44
Control systems Safety valves
Correction Factor (Ks) for Superheated Steam
Satured Steam Temperature
Set Pressure
Temperature
°C
160 170 180 190 200 210 230 240 250 260 270 280
bar g psi g °C °F
°F
320 340 360 380 400 420 440 460 480 500 520 540
1.0 15 122 250 1.00 0.99 0.99 0.98 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
1.5 20 128 259 1.00 0.99 0.99 0.98 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
2.0 30 134 274 1.00 0.99 0.99 0.98 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
3.0 45 144 292 1.00 0.99 0.99 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
4.0 60 152 308 1.00 1.00 0.99 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
4.7 26
5.0 70 160 316
1.00 0.99 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91
5.5 80 162 324
1.00 1.00 0.99 0.98 0.98 0.97 0.96 0.94 0.93 0.92 0.91
7.0 100 171 338
1.00 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92
8.5 120 178 350
1.00 1.00 0.99 0.98 0.96 0.95 0.94 0.93 0.92
9.5 140 182 361
1.00 0.99 0.98 0.96 0.95 0.94 0.93 0.92
12 175 192 378
1.00 0.99 0.98 0.97 0.95 0.94 0.93 0.92
14 205 198 390
1.00 0.99 0.99 0.97 0.96 0.95 0.93 0.92
16 230 205 400
1.00 0.99 0.99 0.98 0.97 0.95 0.94 0.93
18 260 210 410
1.00 0.99 0.98 0.97 0.96 0.94 0.93
21 305 217 423
1.00 1.00 0.99 0.97 0.95 0.94
Correction Factor (Ks) for Superheated Steam table continued on next page
TI-P710-01 CTLS Issue 1
Page 12 of 13
SV44H Carbon Steel Safety Valve
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