| Glass & Tubing for Level Gauges |
|
Annealed
Borosilicate - Clear
Good for normal service where one surface is heated to a maximum
temperature of 446°F (230°C), using 1/4" or thicker glass. The
temperature difference between ambient and process should not
exceed 150°F.
Tempered Borosilicate - Clear
Recommended for use where higher pressures are required than
can be obtained with Annealed Borosilicate. Maximum service
temperature is 500°F (260°C). No corrosion to surface, nor severe
chill can be tolerated.
Cobalt Blue Furnace - Blue
Used to reduce glare when observing flame, smoke, and ash intensity
in power plants and marine boilers. Thickness up to 1/4".
Vycor - Clear
Can be used continuously at 1652°F (900°C). The temperature
difference between ambient and process surfaces should not exceed
600°F. Thickness up to 1/2". Excellent optical properties.
Fused Quartz - Clear
For industrial and laboratory applications. Can be used continuously
at 1742°F (950°C). Commercial Grade is standard. Optical Grade
is available.
Pyroceram - Amber Tint
This transparent glass-ceramic material will not delaminate
at elevated temperatures. Available in 5mm thickness only. Mainly
used in furnaces. |
|
Glass
For:
•
Furnaces, Ovens
•
Observation
Equipment
•
Flow
Indicators
•
Pressure
Vessels/Tanks |
Tempering
Tempering
greatly increases the strength of glass and helps it overcome
the damaging effect of scratches and other surface defects.
Glass is heated to a specified point above its annealing temperature,
then quickly quenched causing the surface to shrink and harden.
While the interior cools more slowly it tries to shrink, putting
itself in tension and creating a compressive stress on the surface.
When completed, the surface compression must be overcome and
a tensile stress introduced before the glass can be harmed.
Thus, the mechanical and impact strength as well as the thermal
shock resistance are improved greatly. |
Pressure
Chart for Circles 
Unsupported Diameter - inches |
Note:
All Glass should be protected from thermal
shock, and shielding is recommended. |
|
|
| Model
Selection Table |
Adjust
above |
| Model |
Type |
Color |
Shape |
Normal
Service Rating °F |
Pressures
by the following: |
| 530 |
Annealed
Borosilicate |
Clear |
Circle |
446 |
100% |
| 531 |
Annealed
Borosilicate |
Clear |
Rectangle |
446 |
- |
| 532 |
Cobalt
Blue Furnace |
Blue |
Circle |
446 |
100% |
| 533 |
Cobalt
Blue Furnace |
Blue |
Rectangle |
446 |
- |
| 534 |
Vycor |
Clear |
Circle |
1652 |
75% |
| 535 |
Vycor |
Clear |
Rectangle |
1652 |
- |
| 536 |
Quartz |
Clear |
Circle |
1742 |
60% |
| 537 |
Quartz |
Clear |
Rectangle |
1742 |
- |
| 538 |
Tempered
Borosilicate |
Clear |
Circle |
500 |
300% |
| 539 |
Tempered
Borosilicate |
Clear |
Rectangle |
500 |
- |
| 528 |
Pyroceram
|
Amber
Tint |
Circle |
1292 |
- |
| 529 |
Pyroceram |
Amber
Tint |
Rectangle |
1292 |
- |
|
