Data Sheet

Bulletin 71.4:MR98
20
- continued -
Table 11. Air Relief Capacities in SCFH / Nm
3
/h, Types MR98L and MR98LD with Metal 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 0.14 290 7.68 500 13.3 710 18.9 870 23.4 1000 27.9
5 0.34 330 8.77 550 14.6 760 20.5 940 25.3 1100 30.2
6 to 14 0.41 to 0.97 Green 10 0.69 290 7.72 510 13.7 730 19.6 930 25.1 1100 30.5
12 to 25 0.83 to 1.7 Red
15 1.0 280 7.39 480 12.9 690 18.5 890 23.8 1100 29.1
20 1.4 330 8.83 570 15.3 810 21.7 1000 27.4 1200 33.1
25 1.7 360 9.68 610 16.4 860 23.1 1100 29.1 1300 35.1
20 to 38 1.4 to 2.6 Blue
25 1.7 340 9.21 550 14.6 750 20.1 950 25.5 1200 30.9
30 2.1 390 10.5 600 16.1 810 21.8 1000 27.4 1200 33
35 2.4 420 11.2 640 17.3 870 23.3 1100 29 1300 34.7
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 1800 47.2 2300 62.9 2900 78.6 3300 88.5 3700 98.4
12 to 25 0.83 to 1.7 Red
15 1.0 1000 27 1700 45.9 2400 64.8 2900 77.3 3300 89.7
20 1.4 1500 39.5 2300 62.5 3200 85.5 3600 97.7 4100 110
25 1.7 1500 40 2400 64.9 3300 89.7 3900 104 4400 119
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 2000 52.3 2800 74.9 3600 97.5 4300 115 5000 133
5 0.34 2600 69.9 3500 92.9 4300 116 5000 133 5600 150
6 to 14 0.41 to 0.97 Green 10 0.69 2600 70 3800 103 5000 135 5800 157 6600 178
12 to 25 0.83 to 1.7 Red
15 1.0 2500 66.7 3700 99.7 5000 133 5900 157 6800 181
20 1.4 2500 66.3 3900 104 5300 141 6300 168 7300 195
25 1.7 2500 67.3 4000 108 5500 148 6600 177 7700 206
20 to 38 1.4 to 2.6 Blue
25 1.7 2100 55.5 3400 90.8 4700 126 5700 153 6700 180
30 2.1 2300 61.4 3600 97.4 5000 133 6000 162 7100 190
35 2.4 2500 66.3 3800 102 5100 137 6200 167 7400 197