Shanghai Longway Special Glass Co., Ltd.
| Payment Terms | D/P,T/T,Western Union |
| Supply Ability | 5000 Pieces per Month |
| Packaging Details | electrolytic capacitor paper,foam,carton |
| Shape | Flat or Rectangular |
| Surface | Optical grade |
| Transmission | >90% for visible light |
| Coating | Available |
| Processing | Tempering and Polishing |
| OEM | Available |
| Brand Name | LONGWAY |
| Model Number | QB01245353 |
| Certification | ISO9001 |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | D/P,T/T,Western Union | Supply Ability | 5000 Pieces per Month |
| Packaging Details | electrolytic capacitor paper,foam,carton | Shape | Flat or Rectangular |
| Surface | Optical grade | Transmission | >90% for visible light |
| Coating | Available | Processing | Tempering and Polishing |
| OEM | Available | Brand Name | LONGWAY |
| Model Number | QB01245353 | Certification | ISO9001 |
| Place of Origin | Shanghai, China | ||
| High Light | Tempered Level Gauge Sight Glass ，High Temp Industrial Tanks Sight Glass ，Borosilicate Level Gauge Sight Glass | ||
Tempered Borosilicate Level Gauge Sight Glass for High-Temp Industrial Tanks
Material Composition
Primary Material: Borosilicate glass (commonly Borosilicate 3.3 per ISO 3585 standards).
Tempering Process: Chemically or thermally strengthened to enhance durability.
Key Additives: Silicon dioxide (80-85%), boron trioxide (10-13%), and trace alkaline earth metals.
Key Properties
Thermal Resistance: Withstands temperatures up to 450°C (842°F) and thermal shocks from ΔT 160–200°C.
Mechanical Strength: Tempering increases impact resistance (4–5x stronger than annealed glass).
Chemical Durability: Resists corrosion from acids, alkalis, and solvents (pH 0–14).
Optical Clarity: Maintains transparency under extreme conditions for accurate visual monitoring.
Primary Function
Level Monitoring: Provides a clear visual interface to inspect liquid/gas levels in high-temperature industrial tanks.
Pressure Tolerance: Operates safely in systems with pressures up to 10–15 bar (varies by thickness).
Safety Barrier: Acts as a leak-proof window, isolating internal tank conditions from external environments.
Applications
Chemical Processing Tanks: For aggressive acids, molten salts, or hot solvents.
Power Generation: Boilers, steam systems, and thermal oil reservoirs.
Oil & Gas: Refinery storage tanks, high-temp reactors, and LNG processing.
Pharmaceuticals: Sterilization autoclaves and reactors requiring hygienic visibility.
Advantages Over Alternatives
Longevity: Outlasts soda-lime glass or polycarbonate in cyclic thermal environments.
Safety: Tempered design minimizes fragmentation risks if damaged.
Low Maintenance: Resists clouding, scaling, or chemical etching.
Industry Standards
Complies with ASTM E438, ISO 3585, and DIN 7080 for high-temp applications.
| Item | Glass disc, Glass wafer, Glass substrate, Sight glass |
| Material | borosilicate glass, Float glass, borofloat |
| Diameter Tolerance | +0/-0.2 mm |
| Thickness Tolerance | +/-0.2 mm |
| Processed | By Cutting,Grinding,Tempering, Polishing |
| Working temperature | Resisting high temperature shock |
| Surface Quality | 80/50,60/40 |
| Material Quality | No scratches and air bubble |
| Transmission | >90% for visible light |
| Chamfer | 0.1-0.3 mm x 45 degree |
| Surface Coating | Available |
| Usage | Photography, Optics, Lighting system, industrial area. |
Company Details
Business Type:
Manufacturer,Agent,Exporter,Trading Company,Seller
Year Established:
2008
Total Annual:
1000000-5000000
Employee Number:
30~100
Ecer Certification：
Verified Supplier
**Introduction** Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted par... **Introduction** Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted par...
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