زجاج رؤية مدمج ذو حافة مع ضوء BL901-1

زجاج رؤية مدمج ذو حافة مع ضوء BL901-1

The BL901-1 integrated flanged sight glass with light places a battery-powered inspection lamp beside the viewing area in one flanged assembly. It gives operators a defined observation point on a tank or vessel when a permanent power cable is inconvenient. The photograph shows the lamp mounted on the bolted stainless steel window. This page covers that integrated flange form, rather than the separate BL901-1 bracket spotlight or the union-connected assembly.

Where This Design Fits

The 2025 Borlan Fluid catalog identifies this version as an integrated flanged sight glass light with a welded vessel connection. The lamp and viewing window are arranged together, so the installation can be specified as one inspection location. Battery power may suit a vessel where routing a continuous external supply is impractical, provided the operating and inspection schedule matches the selected battery configuration. For an existing window that only needs a separate lamp, consider the BL901-1 bracket-mounted sight glass spotlight.

• Catalog family: BL901-1 battery-powered sight-light series.
• Catalog reference: 4.5 V and 3 W for the illustrated family configuration, using three batteries. Confirm the exact supplied battery type and lamp construction.
• اتصال: integrated flange assembly with a welded vessel connection in the catalog; verify the mating detail on an approved drawing.
• Flange choices: the catalog mentions several pressure-class arrangements, but the exact ordered class and the complete assembly rating need an approved drawing.

Catalog Reference Dimensions

The following drawing and table reproduce the BL901-1 integrated flanged dimension set from the 2025 catalog. Dimensions are in millimeters. In the drawing, D is the overall flange diameter, L1 and L2 are the marked section dimensions, and H is the lamp height above the flange reference. The catalog selection chart says DN80-DN200 for this form, while its detailed dimension table also prints DN50, DN65 and DN250 and omits DN200. Please treat these as drawing references, not guaranteed stocked sizes; confirm availability and the approved drawing for the requested DN.

Catalog dimensions are preliminary. Weld preparation, bolt arrangement, glass, gasket, wetted material and final assembly ratings require a configuration-specific drawing and quotation.

Battery and Certification Scope

For the BL901-1 DC 4.5 V, 3 W sight-light sample, Borlan Fluid holds Chinese explosion-proof certificate CLEx24.3249. The certificate identifies three 1.5 V AAA alkaline cells in series, Ex ib IIC T4 Gb / Ex ib IIIC T130°C Db markings and IP65 enclosure protection. It also prohibits charging, replacing or disassembling the batteries in a hazardous area. The certificate applies only to products matching the tested construction; a rechargeable-cell option, changed lamp or complete flange-and-window assembly must not be assumed to share that approval. Request the current certificate and configuration drawing when hazardous-area documentation is needed.

The catalog does not establish a universal pressure, temperature, vacuum or hygienic rating for every BL901-1 flanged assembly. Select the glass, seal, metal grade and connection according to the medium, cleaning method and vessel design. Borlan Fluid can review the proposed build and identify the documents needed for your project.

الأسئلة الشائعة

Is this a separate battery spotlight?

No. This page shows the battery lamp mounted on an integrated flanged viewing-window assembly. The bracket spotlight is a separate lamp for use beside a compatible existing window.

Which DN sizes are available?

The catalog drawing lists DN50, DN65, DN80, DN100, DN125, DN150 and DN250 dimensions, but the series selection chart gives a different size range. Tell us your required DN and connection so the available build and drawing can be confirmed. No DN200 dimensions are printed in this drawing.

Can rechargeable batteries be used in a hazardous area?

Do not infer this from the family catalog. The cited explosion-proof certificate specifies three AAA alkaline cells for its tested sample and prohibits battery handling in a hazardous area. Ask for documentation covering the exact configuration and site requirements.

Request a Configuration-Specific Quote

Send the required DN, vessel opening and mating drawing, quantity, medium, pressure and temperature, glass and seal preference, metal grade, battery specification, inspection duty and any hazardous-area requirements. Contact Borlan Fluid for a reviewed BL901-1 integrated flanged sight glass with light proposal. If a removable union connection better suits the vessel, compare the BL901-1 integrated union sight glass light. For product demonstrations, visit the official Borlan Fluid YouTube channel and check that the video shows your intended configuration.