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BLOWOFF TANK SIZING

1. Calculate the Cu. Ft. amount of blowoff when lowering the Boiler Water Level 4". The following formula should be used: Cu. Ft. of Blowoff = 4"/12" X Drum Dia. Ft. X Drum Length Ft.

2. Select a Blowoff Tank which has Cu. Ft. holding capacity equal to the amount calculated.If the amount of Blowoff is known select a tank with that amount holding capacity.

3. Select the drain and vent nozzles below using the Blowdown Valve Size and Boiler Operating Pressure.The inlet should be the same size as the Blowoff Valve.

BLOWOFF TANK SELECTOR CHART

Tank Cu. Ft. Holding Capacity
Tank Diameter
Overall Tank Height
Tank Total Cu. Ft.
Tank Total Gallons
2.2 Cubic Feet
18"
3'
4.4
32.7
3.0 Cubic Feet
18"
4'
6
44.8
3.7 Cubic Feet
20"
4'
7.4
55.5
4.7 Cubic Feet
20"
5'
9.4

70.6
5.3 Cubic Feet
24"
4'
10.6
79.6
6.8 Cubic Feet
24"
5'
13.6
101.7
8.2 Cubic Feet
30"
4'
16.5
123.1
10.6 Cubic Feet
30"
5'
21.1
158
12.9 Cubic Feet
30"
6'
25.8
192.9
13.5 Cubic Feet
36"
5'
26.9
201.4
16.8 Cubic Feet
36"
6'
33.6
251.4
20.2 Cubic Feet
42"
5'
40.5
302.9
24.9 Cubic Feet
42"
6'
49.8
372.3
29.5 Cubic Feet
42"
7'
59.1
441.7
32.1 Cubic Feet
48"
6'
64.3
480.9
38.2 Cubic Feet
48"
7'
76.5
572
47.8 Cubic Feet
54"
7'
95.6
715.3
55.5 Cubic Feet
54"
8'
111.1
831
58.4 Cubic Feet
60"
7'
116.9
874.3
68.0 Cubic Feet
60"
8'
136
1017.5
77.6 Cubic Feet
60"
9'
155.2
1160.7
96.1 Cubic Feet
72"
8'
192.1
1437.3
109.9 Cubic Feet
72"
9'
219.8
1644.4
123.8 Cubic Feet
72"
10'
247.5
1851.5

NOZZLE SELECTOR CHART
0-50 PSIG
51-150 PSIG
151-300 PSIG
BVD SIZE
INLET
DRAIN
VENT
INLET
DRAIN
VENT
INLET
DRAIN
VENT
1"
1"
2 1/2"
2 1/2"
1"
3"
4"
1"
4"
6"
1 1/4"
1 1/4"
3"
3"
1 1/4"
4"
6"
1 1/4"
4"
6"
1 1/2"
1 1/2"
3"
4"
1 1/2"
4"
6"
1 1/2"
6"
8"
2"
2"
4"
4"
2"
6"
6"
2"
6"
10"
2 1.5
2 1/2"
6"
6"
2 1/2"
6"
8"
2 1/2"
8"
10"

 
301-800 PSIG
801-1200 PSIG
1201-1600 PSIG
BVD SIZE
INLET
DRAIN
VENT
INLET
DRAIN
VENT
INLET
DRAIN
VENT
1"
1"
3"
6"
1"
4"
8"
1"
4"
10"
1 1/4"
1 1/4"
6"
10"
1 1/4"
6"
12"
1 1/4"
6"
12"
1 1/2"
1 1/2"
6"
10"
1 1/2"
6"

12"
1 1/2"
6"
14"
2"
2"
6"
14"
2"
8"
16"
2"
8"
18"
2 1.5
2 1/2"
8"
16"
2 1/2"
8"
20"
2 1/2"
8"
24"

 
   
PENN SEPARATOR CORPORATION
5 South Pickering
P.O. BOX 340
Brookville, PA 15825
(814) 849-7328
Fax: (814) 849-4510
TOLL FREE: 1-888-PENN-SEP (7366-737)

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