SERIES G14
REFLEX & TRANSPARENT FLAT GAUGE GLASS
FOR ARMOURED GAUGES
- Maxos® Brand
- SCHOTT USA Specification
Maxos Flat Gauge Glass is manufactured from a special formulated borosilicate glass, characterized by low coefficient of expansion, high chemical durability, and exceptional homogeneity.
Style 545 – Reflex Borosilicate
1 required per each gauge section
Style 546 – Transparent Borosilicate
2 required per each gauge section
Style 547 – High Pressure Transparent Borosilicate
2 required per each gauge section
Gaskets and shields available for all glass sizes
Ratings
| Style | Glass Size | Length Inches | Length mm | Type | Pressure and Temperature Ratings | ||
|---|---|---|---|---|---|---|---|
| Saturated steam or hot water in direct contact with glass (no mica shield) | Saturated steam or hot water in contact with glass protected with mica | Non-corrosive, non-steam service and no technically significant glass attack |
|||||
| REFLEX 545-1 545-2 545-3 545-4 545-5 545-6 545-7 545-8 545-9 | 1 2 3 4 5 6 7 8 9 | 4-1/2 5-1/2 6-1/2 7-1/2 8-5/8 9-7/8 11 12-5/8 13-3/8 | 115 140 165 190 220 250 280 320 340 | B1 B2 B3 B4 B5 B6 B7 B8 B9 | 500 PSIG @ 470°F | Mica Not used with Reflex Glass | 4000 PSIG @ 100°F |
| TRANSP. 546-1 546-2 546-3 546-4 546-5 546-6 546-7 546-8 546-9 | 1 2 3 4 5 6 7 8 9 | 4-1/2 5-1/2 6-1/2 7-1/2 8-5/8 9-7/8 11 12-5/8 13-3/8 | 115 140 165 190 220 250 280 320 340 | A1 A2 A3 A4 A5 A6 A7 A8 A9 | 500 PSIG @ 470°F | 1500 PSIG @ 597°F, Max. 608°F | 5000 PSIG @ 100°F |
| HP TRANSP. 547-1 547-2 547-3 547-4 547-5 547-6 547-7 547-8 547-9 | 1 2 3 4 5 6 7 8 9 | 4-1/2 5-1/2 6-1/2 7-1/2 8-5/8 9-7/8 11 12-5/8 13-3/8 | 115 140 165 190 220 250 280 320 340 | A1-HP A2-HP A3-HP A4-HP A5-HP A6-HP A7-HP A8-HP A9-HP | 500 PSIG @ 470°F | 1500 PSIG, Max. 608°F | Up to 6000 PSIG @ 100°F (In high pressure gauges) |
Dimensional Tolerances
| Dimensions | Tolerances | |
|---|---|---|
| Length | See above | +0”, -0.039” (+0mm, -1.5mm) |
| Width | 1.339” (34mm) | +0.008”, -0.039” (+0.2mm, -0.8mm) |
| Thickness | 0.689” (17.5mm) | +0”, -0.028” (+0mm, -1.0mm) |
| Flatness (max) | Sizes 1-3 | ≤ 0.002”, ≤ 0.05mm |
| Flatness (max) | Sizes 4-5 | ≤ 0.003”, ≤ 0.08mm |
| Flatness (max) | Sizes 6-9 | ≤ 0.005”, ≤ 0.13mm |
| Flatness (max) | All High Pressure | ≤ 0.002”, ≤ 0.05mm |
Temperature
| Thermal shock resistance | Δ T 446°F (230°C) |
|---|---|
| Max. permissible temperature | 572°F (300°C) |
| Max. permissible temperature with mica | 608°F (320°C) |
Application Notes
- Steam Service: Requires Mica protection for transparent glass in gauges rated for steam applications
- Vacuum Service: Acceptable with properly designed equipment
- Compatibility: Before ordering, verify that the glass is compatible with the design, media(s), cleaning solutions, and the environment of the application and future applications. The John C. Ernst Co. does not make compatibility recommendations. Compatibility determinations, corrosion or otherwise, are the responsibility of the user.
Some medias reduce the useful life of gauge glass by chemical action, such as Hydrofluoric Acid (HF), hot concentrated Phosphoric Acid (H3PO4), Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH) above 125°F, steam or superheated water above 250°F. Alkaline solutions attach glass very slowly at room temperatures, but as temperature is increased over 100°F, the corrosion rate rises rapidly. Steam can etch or erode glass thus weaken the glass.
WARNING: This product can expose you to certain chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov
Model Number Matrix
