Observation Ports, Sight Flow Indicators & Blast Gate Valves | Boiler Supplies Observation Ports & Peep Sites Round Observation Port Sights
The standard housings are made of Carbon Steel. Fabrication in other metal materials is also possible. Four, six, and eight inch sizes are available from stock with a carbon or stainless steel housing.
Stainless Steel Units along with other sizes are available upon request.
*Add code P (for pyrex) or code Q (for quartz) at the end of model number "E" dimension = Mounting bolt pattern Mounting flange gaskets are provided with all complete units Glass Options Temperature ratings apply only for the operating conditions of the glass. Ratings for housings vary on type of steel.
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.
| Part # |
Unit Size |
Viewing Area |
B | C | D | E |
F Bolts & size |
PSI Rating |
Wt., lbs. |
Pyrex Glass"P" Or Quartz Glass "Q" |
Carbon Steel Or Stainless Steel Housing |
Description | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4ROP | 4" | 3-9/16" | 7-1/8" | 1/8" | 1" | 6-3/8" | 6 @ 9/32" | 5 | 3 |
Round Observation Port Sights |
Add to RFQ | ||
| 6ROP | 6" | 5-9/16" | 9-5/8" | 1/8" | 1-1/4" | 8-1/2" | 6 @ 11/32" | 5 | 4 |
Round Observation Port Sights |
Add to RFQ | ||
| 8ROP | 8" | 7-9/16" | 11-5/8" | 1/8" | 1-1/4" | 10-1/2" | 8 @ 11/32" | 5 | 5 |
Round Observation Port Sights |
Add to RFQ |
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