Sight glass — material borosilicate glass, model number VT-02. The complete factory specification follows. Made by Qingdao Vatti Glass Co., Ltd. (11 years on the platform, factory-assessed). Quantity and destination market determine the final price — tell us both for a firm quote.
Key Features of This Sight Glass
- Model Number: VT-02
- Material: borosilicate glass
- Warranty: 2 Years
- Place Of Origin: Shandong, China
- Application: Workshop, Exterior, Outdoor
- Feature: high pressure resistant
Technical Specifications
| Usage | Industrial |
|---|---|
| Thickness | 17mm, 21mm |
| Application | Workshop, Exterior, Outdoor |
| Shape | Flat |
| Structure | Solid |
| Warranty | 2 Years |
| After-Sale Service | Online Technical Support |
| Project Solution Capability | graphic design |
| Place Of Origin | Shandong, China |
| Brand Name | Vatti |
| Model Number | VT-02 |
| Color | Transparent, clear |
| Size | Custom Sizes |
| Material | borosilicate glass |
| Feature | high pressure resistant |
| Working Temperature | 260 ~ 550 ℃ |
| Packaging Details | White paper box for each piece, 50 pieces in one carton, or as customer`s requirements. |
| Port Of Dispatch | QINGDAO |
| Selling Units | Single item |
| Single Package Size | 30X20X10 cm |
| Single Gross Weight | 1.0 kg |
| Supply Ability | 100000 pieces per Month level gauge glass |
Product Details


Factory Direct Marine Boiler Parts Klinger Level Gauge Sight Glass








Product Name | Level gauge glass |
Material | Aluminosilicate glass,borosilicate glass |
Color | Transparent |
Density | 2.62-2.67g/cm3 |
Transmissivity | 91.8%(8mm), 91.9%(1mm) |
Hardness | >7 |
Tensile strength | 4.8x107pa(N/M2) |
Compressive strength | (0-300) 3.3±0.1×10-6K-1 |
Poisson's ratio | 0.18 |
Coefficient of thermal expansion | (0-300) 3.3±0.1×10-6K-1 |
Thermal conductivity | 1.2W·m-1·k-1 |
Softening point | 820±10°C |
Annealing point | 560°C |
Strain point | 516±10°C |
Electrical resistivity | >1018 Ωm |
Dielectric constant | 4.6 1 MHz, 25 |












7) Matched gaskets available: non asbestos gasket, graphite gasket and mica gasket.










gas/air filled area which appears bright.






































Packing
1. White paper box for each piece, 50 pieces in one carton, or as customer`s requirements.
2. Wooden crates worthy for ocean and land carriage.
Shipping
1. 30% deposit and 70% before shipping, FOB Qingdao Port.
2. Sample Order and small order will ship by DHL, TNT, FEDEX, EMS and UPS. It will take 7-10 working days since payment arrived.


























Advantage of us
1. 16 years experiences on glass manufacturing and exporting.
2. Top quality glass with CE, CCC certificate, exporting to more than 80 countries in the world.
3. Unique designed strong wooden cases, solving the problems of breakage.
4. Dockside warehouses beside three of China main container seaports, ensuring convenient loading and rapid delivery.
5. Full range of flat glass supply, offering one-stop purchase.
6. Professional sales team, offering personalized and dedicated services.


Ordering and Pricing
- Minimum order quantity: 10 piece
- Volume pricing:
- 10–49 piece: US $10.98 / piece
- 50–99 piece: US $6.98 / piece
- 100+ piece: US $2.98 / piece
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this sight glass?
The standard minimum order quantity is 10 piece. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
What warranty is provided?
The manufacturer provides a 2 Years warranty. Spare parts and technical support remain available after the warranty period.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Qingdao Vatti Glass Co., Ltd., based in China. The company 11 years as a verified Alibaba.com supplier, operates its own manufacturing, passed third-party supplier assessment. Browse the full Qingdao Vatti Glass Co., Ltd. range on HVACR Nexus.
See more in Boiler Parts on HVACR Nexus.





















