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FLASH
SEPARATORS
Sizing,
Selection, and Dimensions |
| "I" |
Inlet |
Specify
Size to Match Return or Blowdown Line Size |
| "H" |
Height |
34"
- 56" - 72" - 96" - 108" |
| "DIA" |
Outside
Diameter |
6.625"
- 8.625" - 10.75" - 14" - 16"
- 18" - 20" - 24" - 30" - 36" |
| "D" |
Drain |
1"
- 1 1/4" - 1 1/2" - 2" - 2 1/2"
- 3" - 4" - 5" |
| "V" |
Vent |
2"
- 2 1/2" - 3" - 4" - 5" - 6"
- 8" - 10" - 12" - 14" - 16"
- 18" |
| "PL" |
Plate
Thickness |
Std.
Wt. - 5/16" - 3/8" |
|
| Flash
Separators are sized for the condensate flow entering
the tank and the amount of flash steam that is produced
when venting to a lower pressure. To select a flash separator
use Chart "A" to determine the flash steam amount and
Chart "B" that gives the size of tank and nozzle connections
sizes required.
CHART "A" - PERCENTAGE FLASH STEAM
To use Chart A follow the "PRESSURE FROM" (horizontal
at the top) down vertically to the "FLASH TO" pressure.
All pressures are in psig.
| PRESSURE
FROM PSIG |
| F
L
A
S
H
T
O
P
S
I
G |
|
600 |
500 |
450 |
400 |
350 |
300 |
250 |
200 |
150 |
100 |
75 |
50 |
25 |
| 500 |
2.8 |
|
|
|
|
|
|
|
|
|
|
|
|
| 400 |
5.8 |
3.1 |
1.3 |
|
|
|
|
|
|
|
|
|
|
| 350 |
7.5 |
4.8 |
3.0 |
1.8 |
|
|
|
|
|
|
|
|
|
| 300 |
9.2 |
6.6 |
4.8 |
3.6 |
1.9 |
|
|
|
|
|
|
|
|
| 250 |
11.1 |
8.5 |
6.8 |
5.6 |
3.9 |
2.1 |
|
|
|
|
|
|
|
| 225 |
12.2 |
9.7 |
8.0 |
6.8 |
5.1 |
3.3 |
1.2 |
|
|
|
|
|
|
| 200 |
13.3 |
10.8 |
9.1 |
7.9 |
6.2 |
4.4 |
2.4 |
|
|
|
|
|
|
| 175 |
14.4 |
11.9 |
10.3 |
9.1 |
7.4 |
5.7 |
3.7 |
1.3 |
|
|
|
|
|
| 150 |
15.7 |
13.2 |
11.6 |
10.4 |
8.8 |
7.0 |
5.0 |
2.7 |
|
|
|
|
|
| 125 |
17.1 |
14.6 |
13.0 |
11.9 |
10.3 |
8.5 |
6.6 |
4.3 |
1.6 |
|
|
|
|
| 100 |
18.6 |
16.2 |
14.6 |
13.5 |
11.9 |
10.2 |
8.3 |
6.0 |
3.4 |
|
|
|
|
| 75 |
20.3 |
18.0 |
16.4 |
15.3 |
13.7 |
12.1 |
10.2 |
7.9 |
5.4 |
2.0 |
|
|
|
| 50 |
22.6 |
20.3 |
18.8 |
17.7 |
16.1 |
14.5 |
12.6 |
10.4 |
7.9 |
4.6 |
2.6 |
|
|
| 25 |
25.4 |
23.1 |
21.6 |
20.6 |
19.1 |
17.5 |
15.6 |
13.5 |
11.0 |
7.8 |
5.9 |
3.3 |
|
| 15 |
26.9 |
24.7 |
23.2 |
22.1 |
20.6 |
19.0 |
17.2 |
15.1 |
12.7 |
9.5 |
7.6 |
5.1 |
1.8 |
| 10 |
27.8 |
25.6 |
24.2 |
23.1 |
21.6 |
20.1 |
18.3 |
16.2 |
13.8 |
10.6 |
8.7 |
6.2 |
2.9 |
| 5 |
28.9 |
26.7 |
25.2 |
24.2 |
22.7 |
21.1 |
19.4 |
17.3 |
14.9 |
11.8 |
9.9 |
7.4 |
4.2 |
| 0 |
30.2 |
28.0 |
26.6 |
25.6 |
24.1 |
22.6 |
20.8 |
18.8 |
16.4 |
13.3 |
11.4 |
9.0 |
5.8 |
|
|
LBS/HR
Condensate |
LBS/HR
FLASH STEAM |
| 100 |
500 |
700 |
1000 |
2000 |
3000 |
4000 |
8000 |
12000 |
18000 |
21000 |
25000 |
35000 |
| 100,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
108
30
5
2 |
108
30
5
2 |
108
30
5
2 1/2 |
108
30
5
3 |
108
30
5
4 |
108
30
5
5 |
108
30
5
6 |
108
30
5
8 |
108
30
5
10 |
108
30
5
12 |
108
30
5
14 |
108
36
5
16 |
108
36
4
18 |
| |
96
30
5
2 |
96
30
5
2 |
96
30
5
2 1/2 |
96
30
5
3 |
96
30
5
4 |
96
30
5
5 |
96
30
5
6 |
96
30
5
8 |
96
30
5
10 |
96
30
5
12 |
96
30
4
14 |
96
36
4
16 |
96
36
4
18 |
| 80,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
