Saf-T-Eye Observation Ports
Saf-T-Eye® observation ports are available in three different sizes and a variety
of styles.
All models are made of cast iron except Model 16 (Angular), which is carbon steel. Some units are also produced in stainless steel. Both the shutter and protective screen are stainless steel. Additional information can be found on the individual model.
The Saf-T-Eye® Observation Ports enable the operator to safely and clearly inspect the interior. Adjustments can be made under actual operating conditions without combustion or air infiltration. Four types of glass are available for a variety of viewing conditions. High and Low temperature glass, as explained below, is protected by the stainless steel screen and stainless shutter. The viewing is done by pulling handle down; when finished release handle and shutter closes automatically. Glass can be cleaned and removed quickly by using wing nuts.
Each unit includes a 1/4" NPT purge hole for adding cooling capabilities with air or nitrogen. Sealant can be added to improve the seal in low-pressure applications. All Saf-T-Eye® observation ports are provided with a mounting flange gasket that fits securely between the unit and the vessel wall. All configurations of the Saf-T-Eye® units are available in cast iron and stainless steel (except for the Model 12 (Angular) and 16, which is carbon steel) from stock. Fabrication in other metals for specific applications is available upon request.
STANDARD OR PRESSURE-TITE
The Pressure-Tite Saf-T-Eye®, designated by a "PT" in the model number, has been sealed with a high-temperature sealant between the components of the body and frame to prevent air leakage when used in a low-pressure application. A mounting flange gasket is provided for installation between the unit and the furnace wall. The unit is equipped with a 1/4" NPT purge hole to run air or nitrogen for cooling of the port. If 1/4" NPT hole is not sufficient, it can be replaced with a 1/2" NPT hole.
The Saf-T-Eye® comes in two models: Standard or Pressure Tite. A mounting flange gasket is provided for installation between the unit and the furnace wall. The unit is equipped with a 1/4" NPT purge hole to run air or nitrogen for cooling of the port. It can be replaced with a 1/2" NPT hole.
GLASS TYPES AVAILABLE
Vycor Clear - Designated by a "VC" in the model number. Maximum intermittent operating temperature is 2192°F. Maximum continuous operating temperature is 1652°F (Glass Only)*. A blue-colored heat resisting borosilicate glass.
Vycor Blue - Designated by a "VB" in the model number. Maximum intermittent operating temperature is 2192°F. Maximum continuous operating temperature is 1652°F (Glass Only)*. A blue-colored heat resisting borosilicate glass.
Quartz Clear - Designated by a "Q" in the model number. Maximum intermittent operating temperature is 2048°F. Maximum continuous operating temperature is 1600°F (Glass Only)*.
Pyrex Clear - (borosilicate glass) Designated by a "P" in the model number. Maximum intermittent operating temperature is 554°F. Maximum continuous operating temperature is 446°F (Glass Only)* . Glass is heat strengthened for safety and is coated with a heat reflecting shield.
*Note: The iron or steel bodies have different maximum temperature than the viewing glass.
The Saf-T-Eye® Basic Unit Model No. 11 is made of a cast iron body and assembled with suitable glass and gaskets for its operating environment. The Model No. 11 is available from stock in cast iron and stainless steel.
The operating environment and heat should be considered when ordering type of steel and glass.
Basic Unit - Model No. 11
The Saf-T-Eye® Basic Unit Model No. 11 is made of a cast iron body and assembled with suitable glass and gaskets for its operating environment. The Model No. 11 is available from stock in cast iron and stainless steel.
The operating environment and heat should be considered when ordering type of steel and glass.
Double Shutter Unit - Model No. 11 DS
This Saf-T-Eye® unit has two shutter assemblies for added protection of the glass and screen. Each shutter opens and closes when the handle is pulled. Two 1/4" purge connections are provided for added cooling capabilities of this unit.
The operating environment and heat should be considered when ordering type of steel and glass.
Angular Unit - Model No. 12
The "E" Dimension of these units is cut on a thirty degree angle providing a different viewing aspect inside the vessel. The #12 unit has a viewing area of 2-3/4" by 3-1/2". For a larger angular unit, see Model 16 (Angular).
The operating environment and heat should be considered when ordering type of steel and glass.
Long "E" Dimension Unit - Model No. 14
When the vessel has a deeper wall thickness, a longer "E" dimension is available. If a special "E" dimension is required, the unit can be modified to accommodate the specification.
The operating environment and heat should be considered when ordering type of steel and glass.
Basic Unit - Model No. 15
The Saf-T-Eye® Basic Unit Model No. 15 is available in three metals and four types of glass. The Saf-T-Eye® Basic Unit Model No. 15-309SS is made of 309 stainless steel and is suitable for higher operating heat when equipped with higher temperature glass and gaskets.
*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.
Angular Unit - Model No. 16
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 No. 12 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 No. 20
The Saf-T-Eye® Basic Unit Model No. 20 is made of a stainless steel body and assembled with suitable glass and gaskets for its operating environment. The Model No. 20 is currently only available in 309 stainless steel.
The operating environment and heat should be considered when ordering type of steel and glass.
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