Data Sheet

Bulletin 71.4:MR98
23
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 8.5 32.3 10 39.3 12 45.8 14 52.2
25 1.7 9.6 36.2 11 42.7 12 46.9 14 51.1
35 2.4 11 40.1 12 45.4 13 48.8 14 52.2
25 to 75
1.7 to
5.2
Green
35 2.4 10 39.1 12 46.2 14 51.6 15 57.1
50 3.4 11 43 13 49.6 15 55 16 60.5
75 5.2 13 48 15 55.6 16 60.3 17 65.1
70 to
140
4.8 to
9.7
Red
75 5.2 11 41.9 14 54.5 16 59.8 17 65.1
100 6.9 12 44.5 15 57.9 17 63.9 19 70
125 8.6 13 47.5 17 62.4 18 68.9 20 75.3
130 to
200
9.0 to
13.8
Blue
150 10.3 12 46.9 17 63.6 19 71.1 21 78.7
175 12.1 13 47.7 17 65.1 19 73.4 22 81.7
200 13.8 13 48.3 18 67 20 73.8 21 80.6
1/2 / 15
15 to 35
1.0 to
2.4
Yellow
15 1.0 23 86.3 28 105 32 122 37 140
25 1.7 25 96.1 30 113 34 129 38 145
35 2.4 28 105 32 121 36 135 40 150
25 to 75
1.7 to
5.2
Green
35 2.4 27 101 32 121 36 135 40 150
50 3.4 29 110 35 131 38 144 42 157
75 5.2 33 125 38 145 41 156 45 168
70 to
140
4.8 to
9.7
Red
75 5.2 30 115 38 143 41 156 45 169
100 6.9 33 126 41 154 44 167 48 180
125 8.6 34 130 43 164 47 177 50 190
130 to
200
9.0 to
13.8
Blue
150 10.3 27 104 39 147 45 170 51 194
175 12.1 29 109 41 153 46 175 52 197
200 13.8 29 109 41 157 48 181 54 206
3/4 and 1 /
20 and 25
15 to 35
1.0 to
2.4
Yellow
15 1.0 43 163 52 196 59 224 67 252
25 1.7 47 178 55 208 62 235 69 263
35 2.4 51 194 58 221 65 246 72 272
25 to 75
1.7 to
5.2
Green
35 2.4 51 192 58 221 65 246 72 272
50 3.4 55 210 63 238 69 262 76 286
75 5.2 62 233 69 263 75 285 81 307
70 to
140
4.8 to
9.7
Red
75 5.2 57 216 69 260 75 283 81 306
100 6.9 62 235 74 280 80
303 86 325
125 8.6 67 255 80 302 85 323 91 345
130 to
200
9.0 to
13.8
Blue
150 10.3 60 229 80 302 87 331 95 360
175 12.1 64 243 84 317 92 347 100 377
200 13.8 67 255 87 328 95 360 100 391
1-1/2 and 2 /
40 and 50
5 to 35
0.34 to
2.4
Dark gray
5 0.34 110 433 150 563 180 666 200 769
10 0.69 130 474 160 591 180 690 210 790
15 1.0 130 499 160 614 190 710 210 806
25 1.7 140 547 170 650 200 742 220 834
35 2.4 160 598 180 693 210 780 230 867
20 to 65
1.4 to
4.5
Black with
light blue
stripe
25 1.7 140 533 170 657 200 747 220 838
35 2.4 150 564 180 693 210 780 230 867
50 3.4 170 625 200 751 220 832 240 914
65 4.5 180 666 210 790 230 875 250 959
50 to
100
3.4 to
6.9
Light gray
50 3.4 150 586 190 728 220 819 240 911
75 5.2 170 655 210 802 240 893 260 984
100 6.9 190 702 230 861 250 953 280 1050
75 to
170
5.2 to
11.7
Black
75 5.2 150 567 200 740 230 852 250 963
100 6.9 160 610 210 793 240 906 270 1020
125 8.6 170 645 220 835 250 956 280 1080
170 11.7 180 673 230 885 270 1020 300 1150
Table 12. Water Relief Capacities in Gallons per Minute / L/min, Types MR98H and MR98HD with Elastomer Diaphragm (continued)