globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable plug or disc element and a stationary ring seat in a generally spherical body.
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Pipe Class Ratings and Pressure Numbers (PN)
Pressure numbers (PN) compared to flange class designations
Piping Class Ratings based on the ASME B16.5 – Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard – class and the corresponding ISO 7005 PN (Pression Nominal*) ratings:
| ANSI
Class Rating [#] |
Nominal Pressure
PN |
| 150 | 20 |
| 300 | 50 |
| 400 | 64 |
| 600 | 100 |
| 900 | 150 |
| 1500 | 250 |
| 2500 | 420 |
