زجاج رؤية متكامل مع ضوء BL901-1

BL901-1 Battery-Powered Integrated Union Sight Glass with Light

The BL901-1 integrated union sight glass with light brings a battery-powered inspection lamp and a union-mounted observation window together at one process viewing point. It is a practical option when operators need to inspect a vessel or pipeline interior and an external lamp supply is inconvenient. This page refers to the BL901-1 union assembly in the Borlan Fluid catalog; BL901-1 tank-top lights, flange lights and separate spotlights use different mounting drawings.

What Does the BL901-1 Union Assembly Include?

The catalog shows a compact lamp mounted beside the viewing area of a stainless-steel union sight glass. The catalog reference for the BL901-1 light is 3 W at DC 4.5 V, supplied by three AAA-size cells, without an external power connection. The catalog also lists a push-button and mentions a possible wiper from DN80 upward. Battery type, wiper fit and the actual supplied assembly should be confirmed against the order drawing.

• Product type: integrated union sight glass with battery-powered inspection light.
• Catalog sizes: DN50, DN65, DN80, DN100, DN125, DN150, DN200 and SMS76.
• Light reference: 3 W, DC 4.5 V, three AAA-size cells; confirm the ordered battery specification.
• Wiper option: discuss availability from DN80 upward and confirm against the selected design.

BL901-1 Union Sight Glass Dimensions

The drawing and values below come from the BL901-1 integrated union sight glass light section of Borlan Fluid’s 2025 catalog. All dimensions are in millimeters. They do not describe the BL901-1 tank-top, flange or spotlight variants. For DN50, the catalog prints D1 as 54/57; select the required interface against an approved drawing rather than treating the two values as interchangeable.

Catalog reference dimensions only. Confirm the mating connection, wetted materials, seal, glass, pressure, temperature and approved drawing for the final application.

Battery, Hazardous-Area and Process Selection

Specify the installation point, connection standard, required viewing area, ambient conditions, process medium and cleaning method. The union size and lamp must be selected together. For hazardous-area projects, request the certificate and approved configuration for the exact lamp and assembly being ordered. The available BL901-1 certificate covers a tested DC 4.5 V / 3 W lamp sample with three 1.5 V AAA alkaline batteries; its IP65 result and explosion-protection marking should not be applied automatically to every battery option or union assembly. The certificate prohibits charging, battery replacement and disassembly in a hazardous area. Catalog references to rechargeable cells or IP66 do not by themselves expand that tested scope.

Pressure, temperature, vacuum, glass type, gasket material, corrosion resistance and cleaning compatibility are configuration-dependent. Borlan Fluid can review these conditions with your equipment drawing and quote a matching assembly and documentation package.

الأسئلة الشائعة

Is this the same as a BL901-1 tank-top light?

No. This page describes the union sight glass with the lamp built into its inspection point. Tank-top, flange and separate spotlight versions have different interfaces and dimensions.

Can the BL901-1 union sight glass include a wiper?

The catalog notes a possible wiper from DN80 upward. Share the selected size, process conditions and mounting drawing so the compatible version can be confirmed.

Can rechargeable AAA cells be used in an explosion-proof installation?

Do not infer that from the catalog option. The certificate examined an alkaline-cell sample. Request approval for the exact battery and lamp configuration before hazardous-area use, and follow the certificate’s operating restrictions.

Request a Size-Specific Quote

Send the required DN or SMS size, connection drawing, quantity, process medium, pressure and temperature, material and seal requirements, battery specification, wiper need and any hazardous-area documentation requirement. Contact Borlan Fluid for a reviewed BL901-1 union sight glass light proposal. If your installation has an external supply, compare the BL401-3 wired integrated union sight glass light. For product footage, visit the official Borlan Fluid YouTube channel and confirm that the video shows the configuration you need.