BL901-1 Welded Tank-Top Sight Glass Light
The Borlan Fluid BL901-1 welded tank-top sight glass light combines a vessel-top viewing point with local battery-powered illumination. The 2025 catalog lists a flared-mouth weld-style connection and an optional union-mouth version. Catalog power: 4.5 V, 3 W. Send your vessel drawing and installation requirements for a connection and approval-scope review.
BL901-1 welded tank-top sight glass light brings a viewing point and local illumination together at the top of a process vessel. Its battery-powered lamp avoids a permanent power cable at the observation point. The product views below show the weld-style connection; Borlan Fluid can review a union-mouth option against your vessel drawing.
Built for tank-top observation
- Local light at the viewing point: the BL901-1 lamp is listed in the Borlan catalog as a 4.5 V, 3 W battery-powered model.
- Weld-style connection: intended for a vessel-top installation designed around the matching connection detail.
- Connection review: the catalog also notes a union-mouth option. Confirm the required opening and mating part before ordering.
- Drawing-led selection: send your nozzle and installation drawing so Borlan Fluid can check the connection, viewing arrangement and supply scope.
Catalog reference dimensions
The 2025 Borlan catalog shows two connection rows for this weld-style product: a flared mouth in the first row and an optional union mouth in the second. The values below follow those rows exactly. All dimensions are in millimeters; a blank catalog field is shown as “—”. Use the approved project drawing for fabrication.
| Connection | Size | DN | D1 | D2 | D3 | H | L | L1 |
|---|---|---|---|---|---|---|---|---|
| Flared mouth | Ø63 | — | 63 | 27 | 70 | 152 | 37 | 21 |
| Union mouth option | — | 40 | 45 | 27 | 70 | 152 | 37 | 21 |
Power and approval scope
The BL901-1 light certificate we hold identifies a DC 4.5 V, 3 W configuration powered by three 1.5 V AAA alkaline cells. Approval details must be checked against the exact lamp, connection assembly and intended installation. Do not assume that rechargeable cells, a different power source or another assembly are covered by that certificate. Request the current certificate and approved drawing for any hazardous-area project.
What to send with your inquiry
Tell us the vessel opening and mating dimensions, whether you need the catalog flared mouth or union-mouth option, the process and cleaning conditions, and your project documentation requirements. Borlan Fluid can then review the fit and prepare a model-specific quotation. For product and application videos, visit the official Borlan Fluid YouTube channel.
Borlan Fluid can help you throughout the design, sample, production, pack & supply.Borlan Fluid has its own design team which is able to deliver design services for Stainless Steel Tank Accessories.We will send you sample for the brochure after confirmed details.We can also offer you 3D model of our stock product.
Stock sample can send out within 1 day, custom sample doing time is 5-10 days. 1~100pcs
production time is 7~10 days, 500~1000pcs production time is 10~15 days. 1000~3000pcs
production time is 15~20 days.
a).You send us artwork.
b).You pay 30% deposit, if less than 100pcs, we suggest you pay full amount because production time will be quick (7~10 days).
c).We make a digital print proof sample take picture and video for you confirmation.
d).Start production.
e).Balance Paying before package sending out.
We are a professional manufacturer specializing in stainless steel sight glasses, sight glass lights, and tank accessories.
All products are designed and manufactured in our own factory, allowing us to control quality, lead time, and customization.
We supply a full range of stainless steel tank and pipeline accessories, including:
Sight glasses (union, flanged, pipe, fused, tubular)
Sight glass lights (integrated and separate types)
Explosion-proof sight glass lights
Manways and manholes
Spray balls and cleaning accessories
Sanitary fittings and customized tank accessories
Our standard materials include:
304 stainless steel
316 / 316L stainless steel
Other materials can be provided upon request depending on application requirements.
Yes.
All sight glass lights are CE certified, and comply with relevant CE conformity requirements.
Explosion-proof models can additionally comply with ATEX requirements when specified.
Yes.
We provide explosion-proof sight glass lights suitable for hazardous environments such as chemical, pharmaceutical, and petrochemical industries.
Please inform us of the required explosion-proof standard (e.g. ATEX、EX) when making an inquiry.
Yes.
Custom sizes and non-standard dimensions are available upon request.
We can customize:
Diameter and thickness
Connection types (flanged, clamp, welded, union)
Glass type
Lighting configuration
Available connection types include:
Flanged (DIN / ANSI / customized)
Union
Tri-clamp (sanitary)
Welded
Pipe inline connections
Our products are widely used in:
Chemical processing
Pharmaceutical manufacturing
Food & beverage
Biotechnology
Cosmetics
Environmental and water treatment industries
Yes.
We supply separate sight glass lights designed for external illumination of existing sight glasses.
Integrated and separate configurations are both available.
Depending on the model, we offer:
AC power supply
DC power supply
Battery-powered models
Voltage, wattage, and cable length can be customized.
Yes.
We supply sanitary stainless steel sight glasses and accessories, suitable for hygienic applications in food, beverage, and pharmaceutical industries.
All products undergo:
Material inspection
Dimensional inspection
Functional testing
Certification verification (CE where applicable)
This ensures consistent quality and reliability.
Lead time depends on:
Product type
Quantity
Customization requirements
Standard products usually have shorter lead times, while customized products may require additional production time.
Yes.
We support OEM and customized branding for overseas customers, including product marking and packaging.
You can contact us by:
Website inquiry form
Providing drawings or specifications if customization is required
Our sales team will respond with technical confirmation and quotation.
Request A Quote
To know more about our products and services, please fill out the contact form.
Contact Us
We are committed to producing the best quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.
jzxiang1992@gmail.com
Phone
+86-16657273263
+8616657273263
borlanfluid
Address
longwan town, wenzhou city,zhejiang province, China.
