Data Sheet

Bulletin 71.4:MR98
19
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 1500 41.2 1800 48.4 2000 54 2200 59.7
5 0.34 1700 44.8 1900 51.5 2100 57.6 2400 63.7
6 to 14 0.41 to 0.97 Green 10 0.69 2000 53.2 2200 59.6 2400 64.9 2600 70.2
12 to 25 0.83 to 1.7 Red
15 1.0 2200 58.9 2500 65.8 2600 70.7 2800 75.7
20 1.4 2400 65 2700 72.1 2900 77.4 3100 82.8
25 1.7 2600 69.9 2900 77.1 3100 83.2 3300 89.3
20 to 38 1.4 to 2.6 Blue
25 1.7 2600 70.5 2900 78.6 3100 83.9 3300 89.2
30 2.1 2800 76.3 3100 84.2 3400 90.3 3600 96.4
35 2.4 3100 82.2 3400 90.6 3600 96.9 3800 103
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 4800 128 5400 145 6000 161 6600 177
12 to 25 0.83 to 1.7 Red
15 1.0 5400 144 6000 162 6600 178 7300 195
20 1.4 6000 162 6700 180 7300 197 8000 213
25 1.7 6600 177 7300 196 7900 212 8500 228
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 6700 181 7900 212 9700 259 11,000 306
5 0.34 7900 212 9300 249 11,000 288 12,000 327
6 to 14 0.41 to 0.97 Green 10 0.69 9200 247 11,000 284 12,000 325 14,000 366
12 to 25 0.83 to 1.7 Red
15 1.0 11,000 283 12,000 320 13,000 360 15,000 401
20 1.4 12,000 318 13,000 353 15,000 391 16,000 429
25 1.7 13,000 349 14,000 387 16,000 427 17,000 466
20 to 38 1.4 to 2.6 Blue
25 1.7 12,000 334 14,000 386 17,000 447 19,000 508
30 2.1 14,000 367 16,000 424 18,000 480 20,000 536
35 2.4 15,000 390 17,000 451 19,000 507 21,000 562
Table 10. Air Relief Capacities in SCFH / Nm
3
/h, Types MR98L and MR98LD with Elastomer Diaphragm (continued)