When a quick-opening sight glass is required in a process application, this hinged assembly, which incorporates the use of Metaglas, can be used up to 150 psi, depending on size. It is particularly suitable where a process requires sampling or additives, or when it is necessary to clean the inside of the sight glass from time to time. Both ANSI bolt-on and weld-on styles are available. Accessories available include Lumiglas luminaires and wipers.
The strongest, most secure sight glass elements available, Metaglas® mechanically prestressed windows, are available in a threaded design for process applications. Metaglas threaded sight glasses are compliant with the recently revised ASME (founded as the American Society of Mechanical Engineers) standard for electric boilers, Section I PEB-13, Water Gages. The revised ASME standard now allows manufacturers of boilers with a diameter of 16" or smaller to use a bull's-eye-type fused sight glass window instead of the traditional tubular sight glass for observation of the water level in the boiler. These sight glass are available in variety of thread type including NPT and metric straight threads. Described as offering the optics of glass and the strength of steel, these glass elements provide a level of safety, and a useful service life, well beyond that provided by conventional tempered glass or plastic in sterile service. Even at the most extreme temperatures (as high as 536° F) or in overpressure situations, sudden, total failure - that involving leakage or explosive shattering of the glass - essentially never occurs.
This sight glass features a flat face ANSI mating flange. It’s special design offers reliability against rupture, a long working life, and a smooth, easy to clean surface.
It meets a number of industry standards including the directive for pressure equipment 97/23/EG 02/98, Module H (DIN/EN/ISO 9001), AD2000 Standards W0/TRD 100, DIN 7079, DIN 7080, TÜV specifications for materials, and a Certificate of Conformity to EN 10204-3.1B.
Requires parallel flat face mounting flange and full gasket.
Sight glass disc for DIN28120 and other weld-type sight glass assemblies.
Metaglas is the strongest sight glass available.
| LJ Star | LJ Star | LJ Star | LJ Star | LJ Star | |
|---|---|---|---|---|---|
| Product Category | Sight Windows | Sight Windows | Sight Windows | Sight Windows | Sight Windows |
| Product Number | Metaglas® | Metaglas® | Metaglas® | Metaglas® | Metaglas® |
| Product Name | Hinged Sight Glass | Industrial Threaded Sight Glass Window | Bolt-on Sight Glasses to ANSI B16.5 Type 13 | Sight Glass Disc, Type 73 | Sight Glass Disc with Wiper, Type 73 SW |
| Window Shape | Circular | Circular | Circular | Circular | Circular |
| Connection Type | Bolt On (optional feature); Welded (optional feature) | Threaded - NPT | Bolt On | Welded | Welded |
| Window Diameter, Length | 2.76 to 6.3 inch (70.1 to 160 mm) | 0.3543 to 1.97 inch (9 to 50 mm) | 1.57 to 6.3 inch (40 to 160 mm) | 0.9843 to 4.72 inch (25 to 120 mm) | 1.77 to 4.72 inch (45 to 120 mm) |
| Pressure Rating | 150 psi (106 m H2O) | 1450 psi (1021 m H2O) | 150 to 300 psi (106 to 211 m H2O) | 145 to 928 psi (102 to 653 m H2O) | ? to 900 psi (? to 633 m H2O) |
