Temperature/pressure ratings – Powers 597 Series Flowrite II Heavy Duty Balanced Control Valves User Manual
Page 5
TI597SI
Page 5
50
250
200
150
100
50
300
150
100
Pressure — psig
T
e
mperature —
°F
200
Maximum Media
Temperature
281°F
Minimum Media
Temperature
40°F
169 psig
597 SI
Figure 3 - Temperature and Pressure Ratings
TEMPERATURE/PRESSURE RATINGS
In all cases, do not exceed the temperature/pressure
ratings of the valve (see figure 3). Acceptable region is
shown by the shaded area.
Steam Inlet Pressure (psig)
75
100
125
Pressure Drop
(max)
Across Valve (psi)
10
20
30
40
45 10
20
30
40
50
10
20
30
40
50
Valve
Cv
Size
Rating
2.5
56
4840
6640
7873
8781
9146
5508
7610
9096
10236
11138
6104
8470
10172
11508
12595
3
85
7347
10079
11950
13329
13882
8361
11552
13806
15537
16906
9265
12857
15440
11467
19117
4
145
12533
17193
20386
22738
23681
14263
19706
23551
26504
28839
15805
21932
26339
29797
32611
5
240
20744
28457
33742
37635
39196
23607
32616
38981
43868
47734
26159
36302
43595
49320
53977
6
370
31980
43871
52018
58021
60426
36395
50283
60096
67630
73590
40329
55966
67209
76035
83215
Where:
W = Steam flow (lbs/hr)
Cv = Valve Flow Coefficient (US gpm with ΔP = psi)
K = 1+ (0.0007* ºF superheat)
P = Pressure differential, P1 - P2 (psi)
P1 = Inlet Pressure (psia)
P2 = Outlet pressure (psia)
Absolute Pressure = Gauge pressure + .7 (psia)
Δ