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We
offer offset and straight pattern valves that isolate the
gage chamber from the liquid contents of the vessel.
Offset valves have an advantage of permitting the inside of
the gage glass to be cleaned easily with a minimum of disassembly.
By removing the 1/2" vent and drain plug, a straight passage
through the gage chamber is opened. A brush can be inserted
through the valve vent and drain for glass cleaning.
Both upper and lower valves in each set are equipped with
horizontal ball checks. Balls are located on the vessel side
of the valve seat.
Valves with ball checks omitted meet ASME
boiler requirements, the lower valve is available with an
optional vertical rising ball check located in the offset
portion of the valve body, and the upper valve has a leaky
seat.
Valves shown are offset.
The offset distance from valve stem center to gage center
is 3/4".
Model 498 which has an Outside Screw & Yoke bonnet
(OS&Y) is not shown.
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Features
•
Sizes 1/2" NPT up to 1" Flanged
• Offset Pattern, Straight Avail.
• Union Vessel Connections
• Rigid or Union Gauge
Connections
• Conforms to AISI / ASTM Specs
• ASME Boiler Code Acceptable
• Auto Ball Check Shutoffs
• For Steam/Water
Service
Ratings
•
4000 psi @ 100°F /
2620 psi @750°F
Materials
•
Body: Carbon Steel (316SS is Opt.)
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Stem Packing: Grafoil
•
Trim: Stainless Steel
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
For
compatible Gauges select Low
or Medium Pressure
Gauges
| Model |
Vessel
Conn.
Size NPT |
Gage
Conn.
Type |
Bonnet
Type |
| 450-04 CSR |
1/2" |
Rigid |
Integral |
| 450-04 CSU |
1/2" |
Union |
Integral |
| 450-05 CSR |
3/4" |
Rigid |
Integral |
| 450-05 CSU |
3/4" |
Union |
Integral |
| 450-06 CSR |
1" |
Rigid |
Integral |
| 450-06 CSU |
1" |
Union |
Integral |
| 460-04 CSR |
1/2" |
Rigid |
Union |
| 460-04 CSU |
1/2" |
Union |
Union |
| 460-05 CSR |
3/4" |
Rigid |
Union |
| 460-05 CSU |
3/4" |
Union |
Union |
| 460-06 CSR |
1" |
Rigid |
Union |
| 460-06 CSU |
1" |
Union |
Union |
| 498-04 CSR |
1/2" |
Rigid |
OS&Y |
| 498-04 CSU |
1/2" |
Union |
OS&Y |
| 498-05 CSR |
3/4" |
Rigid |
OS&Y |
| 498-05 CSU |
3/4" |
Union |
OS&Y |
| 498-06 CSR |
1" |
Rigid |
OS&Y |
| 498-06 CSU |
1" |
Union |
OS&Y |
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