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Pressure-Rated Borosilicate Glass Discs
- Color: Clear
- Max. Temperature: See table
- Fabrication: See table
Commonly used as sight glass. Also called Pyrex and Schott glass, borosilicate glass resists clouding and pitting and is highly chemical and heat resistant. With a low rate of thermal expansion, it stays dimensionally stable during changes in temperature.
Tempered glass is stronger than annealed glass.
| Dia. | Dia. Tolerance | Lg. | Lg. Tolerance | Max. Pressure, psi | Max. Temperature, °F | Edge Fabrication | Specifications Met | Each | |
Tempered Glass | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3 1/2" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 525 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 4" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 450 | 500° | Ground | MIL-G-2860 | 0000000 | 00000 |
| 4 1/2" | -0.015" to 0.015" | 3/8" | -0.031" to 0.031" | 100 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 5" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 300 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 6" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 225 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 6 3/4" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 180 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 8 3/8" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 105 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 9" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 95 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |
| 10" | -0.015" to 0.015" | 3/4" | -0.031" to 0.031" | 85 | 500° | Ground | MIL-G-2860 | 0000000 | 000000 |