FLOW CONTROL
TUBULAR GAUGE VALVES - CARBON STEEL
Tubular Gauge Valves - Carbon Steel
-
Features
- Sizes 1/2" NPT up to 2" Flanged
- Auto Ball Checks
- For Glass Tube or Shielded Gauges
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Ratings
- Pressure Ratings are subject to the limitations of the gauge glass (Glass)
- Temperature Ratings are subject to the limitations of the packing (Glass).
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Materials
- Body: Carbon Steel
- Glass Packing on 454/456: Graphite
- Glass Packing on 442: Viton®* O-Ring
- Glass Packing on 412: Neoprene
- Stem Packing: Graphite Composite
- Stem Packing for 442: Teflon®*
A Special Note About Corrosion
- Excessive corrosion may result in leakage, glass breakage, and premature valve failure.
- Be sure all wetted components of the gauge are constructed with materials compatible with the service medium. John C. Ernst Co. does not make chemical compatibility recommendations.
- See the "Compass Corrosion Guide" or equivalent for material compatibility
Model 454 has an integral bonnet and stem seat.
Model 456 has a union bonnet for stem seat replacement.
Model 442 can have a drain valve as an option.
| Model | Size NPT | Glass OD | Glass Length from Centers | Rod Length from Centers |
|---|---|---|---|---|
| 412-04 | 1/2" | 5/8" | - 2" | - 1" |
| 412-05 | 3/4" | 3/4" | - 2" | - 1" |
| 442-02 | 1/2" | 5/8" | - 2" | - 1/2" |
| 442-03 | 3/4" | 3/4" | - 2" | - 1/2" |
| 454-04 | 1/2" | 5/8" | - 1-3/4" | - 2-1/4" |
| 454-05 | 3/4" | 3/4" | - 1-3/4" | - 2-1/4" |
| 454-06 | 1" | 3/4" | - 1-3/4" | - 2-1/4" |
| 456-04 | 1/2" | 5/8" | - 1-3/4" | - 2-1/4" |
| 456-05 | 3/4" | 3/4" | - 1-3/4" | - 2-1/4" |
| 456-06 | 1" | 3/4" | - 1-3/4" | - 2-1/4" |
| Model | Maximum Liquid Pressure @ Temp PSIG / °F | Steam Service PSIG | Auto Ball Checks |
|---|---|---|---|
| 412 | 500/100°F to 500/425°F | 500 | Yes |
| 442 | 500/100°F to 500/425°F | N/A | Yes |
| 454 | 600/100°F to 345/400°F | 345 | Yes |
| 456 | 600/100°F to 345/400°F | 345 | Yes |