Description
Double Window Sight Glass Manufacturer & Exporter in India
FlowBiz Double Window Sight Glasses (also known as Dual Window Sight Flow Indicators) are heavy-duty, inline visual inspection devices engineered for continuous, real-time monitoring of fluid flow, clarity, color, and phase changes in industrial process lines. Featuring two high-strength glass ports aligned directly opposite each other on a rigid metal housing, this dual-port design allows natural or external ambient light to pass straight through the fluid stream. This completely eliminates internal shadows and blind spots, allowing operators to easily inspect media movement even in dark or high-density piping setups.
Core Mechanical Features & Opposing-Port Engineering
- Dual-Window Backlit Visibility: Positioned opposite each other, the two transparent glass ports act as a pass-through viewing channel, making micro-bubbles, particulate contamination, and liquid-gas interface changes instantly visible.
- High-Strength Toughened Glass: Fitted with heavy-duty, heat-treated Borosilicate Glass 3.3 windows that resist extreme thermal shocks, caustic boiler additives, and continuous steam line pressure without clouding or etching.
- Optional Internal Flow Indicators: Can be equipped with internal drip tubes, hinged flappers, or rotary wheels to make subtle or low-velocity clear fluid movement easily recognizable from a distance.
- Leak-Tight Body Sealing: High-integrity PTFE, Grafoil, or spiral-wound graphite gaskets cushion the glass-to-body joint, preventing localized stress concentrations and ensuring zero leakage under high-pressure line surges.
Technical Specifications & Standards
Specification Parameter | Standard Engineering Range |
Nominal Sizes | 1/2" (DN15) to 8" (DN200) / Higher sizes up to 16" on request |
Pressure Class / Rating | ASME Class 150, Class 300 / PN16 to PN40 |
Body Metallurgy (MOC) | Cast Steel (WCB), Stainless Steel (SS304, SS316, SS316L), Forged Carbon Steel |
Glass Window Type | High-Grade Toughened / Annealed Borosilicate Glass 3.3 (DIN 7080) |
Gasket Materials | Virgin PTFE, Grafoil, Compressed Non-Asbestos (CNAF), Viton |
End Connections | Flanged Ends (ASME B16.5 / DIN), Screwed Female (NPT/BSP), Socket Weld |
Design & Pressure Standards | Manufactured per ASME B16.34; Pressure tested to API 598 |
Target Industrial Applications
FlowBiz Double Window Sight Glasses are widely deployed downstream of steam traps to diagnose steam blowing faults, in boiler condensate return lines, chemical reaction transfer lines, lube oil circulation loops, and industrial effluent monitoring manifolds.
Contact FlowBiz Exports for detailed dimensional CAD drawings, pressure-temperature rating charts, or an instant commercial quotation for your pipeline inspection requirements.