Data Sheet

Bulletin 71.4:MR98
25
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 GPM l/min GPM l/min GPM l/min GPM l/min
1/4 NPT
15 to 35 1.0 to 2.4 Yellow
15 1.0 7.4 27.9 9.7 36.7 11 42.7 13 48.8
25 1.7 7.9 30 10 38.6 12 43.5 13 48.4
35 2.4 8.3 31.3 11 40.9 12 43.5 12 46.2
25 to 75 1.7 to 5.2 Green
35 2.4 8.1 30.8 11 40.9 13 47.5 14 54.1
50 3.4 8.5 32.2 12 43.5 13 49.9 15 56.4
75 5.2 8.9 33.7 12 45.8 14 53.2 16 60.5
70 to 140 4.8 to 9.7 Red
75 5.2 8.2 31.1 12 44.3 14 51.6 16 59
100 6.9 8.4 31.7 12 45 14 53.5 16 62
125 8.6 8.5 32.3 12 46.2 15 55.4 17 64.7
130 to 200 9.0 to 13.8 Blue
150 10.3 8.3 31.3 12 44.6 15 55 17 65.4
175 12.1 8.3 31.4 12 45 15 55.6 18 66.2
200 13.8 8.3 31.3 12 45.4 15 56.6 18 67.7
1/2 / 15
15 to 35 1.0 to 2.4 Yellow
15 1.0 20 75.7 25 93.8 29 111 34 128
25 1.7 22 82.5 26 99.1 31 116 35 132
35 2.4 23 87 28 104 32 120 36 136
25 to 75 1.7 to 5.2 Green
35 2.4 21 80.2 27 101 31 117 36 134
50 3.4 23 86 29 109 33 125 37 140
75 5.2 23 88.3 31 117 35 133 39 149
70 to 140 4.8 to 9.7 Red
75 5.2 20 77.3 29 109 34 127 39 146
100 6.9 22 83.7 31 117 36 136 41 155
125 8.6 22 82.5 31 118 37 139 42 160
130 to 200 9.0 to 13.8 Blue
150 10.3 17 66.1 26 96.8 32 123 39 149
175 12.1 18 69 27 100 33 126 40 152
200 13.8 18 69.6 27 101 34 128 41 154
3/4 and 1 /
20 and 25
15 to 35 1.0 to 2.4 Yellow
15 1.0 33 125 43 162 50 190 58 219
25 1.7 36 135 45 170 53 199 60 227
35 2.4 38 143 47 179 55 207 62 235
25 to 75 1.7 to 5.2 Green
35 2.4 37 139 46 175 54 206 63 236
50 3.4 39 149 49 185 57 215 65 246
75 5.2 42 157 53 200 61 230 69 259
70 to 140 4.8 to 9.7 Red
75 5.2 38 144 51 192 59 222 67 253
100 6.9 40 151 53 202 62 234 70 266
125 8.6 41 154 56 211 65 245 74 278
130 to 200 9.0 to 13.8 Blue
150 10.3
38 142 53 200 63 239 73 277
175 12.1 38 145 55 206 65 245 75 284
200 13.8 39 147 55 210 66 251 77 293
1-1/2 and 2 /
40 and 50
5 to 35 0.34 to 2.4 Dark gray
5 0.34 93 352 120 465 150 556 170 647
10 0.69 100 381 130 487 150 573 170 659
15 1.0 110 403 130 504 160 587 180 671
25 1.7 120 440 140 538 160 621 190 703
35 2.4 120 470 150 567 170 647 190 727
20 to 65 1.4 to 4.5
Black with
light blue
stripe
25 1.7 110 426 140 536 160 619 190 702
35 2.4 120 459 150 567 170 649 190 730
50 3.4 130 486 160 603 180 685 200 767
65 4.5 140 516 170 644 190 725 210 805
50 to 100 3.4 to 6.9 Light gray
50 3.4 120 462 160 592 180 680 200 768
75 5.2 130 494 170 643 190 734 220 824
100 6.9 140 515 180 683 210 778 230 873
75 to 170 5.2 to 11.7 Black
75 5.2 120 453 160 622 190 719 220 816
100 6.9 130 484 180 667 200 769 230 870
125 8.6 130 496 180 692 210 801 240 911
170 11.7 140 523 200 738 230 860 260 982
Table 13. Water Relief Capacities in Gallons per Minute / L/min, Types MR98H and MR98HD with Metal Diaphragm (continued)