Data Sheet

Bulletin 71.4:MR98
21
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 SCFH Nm
3
/h SCFH Nm
3
/h SCFH Nm
3
/h SCFH Nm
3
/h
1/4 NPT
2 to 7 0.14 to 0.48 Yellow
2 0.14 1300 36.1 1700 44.2 1900 50.9 2100 57.5
5 0.34 1400 38.5 1700 46.9 2000 53.7 2300 60.4
6 to 14 0.41 to 0.97 Green 10 0.69 1500 40.7 1900 50.8 2200 58.4 2500 66
12 to 25 0.83 to 1.7 Red
15 1.0 1500 41.4 2000 53.6 2300 62.1 2600 70.6
20 1.4 1700 45.2 2100 57.3 2500 66 2800 74.8
25 1.7 1800 48.2 2300 61.3 2600 70.7 3000 80.2
20 to 38 1.4 to 2.6 Blue
25 1.7 1600 43.9 2100 56.8 2500 66.9 2900 77
30 2.1 1700 46.4 2200 59.8 2600 70.4 3000 80.9
35 2.4 1800 48.6 2300 62.4 2700 73.5 3200 84.6
1/2 / 15
2 to 7 0.14 to 0.48 Yellow
2 0.14 3600 97 4300 116 5000 134 5600 151
5 0.34 4100 109 4800 128 5400 144 6000 161
6 to 14 0.41 to 0.97 Green 10 0.69 4500 120 5200 141 5900 158 6500 175
12 to 25 0.83 to 1.7 Red
15 1.0 4100 111 4900 132 5600 150 6300 169
20 1.4 4800 129 5500 148 6200 166 6800 183
25 1.7 5200 140 6000 161 6600 178 7300 195
20 to 38 1.4 to 2.6 Blue
25 1.7 6100 164 7100 191 7800 209 8500 228
30 2.1 6600 178 7700 206 8400 225 9100 244
35 2.4 7200 192 8300 222 8900 240 9600 258
3/4 and 1 /
20 and 25
2 to 7 0.14 to 0.48 Yellow
2 0.14 6400 171 7800 209 9400 252 11,000 295
5 0.34 7100 189 8500 229 10,000 270 12,000 311
6 to 14 0.41 to 0.97 Green 10 0.69 8300 221 9900 265 12,000 310 13,000 355
12 to 25 0.83 to 1.7 Red
15 1.0 8400 226 10,000 271 13,000 335 15,000 400
20 1.4 9100 244 11,000 293 14,000 367 16,000 441
25 1.7 9700 260 12,000 315 15,000 398 18,000 482
20 to 38 1.4 to 2.6 Blue
25 1.7 8800 236 11,000 292 14,000 387 18,000 482
30 2.1 9300 249 11,000 308 15,000 415 19,000 522
35 2.4 9700 259 12,000 320 16,000 442 21,000 563
Table 11. Air Relief Capacities in SCFH / Nm
3
/h, Types MR98L and MR98LD with Metal Diaphragm (continued)