Data Sheet

Bulletin 71.4:MR98
18
Table 10. Air Relief Capacities in SCFH / Nm
3
/h, Types MR98L and MR98LD with Elastomer Diaphragm
NOMINAL
BODY
SIZE,
In. / DN
SPRING RELIEF
PRESSURE RANGE
COLOR
CODE
RELIEF
PRESSURE
SETTING
PRESSURE BUILD-UP OVER RELIEF SETTING, psig / bar
2 / 0.14 4 / 0.28  8 / 0.55 
psi bar psig bar SCFH Nm
3
/h 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 0.14 720 19.4 880 23.5 1000 27.5 1100 30.7 1300 34
5 0.34 890 24 1000 27.9 1200 31.7 1300 34.9 1400 38.1
6 to 14 0.41 to 0.97 Green 10 0.69 1100 29.9 1300 35.4 1500 40.8 1600 43.8 1700 46.8
12 to 25 0.83 to 1.7 Red
15 1.0 810 21.6 1200 32.6 1600 43.5 1800 47.7 1900 51.9
20 1.4 730 19.5 1300 33.8 1800 48.1 2000 53.1 2200 58
25 1.7 790 21.3 1400 37 2000 52.8 2200 57.7 2300 62.6
20 to 38 1.4 to 2.6 Blue
25 1.7 820 21.9 1300 36.1 1900 50.2 2100 56.3 2300 62.4
30 2.1 890 23.8 1500 39 2000 54.3 2300 61.3 2500 68.3
35 2.4 970 26 1600 42.5 2200 59.1 2500 66.4 2800 73.8
1/2 / 15
2 to 7 0.14 to 0.48 Yellow
2 0.14 1500 39.2 1900 49.9 2300 60.6 2600 69.2 2900 77.7
5 0.34 2000 52.9 2400 63.8 2800 74.7 3100 82.8 3400 90.9
6 to 14 0.41 to 0.97 Green 10 0.69 2200 60.3 2900 77.1 3500 93.9 3800 102 4100 110
12 to 25 0.83 to 1.7 Red
15 1.0 2000 54.7 3000 80.1 3900 106 4300 116 4700 126
20 1.4 2400 63.2 3400 92.4 4500 122 5000 133 5400 144
25 1.7 2300 62.2 3700 98 5000 134 5500 146 5900 159
20 to 38 1.4 to 2.6 Blue
25 1.7 1200 33.5 2300 61.7 3400 89.8 4200 113 5100 137
30 2.1 1500 39.6 2600 70.4 3800 101 4700 125 5600 149
35 2.4 1600 43.8 2900 76.5 4100 109 5100 135 6000 162
3/4 and 1 /
20 and 25
2 to 7 0.14 to 0.48 Yellow
2 0.14 2600 69.2 3400 92.2 4300 115 4900 132 5600 149
5 0.34 3600 96.6 4500 120 5300 143 5900 159 6500 175
6 to 14 0.41 to 0.97 Green 10 0.69 4000 106 5400 144 6800 181 7300 196 7900 211
12 to 25 0.83 to 1.7 Red
15 1.0 3700 100 5500 148 7300 196 8200 221 9200 246
20 1.4 4400 118 6500 173 8500 228 9500 255 11,000 282
25 1.7 4600 123 6900 184 9200 246 10,000 278 12,000 311
20 to 38 1.4 to 2.6 Blue
25 1.7 3200 86.2 5300 143 7400 199 9000 240 10,000 281
30 2.1 3400 91.9 5900 158 8400 225 10,000 268 12,000 310
35 2.4 4000 107 6500
175 9100 244 11,000 286 12,000 328
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