Goel Glass manufactures premium Borosilicate Glass 3.3 Inline Tubular Sight Glasses designed for installation within non-transparent and transparent process piping networks. Engineered to deliver continuous, unobstructed 360-degree panoramic visual monitoring, these sight glasses allow plant engineers and operating personnel to immediately observe liquid flow rates, fluid clarity, color variations, entrained gas bubbles, and phase transitions across critical fluid transfer lines.
Each sight glass assembly integrates a heavy-wall Borosilicate 3.3 cylindrical tube held under compression within an armored external metal frame constructed of welded flanges and heavy tie studs. This rigid metallic structure absorbs mechanical vibrations, piping misalignments, and thermal expansion forces from adjacent steel piping, ensuring that mechanical stresses are never transferred to the glass component. Check-nut clamping maintains uniform compression on the glass cylinder while allowing straightforward disassembly and component replacement without needing to disrupt adjacent pipe runs.
To guarantee exceptional chemical resistance across aggressive acids and solvents, precision-machined virgin PTFE bushes and gaskets isolate both ends of the glass tube from the metallic flanges. The process fluid contacts exclusively inert Borosilicate 3.3 and virgin PTFE, providing absolute protection against aggressive acids, organic solvents, and pharmaceutical media. A transparent, high-impact outer acrylic shield completely encloses the glass cylinder, providing an additional layer of personal protection against external impacts or mechanical damage.
Goel Glass tubular sight glasses are suitable for both horizontal and vertical flow configurations, available with armored frames in SS 304, SS 316, or Carbon Steel, with flange drilling conformant to Table E, ANSI 150#, or DIN standards.
Full circumferential visibility enables instant inspection of turbulence, flow status, color consistency, and phase separation from any viewing angle.
Robust SS304 or SS316 welded flange frame with tie studs isolates the glass from pipeline vibrations, thermal expansion, and bending loads.
Dual PTFE bushes ensure that process media touches only inert glass and pure PTFE, preventing metallic contamination and resisting harsh chemicals.
Transparent shatter-resistant outer sleeve envelops the glass cylinder to shield operators and protect against accidental external impacts.
Engineered for seamless horizontal, vertical, or angled pipeline integration across pressure ranges up to standard design ratings.
Check-nut compression arrangement facilitates rapid glass inspection, cleaning, or tube replacement with minimal plant downtime.
Sterile transfer lines, API crystallizers, solvent distribution manifolds, and clean-in-place (CIP) verification.
Reflux return pipelines, distillate flow monitoring, receiver line viewing, and liquid-liquid decantation observation.
Monitoring concentrated sulfuric, nitric, and hydrochloric acid transfers where metallic indicators suffer rapid degradation.
Visual detection of turbidity, solids entrainment, oil-water interface separation, and neutralization discharge lines.
| DN | L | L1 | Cat.Ref. Table E |
|---|---|---|---|
| 25 | 192 | 150 | SG1/E/304 |
| 40 | 192 | 150 | SG1.5/E/304 |
| 50 | 192 | 150 | SG2/E/304 |
| 80 | 192 | 150 | SG3/E/304 |
| 100 | 192 | 150 | SG4/E/304 |
| 150 | 192 | 150 | SG6/E/304 |
| DN | L | L1 | Cat.Ref. Table E |
|---|---|---|---|
| 25 | 192 | 150 | SG1/E/316 |
| 40 | 192 | 150 | SG1.5/E/316 |
| 50 | 192 | 150 | SG2/E/316 |
| 80 | 192 | 150 | SG3/E/316 |
| 100 | 192 | 150 | SG4/E/316 |
| 150 | 192 | 150 | SG6/E/316 |