Flowmetering Target flowmeters 3
Sizing the TFA flowmeter for saturated steam - Horizontal orientation Notes: 1 - Maximum steam flowrates are calculated at maximum differential pressure. 2 - For vertical capacities please contact Spirax Sarco. 3 - The tables below are a guide only. Flow in kg/h Maximum flowrates in kg/h at different pressures bar g.
Steam pressure bar g
Size
1
2
3
4
5
6
7
8
9
10
12
15 20
25 30 32
Maximum flow
155
187 215
239
260
281 299
316 333
349
378
418 479
534 584 603
DN25
Minimum flow
15
19 21
24
26
28 30
32 33
35
38
42 48
53 58 60
Maximum flow
254
307 352
391
427
460 490
519 546
572
621
686 786
876 957 989
DN32
Minimum flow
25
31 35
39
43
46 49
52 55
57
62 69 79
88 96 99
Maximum flow
396
480 550
611
667
718 765
809 853
894
969 1 071 1 227 1 367 1 494 1 544
DN40
Minimum flow
40
48
55
61
67
72 77
81 85
89
97
107 123
137 149 154
3.3 10
Maximum flow
619
749 859
955 1 042 1 122 1 196 1 265 1 333 1 396 1 514 1 673 1 918 2 136 2 335 2 412
DN50
Minimum flow
62
75 86
95
104
112 120
126 133
140
151 167 192
214 233 241
Flow in lb/h Maximum flowrates in lb/h at different pressures psi g.
Steam pressure psi g
Size
14.5
29 44
58
73
87 102
116 131
145
174
218 290
363 435 464
Maximum flow
342
412 474
527
573
619 659
697 734
769
833
922 1 056 1 177 1 287 1 329
DN25
Minimum flow
33
42 46
53
57
62 66
71 73
77
84
93 106
117 128 132
Maximum flow
560
677 776
862 941 1 014 1 080 1 144 1 204 1 261 1 369 1 512 1 733 1 931 2 110 2 180
DN32
Minimum flow
55
68 77
86
95
101 108
115 121
126
137
152 174
194 212 218
Maximum flow
873 1 058 1 213 1 347 1 470 1 583 1 687 1 784 1 881 1 971 2 136 2 361 2 705 3 014 3 294 3 404
DN40
Minimum flow
88
106 121
134
148 159 170
179 187
196
214
236 271
302 328 340
Maximum flow
1 365 1 651 1 894 2 105 2 297 2 474 2 637 2 789 2 939 3 078 3 338 3 688 4 228 4 709 5 148 5 318
DN50
Minimum flow
137
165 190
209
229
247 265
278 293
309
333
368 423
472 514 531
Page 4 of 5
TI-P193-01 MI Issue 4
TFA Flowmeter for Saturated Steam Service
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