19mm Round Borosilicate Glass 171.45mm and 152.4mm diameter
Borosilicate Glass for circular sight glasses or tubular sight glasses Borosilicate glass is a kind of glass with silica and boron trioxide as the main glass-forming element. Borosilicate glasses become famous for having very low coefficients of thermal expansion, making them more resistant to thermal shock than soda-lime glass. borosilicate glass is fit to be used in sight glass lens, Borosilicate glass is ultra and clear glass with good thermal and chemical properties and outstanding transparent Parameters Dimensions(mm): 1200×600 ,1150×850 ,1150×1700.(other size upon request) Available thickness(mm): 1mm-25mm,we also can offer it if you want more thickness. Density (g/㎝3 ) (at 25℃): 2.23±0.02 Co-efficient of expansion(α)(20-300℃): 3.3±0.1×10-6 Softening point(℃): 820±10 Identical temperature difference(K): 100 >300(Strengthening type) Maximum working temperature(℃): =450 Refractive(nd ) : 1.47384 Light transmission: 92%（thickness≤4mm;91%(thickness≥5mm) Application Circular sight glass lens Tubular borosilicate glass Appliance glass such as furnace, microwave, gas stove etc. Industry Glass such as sight glass, linings, etc. Lighting equipment (protective glass for high-power spotlights and other lamps) Photovoltaic module Optical filters Primary material for fully tempered glass Main properties High temperature stability Good surface quality Outstanding transparency in the visible, UV and IR ranges Can be tempered High chemical resistance Environmental engineering and chemical engineering (lining layer of repellence, autoclave of chemical reaction and safety spectacles); Our circular sight glass is required in all areas where the visual inspection of processes in vessels has to be ensured under pressure, at high temperatures or on exposure to chemicals. These sight glasses is made mainly from borosilicate glass, we also produce sight glass lens with alumino-silicate glass or quartz glass or sapphire glass Read the full article