Data Sheet
Bulletin 71.4:MR98
26
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Table 14. Steam Relief Capacities in Lbs per Hour / kg/h, Types MR98H and MR98HD with Metal Diaphragm Only
NOMINAL
BODY SIZE,
In. / DN
SPRING RELIEF
PRESSURE
RANGE
COLOR
CODE
RELIEF
PRESSURE
SETTING
PRESSURE BUILD-UP OVER RELIEF SETTING, psig / bar
5 / 0.34 15 / 1.0 20 / 1.4
psi bar psig bar lbs/h kg/h lbs/h kg/h lbs/h kg/h lbs/h kg/h lbs/h kg/h
1/4 NPT
15 to 35 1.0 to 2.4 Yellow
15 1.0 22 10.1 32 14.4 46 20.8 69 31.2 91 41.6
25 1.7 26 11.8 36 16.5 52 23.5 78 35.6 100 47.6
35 2.4 31 14 42 18.9 58 26.3 87 39.7 120 53.1
25 to 75 1.7 to 5.2 Green
35 2.4 28 12.9 38 17.3 52 23.9 78 35.6 100 47.4
50 3.4 34 15.4 44 20 59 26.9 86 39.2 110 51.5
75 5.2 42 19.2 53 24.2 70 31.9 99 44.9 130 58
70 to 140 4.8 to 9.7 Red
75 5.2 35 15.9 43 19.7 56 25.4 80 36.1 100 46.9
100 6.9 42 19.2 52 23.7 67 30.4 92 42 120 53.5
125 8.6 48 21.9 59 26.7 74 33.8 100 46.6 130 59.4
130 to
200
9.0 to
13.8
Blue
150 10.3 55 25.1 65 29.4 79 35.9 130 60.1 190 84.3
175 12.1 61 27.5 71 32.3 87 39.5 140 64.9 200 90.2
200 13.8 68 31 79 35.8 95 43 150 69.6 210 96.1
1/2 / 15
15 to 35 1.0 to 2.4 Yellow
15 1.0 23 10.5 63 28.9 120 56.2 170 78.5 220 101
25 1.7 47 21.2 90 41 160 70.5 210 95.3 260 120
35 2.4 64 29.1 100 47.6 170 75.3 230 105 300 134
25 to 75 1.7 to 5.2 Green
35 2.4 36 16.2 55 25 84 38.1 150 67.4 210 96.7
50 3.4 60 27.4 84 38 120 53.9 180 81.7 240 110
75 5.2 78 35.7 99 45.1 130 59.2 200 88.7 260 118
70 to 140 4.8 to 9.7 Red
75 5.2 72 32.7 89 40.5 110 52 170 77.7 230 103
100 6.9 87 39.3 100 47.3 130 59.2 190 85 240 111
125 8.6 99 45.2 120 54.1 150 67.4 200 92.2 260 117
130 to
200
9.0 to
13.8
Blue
150 10.3 120 54.3 140 61.6 160 72.4 200 92.3 250 112
175 12.1 140 61.4 150 69.1 180 80.6 220 102 270 123
200 13.8 150 66.6 160 74.4 190 86.2 240 109 290 131
3/4 and 1 /
20 and 25
15 to 35 1.0 to 2.4 Yellow
15 1.0 160 73.2 200 91.7 260 119 330 148 390 177
25 1.7 160 74.7 210 96.1 280 128 370 166 450 204
35 2.4 190 85.6 240 107 310 139 400 184 500 228
25 to 75 1.7 to 5.2 Green
35 2.4 150 66.9 190
88.4 270 121 360 163 450 205
50 3.4 160 71.7 210 93.6 280 126 380 174 490 222
75 5.2 200 90.9 250 112 320 144 440 201 570 258
70 to 140 4.8 to 9.7 Red
75 5.2 170 76.5 210 97.4 280 129 390 176 490 224
100 6.9 210 93.7 250 115 320 147 440 202 560 256
125 8.6 220 101 270 123 340 156 470 213 600 271
130 to
200
9.0 to
13.8
Blue
150 10.3 270 124 310 143 380 173 500 225 610 278
175 12.1 310 142 360 163 430 193 560 255 690 316
200 13.8 340 156 390 178 460 211 590 270 720 328
1-1/2 and 2 /
40 and 50
5 to 35
0.34 to
2.4
Dark gray
5 0.34 320 144 420 191 580 261 760 345 940 428
10 0.69 500 229 620 281 790 358 950 431 1100 503
15 1.0 540 247 650 295 810 368 1000 464 1200 560
25 1.7 680 311 820 371 1000 461 1200 560 1400 659
35 2.4 780 355 930 422 1100 521 1400 641 1700 761
20 to 65 1.4 to 4.5
Black with
light blue
stripe
25 1.7 500 228 610 278 780 352 1000 462 1300 572
35 2.4 580 264 740 334 970 440 1200 561 1500 682
50 3.4 660 299 820 371 1100 478 1400 620 1700 762
65 4.5 750 341 910 412 1100 519 1500 687 1900 854
50 to 100 3.4 to 6.9 Light gray
50 3.4 480 219 600 274 780 356 1100 492 1400 629
75 5.2 690 312 840 380 1100 481 1400 656 1800 830
100 6.9 860 393 1000 470 1300 585 1700 764 2100 943
75 to 170
5.2 to
11.7
Black
75 5.2 540 244 630 286 770 349 1000 476 1300 604
100 6.9 730 330 860 390 1100 479 1400 627 1700 774
125 8.6 840 381 1000 459 1300 575 1600 743 2000 911
170 11.7 1100 508 1300 597 1600 731 2000 928 2500 1120