Data Sheet

Bulletin 71.4:MR98
27
Table 14. Steam Relief Capacities in Lbs per Hour / kg/h, Types MR98H and MR98HD with Metal Diaphragm Only (continued)
NOMINAL
BODY SIZE,
In. / DN
SPRING RELIEF
PRESSURE
RANGE
COLOR
CODE
RELIEF PRESSURE
SETTING
PRESSURE BUILD-UP OVER RELIEF SETTING, psig / bar
30 / 2.1 50 / 3.4  
psi bar psig bar 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 1.0 110 52.2 160 73.5 220 98.1 270 122
25 1.7 130 59.2 180 82.4 240 108 290 131
35 2.4 150 66 200 91.8 260 117 310 140
25 to 75 1.7 to 5.2 Green
35 2.4 140 61.7 200 90.4 260 117 310 140
50 3.4 150 68.3 220 102 280 129 340 154
75 5.2 170 79 270 121 330 150 390 178
70 to 140 4.8 to 9.7 Red
75 5.2 150 68.3 240 111 310 143 380 174
100 6.9 170 77.5 280 126 350 160 430 195
125 8.6 190 85.3 300 137 390 178 480 218
130 to
200
9.0 to
13.8
Blue
150 10.3 220 101 300 134 400 182 510 230
175 12.1 240 108 310 143 430 195 550 248
200 13.8 250 114 330 150 440 202 560 254
1/2 / 15
15 to 35 1.0 to 2.4 Yellow
15 1.0 280 125 390 175 520 237 660 298
25 1.7 320 145 430 196 570 258 700 320
35 2.4 360 162 480 218 620 281 760 344
25 to 75 1.7 to 5.2 Green
35 2.4 270 125 400 181 520 236 640 291
50 3.4 310 143 460 210 580 265 700 319
75 5.2 350 160 540 244 660 302 790 361
70 to 140 4.8 to 9.7 Red
75 5.2 330 148 520 237 650 297 790 357
100 6.9 350 161 580 262 720 329 870 396
125 8.6 370 170 610 277 790 358 970 439
130 to
200
9.0 to
13.8
Blue
150 10.3 350 160 560 256 810 369 1100 482
175 12.1 380 173 600 272 860 391 1100 510
200 13.8 400 183 630 285 910 414 1200 543
3/4 and 1 /
20 and 25
15 to 35 1.0 to 2.4 Yellow
15 1.0 490 224 700 317 940 426 1200 536
25 1.7 560 253 770 352 1000 463 1300 575
35 2.4 620 282 850 388 1100 503 1400 619
25 to 75 1.7 to 5.2 Green
35 2.4 580 263 830 378 1100 499 1400 621
50 3.4 640 290 940 426 1200 551 1500 676
75 5.2 750 340 1100 504 1400 637 1700 771
70 to 140 4.8 to 9.7 Red
75 5.2 680 309 1100 480 1400 617 1700 755
100 6.9 770 352 1200 543 1500 697 1900 850
125 8.6 830 377 1300 589 1700 765 2100 940
130 to
200
9.0 to
13.8
Blue
150 10.3 850 387 1300 604 1800 839 2400 1080
175 12.1 940 429 1400 655 2000 900 2500 1140
200 13.8 990 450 1500 693 2100 960 2700 1230
1-1/2 and 2 /
40 and 50
5 to 35
0.34 to
2.4
Dark gray
5 0.34 1300 579 1900 878 2700 1210 3400 1540
10 0.69 1400 650 2100 944 2800 1280 3600 1620
15 1.0 1500 703 2200 990 2900 1330 3700 1680
25 1.7 1800 805 2400 1100 3200 1430 3900 1770
35 2.4 2000 910 2700 1210 3400 1550 4200 1900
20 to 65 1.4 to 4.5
Black with
light blue
stripe
25 1.7 1600 721 2200 1020 3000 1370 3800 1710
35 2.4 1800 840 2500 1150 3300 1490 4000 1830
50 3.4 2100 936 2800 1290 3600 1620 4300 1960
65 4.5 2300 1040 3100 1410 3900 1780 4700 2140
50 to 100 3.4 to 6.9 Light gray
50 3.4 1700 785 2400 1100 3300 1490 4200 1890
75 5.2 2300 1040 3200 1450 4000 1820 4800 2200
100 6.9 2600 1190 3700 1690 4600 2100 5500 2510
75 to 170
5.2 to
11.7
Black
75 5.2 1800 797 2600 1180 3600 1630 4600 2080
100 6.9 2300 1040 3500 1570 4400 2000 5300 2430
125 8.6 2700 1210 4000 1810 5000 2260 6000 2720
170 11.7 3300 1510 5000 2280 6100 2790 7300 3300