OVERVIEW :: MODEL 23 :: MODEL 23 DS :: MODEL 23 A :: MODEL 23 XL :: MODEL 45 :: MODEL 45 A ::MODEL 45 XL :: MODEL 59 :: DIMENSIONAL CHART :: MAINTENANCE & INSTALLATION
SAF Viewports units are for use in low-pressure applications (5 PSI) where 100% shutoff is not required. The “E” dimension of this unit is cut on a thirty-degree angle providing a different viewing aspect inside the vessel with a larger viewing window than the Model 23 A unit. It is available from stock in carbon steel.
*E-dimension inside the fixture can be extended up to 20″.
The operating environment and heat should be considered when ordering type of steel and glass.
| Model Number | Material | Viewing Area | A | B | C | D | E | F | G | H | I |
| #45 A | Cast Iron Stainless Steel | 4- 1/2" x 5-1/2" | 6-3/8" | 9-1/2" | 9-1/2" | - | 3-1/2" | 8" | 9-3/8" | 8" | 7-7/8" |
NOTE: Table Represents Standard Materials Available. Please Contact Us To Discuss Custom Options.
Specifications and Material Options
- 30 deg angle on mounting plate
- Available in Cast Iron and Stainless Steel
- Available with either clear borosilicate lens or clear quartz lens
- Custom Options.
- Machine modifications to suit specific requirements.
- Addition of high-temperature sealant to enhance pressure seal.
- Increase size of purge hole to allow more air flow.
- Adapt shutter with special pattern of holes to increase cooling
Glass Options
| Type | Thickness | Max. Intermittent Temperature | Max. Continuous Temperature | Code Letter |
| Quartz Clear | 5 7/8” x 4 7/8” x ¼” thick | 2048 °F / 1120 °C | 1600°F / 871 °C | Q |
| Borosilicate Clear | 5 7/8” x 4 7/8” x ¼” thick | 554°F / 290 °C | 446°F / 230 °C | B |