Data Sheet

Bulletin 71.1:CS800
33
Figure 17. Type CS820IR Relief Curves (Blocked Open per Orice Size) at 2 psig / 0.14 bar Set Pressure
Figure 18. Type CS820IQ High Capacity Relief Curves (Blocked Open per Orice Size) at 2 psig / 0.14 bar Set Pressure
INLET PRESSURE, psig / bar
1 NPT VENT SIZE
OUTLET PRESSURE, psig / mbar
0
10 /
0.69
7 / 483
6.5 / 448
6 / 414
5.5 / 379
5 / 345
4.5 / 310
4 / 276
3.5 / 241
3 / 207
2.5 / 172
2 / 138
20 /
1.4
30 /
2.1
40 /
2.8
50 /
3.4
60 /
4.1
70 /
4.8
80 /
5.5
90 /
6.2
100 /
6.9
110 /
7.6
120 /
8.3
1-3/8 in. /
35 mm
ORIFICE
7/8 in. /
22 mm
ORIFICE
3/4 in. /
19 mm
ORIFICE
5/8 in. /
16 mm
ORIFICE
1 in. /
25 mm
ORIFICE
1/2 in. /
13 mm
ORIFICE
3/8 in. /
9.5 mm
ORIFICE
1/4 in. /
6.4 mm
ORIFICE
INLET PRESSURE, psig / bar
HIGH CAPACITY 2-1/2 NPT VENT SIZE
OUTLET PRESSURE, psig / mbar
0
10 /
0.69
7 / 483
6.5 / 448
6 / 414
5.5 / 379
5 / 345
4.5 / 310
4 / 276
3.5 / 241
3 / 207
2.5 / 172
2 / 138
20 /
1.4
30 /
2.1
40 /
2.8
50 /
3.4
60 /
4.1
70 /
4.8
80 /
5.5
90 /
6.2
100 /
6.9
110 /
7.6
120 /
8.3
1-3/8 in. /
35 mm
ORIFICE
1 in. /
25 mm
ORIFICE
7/8 in. /
22 mm
ORIFICE
3/4 in. /
19 mm
ORIFICE
5/8 in. /
16 mm
ORIFICE
1/2 in. /
13 mm
ORIFICE
3/8 in. /
9.5 mm
ORIFICE
1/4 in. /
6.4 mm
ORIFICE