Model
(Note: Final Dash

No. is Area Ratio)
Approximate Stall Point:


Approximate Practical Pressures
Based on 95 PSI Drive,
50% Efficiency s/N2

Maximum Safe
Pressure PSI
Actual
In Per
Cycle
Outlet PSI (Max)
Inlet PSI (Min)
Outlet
Inlet
Single Acting, Single Drive (Single Stage)
7 x Drive Air (No assist from gas inlet)
650
50
2500
2500
13.2
14 x Drive Air (No assist from gas inlet)
1300
100
2500
2500
13.2
30 x Drive Air (No assist from gas inlet)
2800
200
9000
9000
3.1
50 x Drive Air (No assist from gas inlet)
4500
300
15000
15000
1.76
75 x Drive Air (No assist from gas inlet)
7000
500
25000
25000
1.2
Single Acting, Double Drive (Single Stage)
60 x Drive Air (No assist from gas inlet)
5700
400
9000
9000
3.1
100 x Drive Air (No assist from gas inlet)
9000
450
15000
15000
1.76
150 x Drive Air (No assist from gas inlet)
14000
500
25000
25000
1.2
Double Acting, Single Drive (Single Stage)
(4 x Drive Air) + (1.00 x Gas Inlet)
400
50
1250
1250
24.1
(7 x Drive Air) + (1.00 x Gas Inlet)
700
50
2500
2500
26.4
(14 x Drive Air) + (1.00 x Gas Inlet)
1400
100
4500
4500
14
(30 x Drive Air) + (1.00 x Gas Inlet)
3000
200
9000
9000
6.2
(50 x Drive Air) + (1.00 x Gas Inlet)
5000
300
15000
15000
3.52
(75 x Drive Air) + (1.00 x Gas Inlet)
7500
500
25000
25000
2.4
Double Acting, Double Drive (Single Stage)
(14 x Drive Air) + (1.00 x Gas Inlet)
1400
100
2500
2500
26.4
(28 x Drive Air) + (1.00 x Gas Inlet)
2800
180
4500
4500
14
(60 x Drive Air) + (1.00 x Gas Inlet)
6000
400
9000
9000
6.2
(100 x Drive Air) + (1.00 x Gas Inlet)
10000
450
15000
15000
3.52
(150 x Drive Air) + (1.00 x Gas Inlet)
14500
500
25000
25000
2.4
Two Stage, Single Drive
(4 x Drive Air) + (1.00 x Gas Inlet)
380
10
1250
1250
12
(14 x Drive Air) + (2.00 x Gas Inlet) (b,c)
1350
30
4500
2500
13.2
(30 x Drive Air) + (4.29 x Gas Inlet) (b,c)
3000
60
9000
2500
13.2
(30 x Drive Air) + (2.14 x Gas Inlet) (b,c)
2900
60
9000
4500
7
(50 x Drive Air) + (3.57 x Gas Inlet)
4500
100
15000
2500
7
(75 x Drive Air) + (5.36 x Gas Inlet) (b,c)
7700
150
25000
4500
7
(50 x Drive Air) + (1.66 x Gas Inlet) (b,c)
5000
500
15000
9000
3.1
(75 x Drive Air) + (2.50 x Gas Inlet) (b,c)
7500
130
25000
9000
3.1
(92 x Drive Air) + (3.06 x Gas Inlet) (b,c)
9000
150
25000
9000
3.1
(92 x Drive Air) + (1.84 x Gas Inlet) (b,c)
9000
600
25000
15000
1.76
Two Stage, Double Drive
(28 x Drive Air) + (2.0 x Gas Inlet) (b,c)
2600
200
4500
2500
13.2
(60 x Drive Air) + (4.28 x Gas Inlet) (b,c)
6000
200
9000
2500
13.2
(60 x Drive Air) + (2.14 x Gas Inlet) (b,c)
6000
120
9000
4500
7
(100 x Drive Air) + (3.57 x Gas Inlet) (b,c)
10000
500
15000
4500
7
(150 x Drive Air) + (5.36 x Gas Inlet) (b,c)
14500
150
25000
4500
7
(100 x Drive Air) + (1.66 x Gas Inlet) (b,c)
10000
1000
15000
9000
3.1
(150 x Drive Air) + (2.50 x Gas Inlet) (b,c)
14000
150
25000
9000
3.1

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