Note:  There are some errors in this table. Some appear to be the result of considering the weight of the valve or not considering it. Some of the steel tanks are hot dipped zinc coated and some (Faber) usually are thin elecro-plated with a over coat of paint.
 

Pressed Steel Manufacturer (Steel)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
77
2400
NEG 2.0 LBS
96
2400
NEG 3.5 LBS
104
2400
0
120
2400
NEG 2.5 LBS
65
3500
NEG 1.5 LBS
80
3500
NEG 1 LBS
100
3500
ZERO
120
3500
POS 1.0 LBS
 
Faber Manufacturer (Steel)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
95
2400
NEG 1.2 LBS
72
3000
NEG 5.9 LBS
76
2400
NEG 1.7 LBS
 
OMS Manufacturer (Steel)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
13
2400
NEG 2.5 LBS
46
2400
ZERO
66
2400
NEG 1.67
85
2400
ZERO
98
2400
ZERO
112
2400
NEG 1.0 LBS
125
2400
ZERO
131
2400
POS 0.75 LBS
 
Luxfer Manufacturer (Aluminum)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
6
3000
ZERO
13
3000
NEG 0.6 LBS
19
3000
NEG 0.2 LBS
30
3000
POS 1.0 LBS
40
3000
POS 2.1 LBS
50
3000
POS 1.2 LBS
63
3000
POS 2.3 LBS
80
3000
POS 3.9 LBS
100
3300
POS 3.5 LBS
 
Catalina Manufacturer (Aluminum)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
6
3000
NEG 0.9 LBS
13
3000
NEG 0.4 LBS
30
3000
ZERO
40
3000
ZERO
53
3000
ZERO
67
3000
ZERO
80
3000
POS 4.1 LBS
 
Beuchat Manufacturer  (Steel)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
95
3190
NEG 17.82 LBS
120
3190
NEG 17.82 LBS
140
3190
NEG 18.04 LBS
190
440
NEG 46.86 LBS
 
Coyne Manufacturer  (Steel)
 
Cubic Feet
Rated Pressure
Bouyancy in Seawater with valve when Empty
65.09
2400
NEG 2.57 LBS
77.66
2400
NEG 1.89 LBS
95.79
2400
NEG .85 LBS
122.33
2700
NEG 13.06 LBS