Data Sheet

Bulletin 71.4:MR98
17
NOMINAL
BODY SIZE,
In. / DN
SPRING RELIEF
PRESSURE RANGE
COLOR
CODE
RELIEF
PRESSURE
SETTING
PRESSURE BUILD-UP OVER RELIEF SETTING, psig / bar
15 / 1.0 20 / 1.4  30 / 2.1
psi bar psig bar lbs/h kg/h lbs/h kg/h lbs/h kg/h lbs/h kg/h
1/4 NPT
2 to 7 0.14 to 0.48 Yellow
2 0.14 59 26.8 72 32.6 82 37.3 93 42.1
5 0.34 63 28.5 76 34.5 86 39.3 97 44.1
6 to 14 0.41 to 0.97 Green 10 0.69 66 29.9 82 37.2 94 42.7 110 48.2
12 to 25 0.83 to 1.7 Red
15 1.0 67 30.3 86 39.2 100 45.3 110 51.5
20 1.4 73 33 92 41.8 110 48.2 120 54.5
25 1.7 77 35.2 98 44.7 110 51.6 130 58.5
20 to 38 1.4 to 2.6 Blue
25 1.7 70 32 91 41.5 110 48.8 120 56.2
30 2.1 74 33.9 96 43.7 110 51.4 130 59
35 2.4 78 35.4 100 45.5 120 53.6 140 61.7
1/2 / 15
2 to 7 0.14 to 0.48 Yellow
2 0.14 160 72.2 190 84.9 210 97.1 240 109
5 0.34 180 79.9 200 92.3 230 104 260 116
6 to 14 0.41 to 0.97 Green 10 0.69 190 88.2 230 103 250 116 280 128
12 to 25 0.83 to 1.7 Red
15 1.0 180 81.6 210 97 240 110 270 123
20 1.4 210 94.6 240 108 270 121 290 133
25 1.7 230 102 260 118 290 130 310 142
20 to 38 1.4 to 2.6 Blue
25 1.7 260 120 310 140 330 151 360 163
30 2.1 290 130 330 150 360 163 380 175
35 2.4 310 140 360 162 380 175 410 187
3/4 and 1 /
20 and 25
2 to 7 0.14 to 0.48 Yellow
2 0.14 280 128 340 156 410 187 480 219
5 0.34 310 142 380 171 440 201 510 231
6 to 14 0.41 to 0.97 Green 10 0.69 360 165 430 197 510 230 580 262
12 to 25 0.83 to 1.7 Red
15 1.0 370 168 440 201 550 248 640 290
20 1.4 400 181 480 216 600 271 690 315
25 1.7 420 192 510 232 650 293 750 339
20 to 38 1.4 to 2.6 Blue
25 1.7 380 174 470 216 630 285 750 339
30 2.1 400 184 500 227 670 305 800 364
35 2.4 420 191 520 236 710 324 850 389
Table 9. Steam Relief Capacities in Lbs per Hour / kg/h, Types MR98L and MR98LD with Metal Diaphragm Only (continued)