BS&B Graphite Disk Brochure - G&W Industrial Sales in Parkersburg ...

Venting Capacities
Venting capacities are expressed below in standard cubic feet per
minute of air x 1000 at standard
conditions. Adjustments must be made when utilizing vacuum supports.
Vacuum Example: An 8” Monobloc disk @ 10 psig utilizing a
bar type of vacuum support, reduces the original capacity by a factor
of .80 . Example: 19.5 x .80 = 15.6 x 1000 SCFM air
Venting capacities are based upon ASME VIII UG 131, using a
Burst
Rating
psig
1/4
1/2
1
1 1/2
2
3
4
5
6
7
8
9
10
15
20
25
30
40
50
75
100
125
150
175
200
225
250
275
300
350
400
450
500
1000
1/2 15 3/4 20 1 25 1
1/2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.0942
0.106
0.131
0.156
0.217
0.278
0.340
0.410
0.462
0.524
0.585
0.647
0.708
0.769
0.892
1.01
1.14
1.26
2.49
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.212
0.240
0.295
0.350
0.488
0.626
0.764
0.902
1.04
1.18
1.32
1.45
1.59
1.73
2.01
2.28
2.56
2.84
5.60
-
-
-
-
-
-
-
-
-
-
-
-
0.229
0.279
0.328
0.377
0.426
0.524
0.622
0.868
1.11
1.36
1.60
1.85
2.09
2.34
2.59
2.83
3.08
3.57
4.06
4.55
5.04
9.95
Disk Diameter (in/mm)
0.62 coefficient of discharge*, ratio of specific heats of 1.4 and a
“Z” (compressibility) of 1.0 which simulates an entry into a vent
system from a process vessel. Below 15 psig the flow becomes
subcritical and appropriate corrections have been made to the
venting capacities (calculated according to API guidelines).
Alternately the low K R values for graphite disks can be used for
the determination of vent system campacity. This may permit the
use of a smaller size of graphite disk.
40 2 50 3 80 4 100 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600
- - - -
- - - -
- - 0.666 1.18
- - 0.814 1.45
- 0.417 0.939 1.67
- 0.510 1.15 2.04
- 0.587 1.32 2.35
- 0.655 1.47 2.62
- 0.715 1.61 2.86
0.433 0.771 1.73 3.08
0.462 0.822 1.85 3.29
0.489 0.869 1.96 3.48
0.514 0.914 2.06 3.66
0.627 1.11 2.51 4.46
0.737 1.31 2.95 5.24
0.848 1.51 3.39 6.03
0.958 1.70 3.83 6.81
1.18 2.40 4.72 8.38
1.40 2.49 5.60 9.95
1.95 3.47 7.81 13.9
2.50 4.45 10.0 17.8
3.06 5.43 12.2 21.7
3.61 6.42 14.4 25.7
4.16 7.40 16.6 29.6
4.71 8.38 18.9 33.5
5.27 9.36 21.1 37.4
5.82 10.3 23.3 41.4
6.37 11.3 25.5 45.3
6.92 12.3 27.7 49.2
8.03 14.3 32.1 57.1
9.13 16.2 36.5 64.9
10.2 18.2 40.9 72.8
11.3 20.2 45.4 80.6
22.4 - - -
- - 3.71 5.34 7.26 9.49 12.0 14.8
- 3.35 5.24 7.54 10.3 13.4 16.9 20.9
2.66 4.73 7.40 10.7 14.5 18.9 24.0 29.6
3.26 5.79 9.05 13.0 17.7 23.2 29.3 36.2
3.76 6.68 10.4 15.0 20.4 26.7 33.8 41.7
4.59 8.15 12.7 18.3 24.9 32.6 41.3 50.9
5.28 9.39 14.7 21.1 28.8 37.6 47.5 58.7
5.89 10.5 16.4 23.6 32.0 41.9 53.0 65.5
6.44 11.4 17.9 25.7 35.0 45.8 57.9 71.5
6.93 12.3 19.3 27.7 37.8 49.3 62.4 77.0
7.39 13.1 20.5 29.6 40.3 52.6 66.6 82.2
7.82 13.9 21.7 31.3 42.6 55.6 70.4 86.9
8.23 14.6 22.9 32.9 44.8 58.5 74.0 91.4
10.0 17.8 27.8 40.1 54.6 71.3 90.2 111
11.8 21.0 32.8 47.2 64.2 83.9 106 131
13.6 24.1 37.7 54.2 73.8 96.4 122 151
15.3 27.2 42.6 61.3 83.5 109 138 170
18.9 33.5 52.4 75.4 103 134 170 210
22.4 39.8 62.2 89.6 122 159 202 249
31.2 55.5 86.8 125 170 222 281 347
40.1 71.2 111 160 218 285 361 445
48.9 86.9 136 196 266 348 440 543
57.7 103 160 231 314 411 520 642
66.6 118 - - - - - -
75.4 134 - - - - - -
84.3 150 - - - - - -
93.1 165 - - - - - -
102 181 - - - - - -
111 197 - - - - - -
128 228 - - - - - -
146 260 - - - - - -
164 291 - - - - - -
- - - - - - - -
- - - - - - - -
Vacuum Support Factors Dial Type: to 9 psig (0.62 bar) Bar Type: 10psig (0.69 bar) - 22psig (1.52bar)
SIZE1/23/411 1/2 2 3 4 6 8 10 12 14 16 18 20 24
Dial Type---.56.57.60.62.58.60.60.60.60.60.60.60.60
Bar Type--.70.80.80.80.80.80.80.80.80.80.80.80.80.80
Sold By: G&W Industrial Sales
304-422-4755
21.3
30.2
42.6
52.1
60.1
73.4
84.5
94.3
103
111
118
125
132
160
189
217
245
302
358
500
641
783
924
-
-
-
-
-
-
-
-
-
-
-
To be used for direct discharge to the atmosphere,
disk installation eight diameters from vessel nozzle
entry, length of discharge pipe 5 pipe diameters,
nominal diameter of inlet and discharge piping the
NPS designation of the device.
mail@gwindustrial.com