Data Sheet

Bulletin 71.4:MR108
8
SPRINGRANGE,
PARTNUMBER,
COLORCODE
RELIEF
PRESSURE
SETTING
C
v
at % BUILDUP
NPS1/DN25Body NPS2/DN50Body NPS3/DN80Body NPS4/DN100Body
psig bar 10% 20% 30% 40% 10% 20% 30% 40% 10% 20% 30% 40% 10% 20% 30% 40%
5 to 14 psig /
0.35 to 0.97 bar
GE42909X012
(White)
5 0.34 5.76 10.7 13.8 16 12.3 24.6 33.9 41.8 26.5 41.5 59.4 74.0 23.2 32.9 44.4 54.1
10 0.69 11.2 15.8 16.9 17.2 23.2 40.7 48.2 48.2 40.3 71.1 94.0 103 34.1 54.8 79.2 96.9
8 to 24 psig /
0.55 to 1.7 bar
GE42910X012
(Silver)
10 0.69 7.28 13.0 15.2 16.4 16.6 29.2 40.8 47.6 29.9 50.0 69.6 85.0 28.6 44.4 60.0 75.5
20 1.4 11.7 15.6 16.7 16.9 28.0 47.1 48.2 48.2 47.7 76.8 97.1 103 44.2 73.5 98.1 124
12 to 30 psig /
0.83 to 2.1 bar
GE42911X012
(Orange)
15 1.0 6.57 12.3 15.5 16.8 16.7 29.1 41.9 48.2 30.1 51.3 68.6 81.6 30.9 48.8 66.7 83.3
25 1.7 12.1 15.7 17.3 17.5 25.0 43.1 48.2 48.2 42.3 67.0 87.6 101 43.1 72.9 98.6 124
30 2.1 12.8 16.1 17.0 17.0 27.1 45.5 48.2 48.2 46.4 73.4 95.8 103 46.1 80.4 113 132
15 to 35 psig /
1.0 to 2.4 bar
GE43002X012
(Red)
15 1.0 6.45 10.6 13.9 15.2 13.0 22.2 31.0 39.5 24.9 40.1 56.8 69.3 26.5 41.4 54.7 68.8
25 1.7 9.05 13.6 15.7 16.3 19.0 33.6 43.6 48.2 30.9 53.8 73.2 89.4 36.2 59.7 82.1 102
35 2.4 10.7 15.5 16.4 16.8 24.3 42.0 48.2 48.2 41.9 65.9 89.1 102 45.0 74.1 103 127
SPRINGRANGE,
PARTNUMBER,
COLORCODE
RELIEF
PRESSURE
SETTING
C
v
at % BUILDUP
NPS1/DN25Body NPS2/DN50Body NPS3/DN80Body NPS4/DN100Body
psig bar 10% 20% 30% 40% 10% 20% 30% 40% 10% 20% 30% 40% 10% 20% 30% 40%
25 to 40 psig /
1.7 to 2.8 bar
GE42906X012
(Blue)
25 1.7 5.56 9.38 12.7 14.7 12.9 24.2 36.3 42.4 21.9 34.3 47.3 57.5 27.2 45.7 57.7 70.4
35 2.4 8.16 13.7 15.7 17.0 18.8 34.3 43.8 48.2 26.1 41.2 55.1 71.2 34.6 50.3 68.5 84.6
40 2.8 7.59 14.5 16.9 17.5 19.0 38.0 45.9 48.2 28.0 43.3 59.6 79.4 39.0 55.8 74.0 95.0
35 to 70 psig /
2.4 to 4.8 bar
GE42907X012
(Green)
35 2.4 5.54 10.4 14.5 15.5 13.6 23.0 33.1 41.2 21.7 34.2 43.7 53.2 29.1 44.3 57.4 68.1
50 3.4 8.02 13.5 15.8 17.0 16.1 32.4 42.7 47.4 25.6 38.2 52.3 68.2 33.1 49.1 66.3 84.4
70 4.8 10.3 15.8 17.1 17.5 24.4 41.1 48.2 48.2 27.9 46.8 69.3 87.8 35.5 57.6 83.5 109
55 to 120 psig /
3.8 to 8.3 bar
GE42909X012
(White)
55 3.8 6.01 11.7 14.7 16.1 14.0 24.6 36.0 42.9 23.7 33.8 44.6 57.4 29.7 42.2 56.4 71.0
75 5.2 7.58 14.2 16.2 17.0 16.7 31.4 42.9 48.2 25.2 38.3 55.7 71.4 31.3 48.6 67.2 87.3
120 8.3 13.2 16.6 17.5 17.5 28.7 43.9 48.2 48.2 30.0 54.1 77.6 96.8 37.3 65.6 92.4 117
90 to 200 psig /
6.2 to 13.8 bar
GE42910X012
(Silver)
100 6.9 7.92 13.8 16.0 16.9 16.4 29.8 40.5 48.0 22.8 35.3 50.0 64.1 28.8 44.2 60.8 75.6
150 10.3 12.7 16.0 16.9 17.1 21.5 39.1 46.8 48.2 26.4 47.7 68.1 87.7 34.5 58.8 82.5 106
200 14.8 14.7 16.8 17.3 17.3 27.4 43.9 48.2 48.2 32.9 58.6 80.6 97.9 40.6 72.3 104 130
175 to 300 psig /
12.1 to 20.7 bar
GE43002X012
(Red)
175 12.1 7.90 13.5 15.7 16.6 14.4 26.3 35.6 42.0 20.6 33.7 48.1 62.5 27.2 43.7 59.7 76.2
250 17.2 11.3 15.5 16.8 17.0 19.5 34.2 43.5 47.1 26.4 45.5 65.9 82 33.4 55.2 77.4 97.5
300 20.7 12.9 16.7 17.1 22.8 39.5 48.2 30.2 52.9 71.1 34.8 58.9 84.8
- Shaded areas indicate where pressure conditions exceed the pressure limit of the actuator.
Table 6. Typical C
v
Coefcient With Quick Opening Cage - Setpoint Made at 10% Flow (For Type MR108 Low-Pressure Actuator)
Table 7. Typical C
v
Coefcient With Quick Opening Cage - Setpoint Made at 10% Flow (For Type MR108 High-Pressure Actuator)