User Guide

Powertop Two-Way Flared Valves Normally Open/Normally Closed Technical Instructions
155-310P25
May 16, 2005
Siemens Industry, Inc. Page 5
Table 6. Steam Capacity - Kilograms per Hour.
Valve
Size
in
mm
Inlet Pressure - kPa
50 100
Pressure Differential – kPa
Kvs 10 25 10 20 50
15
0.85 4.3 6.8 6.04 8.54 14
2.15 10.7 17 15 21 34
20 5.4 27.1 42.8 38 54 85
25 8.6 43 68 60 85 135
32 13.7 68.8 109 97 137 216
Table 7. Body Temperature-Pressure Rating.
Temperature Pressure
psig (Kvs)
°F (°C) ANSI Class 250
-20 to 150 (-30 to 66) 400 (2758)
200 (93) 385 (2655)
250 (121) 365 (2586)
Normally Open Normally Closed
Figure 1. Nominal Close-off Ratings.