96
24
5
2 |
96
24
5
2 |
96
24
5
2 1/2 |
96
24
5
3 |
96
24
5
4 |
96
24
5
5 |
96
24
5
6 |
96
24
5
8 |
96
24
4
10 |
96
24
4
12 |
96
30
4
14 |
96
36
4
16 |
96
36
4
18 |
| 70,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
72
24
4
2 |
72
24
4
2 |
72
24
4
2 1/2 |
72
24
4
3 |
72
24
4
4 |
72
24
4
5 |
72
24
4
6 |
72
24
4
8 |
72
24
4
10 |
72
24
4
12 |
72
30
4
14 |
72
36
4
16 |
72
36
4
18 |
| 60,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
56
24
4
2 |
56
24
4
2 |
56
24
4
2 1/2 |
56
24
4
3 |
56
24
4
4 |
56
24
4
5 |
56
24
4
6 |
56
24
4
8 |
56
24
4
10 |
56
24
4
12 |
56
30
4
14 |
56
36
4
16 |
|
| 50,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
72
20
4
2 |
72
20
4
2 |
72
20
4
2 1/2 |
72
20
4
3 |
72
20
4
4 |
72
20
4
5 |
72
20
4
6 |
72
20
4
8 |
72
20
4
10 |
72
24
4
12 |
72
30
3
14 |
72
36
3
16 |
|
| 40,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
56
20
4
2 |
56
20
4
2 |
56
20
4
2 1/2 |
56
20
4
3 |
56
20
4
4 |
56
20
4
5 |
56
20
4
6 |
56
20
4
8 |
56
20
3
10 |
56
24
3
12 |
56
30
3
14 |
|
|
| 30,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
56
18
3
2 |
56
18
3
2 |
56
18
3
2 1/2 |
56
18
3
3 |
56
18
3
4 |
56
18
3
5 |
56
18
3
6 |
56
18
3
8 |
56
20
3
10 |
56
24
2 1/2
12 |
|
|
|
| 20,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
56
14
2 1/2
2 |
56
14
2 1/2
2 |
56
14
2 1/2
2 1/2 |
56
16
2 1/2
3 |
56
16
2 1/2
4 |
56
16
2 1/2
5 |
56
16
2 1/2
6 |
56
16
2 1/2
8 |
56
20
2
10 |
|
|
|
|
| |
34
14
2
2 |
34
14
2
2 |
34
14
2
2 1/2 |
34
14
2
3 |
34
14
2
4 |
34
14
2
5 |
34
14
2
6 |
56
16
1.5
8 |
|
|
|
|
|
| 5,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
34
10
1 1/2
2 |
34
10
1 1/2
2 |
34
10
1 1/2
2 1/2 |
34
10
1 1/2
3 |
34
14
1 1/2
4 |
34
14
1 1/2
5 |
34
14
1 1/2
6 |
|
|
|
|
|
|
| 3,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
34
10
1 1/4
2 |
34
10
1 1/4
2 |
34
10
1 1/4
2 1/2 |
34
10
1 1/4
3 |
34
14
1 1/4
4 |
|
|
|
|
|
|
|
|
| 2,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
34
8
1 1/4
2 |
34
8
1 1/4
2 |
34
8
1
2 1/2 |
34
10
1
3 |
|
|
|
|
|
|
|
|
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| 1,000 |
HEIGHT |
| DIA. |
| DRAIN |
| VENT |
|
34
6
1
2 |
34
8
1
2 |
34
8
1
2 1/2 |
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CHART
"B" - SIZING FOR FLASH SEPARATOR
To use Chart B select the Flash Separator by finding
the flash amount across the top and going down to the
total condensate flow rate entering the separator shown
on the left side of the chart.
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The drain
and vent sizes listed in Chart "B" are based on atmospheric
operating conditions. When the flashing to pressure
is above atmospheric pressure, smaller drain and vent
sizes can be used. The drain size in no case should
be smaller then the trap connection size. To determine
the minimum vent size use the following formula:
.
Where:
Dia. Equals the minimum diameter of vent (inches)
F The amount of flash steam in lbs./hour
SV Is the specific volume of steam (cu. Ft/lbs.)
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