1Precautions for glass tube sight glass:

•Mirrors are flow reaction devices used to observe liquids, gases, vapors, and other media, and their window glass should be kept clean and dust-free;

•Window glass is a vulnerable component, so be careful when installing the mirror. The mirror base should be flat and smooth, and the sealing gasket between the lens and the mirror base should be installed flat without damage or grease. Before tightening the screws, ensure that the mirror base and cover are installed correctly, and then slowly tighten the screws diagonally;

•Glass has certain limitations in temperature and pressure resistance. Please strictly follow the instructions in the manual;

•Allowing sudden temperature changes below 60 ℃, glass may break due to excessive temperature differences.

2、 Selection instructions for glass tube sight glass:

3、 Comprehensive parameters of glass tube sight glass:
• Main material: A3、304、304L、316、316L、 Fiberglass reinforced plastic, lining;
• Window materials: tempered borosilicate glass, high borosilicate glass, quartz glass;
• Nut bolt: A3、304、304L、316、316L；
• Sealing gaskets: Nitrile rubber gasket, PTFE gasket, high-temperature resistant PTFE gasket, metal gasket, graphite gasket;
• Sealing surface: protruding surface (RF), flat surface (FF) Concave convex surface (MFM), tenon groove surface (TG);
• Connection methods: flange connection, internal thread connection, external thread connection, butt welding connection, clamp connection;
• Flange standard: HG20592-97、GB、SH、HGI、JB、ANSI、JIS；
• Manufacturing and testing standards: HGJ501-502-86、HG/T21575-94、HGS07；
• Working temperature: Carbon steel: -30 ℃~+350 ℃, Stainless steel:- 80℃ ~ +480℃；
• Glass temperature resistance: tempered borosilicate glass: ≤ 280 ℃, high borosilicate glass: ≤ 450 ℃, quartz glass: ≤ 850 ℃, allowable sudden change temperature ＜ 60 ℃;
• Glass pressure resistance: tempered borosilicate glass sheet: ≤ 3.0MPa, quartz glass sheet: ≤ 5.0MPa, glass cylinder: ＜ 0.6MPa ；
• Exterior paint: carbon steel: anti-corrosion paint, stainless steel: acid pickling or polishing treatment.

4、 Ordering instructions:
Please specify detailed parameters such as product name, nominal diameter, pressure rating, material, flange standard, etc. when placing an order. The above product parameters are for reference only. Our company can order processing according to user requirements. Please feel free to call or write to us.