used for all kinds of observation holes, relatively small size, shape is usually round, square, thickness of 2-50mm, used in all kinds of chemical, pressure vessel, power, medicine, boiler as an observation window. 

2,Sight Flow Indicator also named Pipeline Sight Glass, mainly used for acid and alkali concentration is relatively high, temperature change is relatively large, the requirements of glass has good pressure resistance, heat shock ability, generally used in high pressure vessels, petroleum, chemical, nuclear power plants and other glass mirror requirements are higher. 

3, Level Gauge Sight Glass: used for all kinds of liquid level or oil level observation, mainly plain type, trough type level gauge glass, prism glass, two-color water level gauge glass, working temperature: 200-1200, temperature depends on the material: working pressure: 1-30mpa.  Pressure depends on material, thickness and specification. 

4, Full-View Sight Glass also named Glass Tube Sight Glass: high temperature glass tube is widely used in medical equipment, water treatment, food sanitation, chemical pipeline, lamp manufacturing, etc., because this series of products have strong compressive resistance, good thermal stability, corrosion resistance, high light transmission, conventional thickness: 1-10mm, conventional outer diameter: 15-200mm, temperature resistance:  500, 1500, the length can be cut according to customer requirements. 


Sight glasses find application in a broad spectrum of industries:

Utilities and energy


Wastewater treatment and management



Food and beverage processing

Within these industries, they are used in a variety of equipment and systems:

Oil and gas refineries

Automobiles and other transport vehicles

Combustion equipment

Fluid handling systems

Boiler systems

Industrial burners

Pulp and paper processors

Our products of high temperature resistant sight glass and high pressure resistant vessel glass,liquid level gauge mica components are fit to standard DIN28120, DIN28121, DIN7080, DIN8902, DIN8903, GB/T23259, JC/T891-2016

Our products of pressure resistant sight glass,super pressure and alkali resistant sight glass,high pressure level guage sight glass,high temperature and high pressure pipeline sight glass, sintered sight glass are fit to standard NB/T47017DIN28120DIN28121ANSI B16.5

We supply the solved solution for the special glass and industrial sight glass in the application of nuclear power, military industry, shipbuilding, papermaking, deep-sea exploration equipment, pressure vessel, ultrahigh pressure extraction plant, petroleum, petrochemical, Marine engineering equipment, ships, thermal power, thermal power, laboratory in universities, military police protection and so on.